检索结果-内蒙古大学图书馆

arXiv 2021年

作者： Clarke, Gabriel Daisenberger, Dominik Luo, X. Cheong, S.W. Bristowe, Nicholas C. Senn, Mark Stephen Department of Chemistry University of Warwick Gibbet Hill CoventryCV4 7AL United Kingdom Diamond Light Source Ltd Harwell Science and Innovation Campus DidcotOX11 0DE United Kingdom Laboratory for Pohang Emergent Materials Pohang Accelerator Laboratory Max Plank POSTECH Center for Complex Phase Materials Pohang University of Science and Technology Pohang790-784 Korea Republic of Rutgers Center for Emergent Materials Department of Physics & Astronomy Rutgers University PiscatawayNJ08854 United States Centre for Materials Physics Durham University South Road DurhamDH1 3LE United Kingdom

The temperature-dependent phase transitions in Ruddlesden-Popper oxides with perovskite bi-layers have been under increased scrutiny in recent years due to the so-called hybrid improper ferroelectricity that some chemical compositions exhibit. However, little is currently understood about the hydrostatic pressure dependence of these phase transitions. Herein we present the results of a high-pressure powder synchrotron X-ray diffraction experiment and ab initio calculations on the bilayered Ruddlesden-Popper phases Ca3Mn2O7 and Ca3Ti2O7. In both compounds we observe a first-order phase transition between polar A21am and non-polar Acaa structures. Interestingly, we show that while the application of pressure ultimately favours a non-polar phase — as is commonly observed for proper ferroelectrics — regions of response exist where pressure actually acts to increase the polar mode amplitudes. The reason for this can be untangled by considering the varied response of octahedral tilts and rotations to hydrostatic pressure and their trilinear coupling with the polar instability. © 2021, CC BY.

关键词： Hydrostatic pressure

来源：评论

学校读者我要写书评

暂无评论

Photo-induced plasmon-phonon coupling in PbTe

arXiv

引用

arXiv 2021年

作者： Jiang, M.P. Trigo, M. Fahy, S. Hauber, A. Murray, É.D. Savić, I. Bray, C. Clark, J.N. Henighan, T. Kozina, M. Chollet, M. Glownia, J.M. Hoffmann, M.C. Zhu, D. Delaire, O. May, A.F. Sales, B.C. Lindenberg, A.M. Zalden, P. Sato, T. Merlin, R. Reis, David A. Stanford PULSE Institute SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Department of Physics Stanford University StanfordCA94305 United States Tyndall National Institute Department of Physics University College Cork Ireland Departments of Physics and Materials Imperial College London LondonSW7 2AZ United Kingdom Department of Applied Physics Stanford University StanfordCA94305 United States Linac Coherent Light Source SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Materials Science and Technology Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Materials Science and Engineering Stanford University StanfordCA94305 United States Department of Physics University of Michigan Ann ArborMI48109 United States

We report the observation of photo-induced plasmon-phonon coupled modes in the group IV-VI semiconductor PbTe using Fourier-transform inelastic X-ray scattering at the Linac Coherent light source (LCLS). We measure the near-zone-center dispersion of the heavily screened longitudinal optical (LO) phonon branch as extracted from differential changes in x-ray diffuse scattering intensity following above band gap photoexcitation. © 2021, CC BY-NC-ND.

关键词： IV-VI semiconductors

来源：评论

学校读者我要写书评

暂无评论

Competing spin-orbital singlet states in the 4d4 honeycomb ruthenate Ag3LiRu2O6

引用

Physical Review Research 2022年第4期4卷 043079-043079页

作者： T. Takayama M. Blankenhorn J. Bertinshaw D. Haskel N. A. Bogdanov K. Kitagawa A. N. Yaresko A. Krajewska S. Bette G. McNally A. S. Gibbs Y. Matsumoto D. P. Sari I. Watanabe G. Fabbris W. Bi T. I. Larkin K. S. Rabinovich A. V. Boris H. Ishii H. Yamaoka T. Irifune R. Bewley C. J. Ridley C. L. Bull R. Dinnebier B. Keimer H. Takagi Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany Institute for Functional Matter and Quantum Technologies University of Stuttgart Pfaffenwaldring 57 70550 Stuttgart Germany Advanced Photon Source Argonne National Laboratory Argonne Illinois 60439 USA Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan ISIS Neutron and Muon Source STFC Rutherford Appleton Laboratory Chilton Didcot Oxon OX11 0QX United Kingdom School of Chemistry University of St Andrews St Andrews KY16 9ST United Kingdom Innovative Global Program College of Engineering Shibaura Institute of Technology Saitama 337-8570 Japan Meson Science Laboratory RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan Department of Physics University of Alabama at Birmingham Birmingham Alabama 35294 USA National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan RIKEN SPring-8 Center Sayo Hyogo 679-5148 Japan Geodynamics Research Center Ehime University Matsuyama 790-8577 Japan School of Chemistry University of Edinburgh David Brewster Road Edinburgh EH9 3FJ United Kingdom

When spin-orbit-entangled d electrons reside on a honeycomb lattice, rich quantum states are anticipated to emerge, as exemplified by the d5 Kitaev materials. Distinct yet equally intriguing physics may be realized with a d-electron count other than d5. The magnetization, Li7-nuclear magnetic resonance (NMR), and inelastic neutron scattering measurements, together with the quantum chemistry calculation, indicate that the layered ruthenate Ag3LiRu2O6 with d4Ru4+ ions at ambient pressure forms a honeycomb lattice of spin-orbit-entangled singlets, which is a playground for frustrated excitonic magnetism. Under pressure, the singlet state does not develop the expected excitonic magnetism, but two successive transitions to other nonmagnetic phases were found in Li7-NMR, neutron diffraction, and x-ray absorption fine structure measurements, first to an intermediate phase with moderate distortion of honeycomb lattice and eventually to a high-pressure phase with very short Ru-Ru dimer bonds. While the strong dimerization in the high-pressure phase originates from a molecular orbital formation as in the sister compound Li2RuO3, we argue that the intermediate phase represents a spin-orbit-coupled singlet dimer state which is stabilized by the admixture of upper-lying Jeff=1-derived states via a pseudo-Jahn-Teller effect. The emergence of competing electronic phases demonstrates rich spin-orbital physics of d4 honeycomb compounds, and this finding paves the way for realization of unconventional magnetism.

关键词： Electronic structure Magnetism Spin-orbit coupling

来源：评论

学校读者我要写书评

暂无评论

A novel √19 × √19 superstructure in epitaxially grown 1T-TaTe2

arXiv

引用

arXiv 2022年

作者： Hwang, Jinwoong Jin, Yeongrok Zhang, Canxun Zhu, Tiancong Kim, Kyoo Zhong, Yong Lee, Ji-Eun Shen, Zongqi Chen, Yi Ruan, Wei Ryu, Hyejin Hwang, Choongyu Lee, Jaekwang Crommie, Michael F. Mo, Sung-Kwan Shen, Zhi-Xun Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo ParkCA United States Geballe Laboratory for Advanced Materials Department of Physics and Applied Physics Stanford University Menlo ParkCA United States Advanced Light Source Lawrence Berkeley National Laboratory BerkeleyCA United States Department of Physics University of California BerkeleyCA United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA United States Kavli Energy NanoScience Institute University of California BerkeleyCA United States Center for Spintronics Korea Institute of Science and Technology Seoul Korea Republic of Department of Physics Fudan University Fudan China Department of Physics Pusan National University Busan Korea Republic of Quantum Matter Core-Facility Pusan National University Busan Korea Republic of Korea Atomic Energy Research Institute Daejeon Korea Republic of

The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in two-dimensional materials. We report a novel √19 × √19 charge order in few-layer thick 1T-TaTe2 transition metal dichalcogenide films grown by molecular beam epitaxy, which has not been realized. Our photoemission and scanning probe measurements demonstrate that monolayer 1T-TaTe2 exhibits a variety of metastable charge density wave orders, including the √19 × √19superstructure, which can be selectively stabilized by controlling the post-growth annealing temperature. Moreover, we find that only the √19 × √19 order persists in 1T-TaTe2 films thicker than a monolayer, up to 8 layers. Our findings identify the previously unrealized novel electronic order in a much-studied transition metal dichalcogenide and provide a viable route to control it within the epitaxial growth process. Copyright © 2022, The Authors. All rights reserved.

关键词： Scanning tunneling microscopy

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Observation of polarization density waves in SrTiO3

引用

Nature Physics 2025年 1页

作者： Gal Orenstein Viktor Krapivin Gilberto de la Peña Muñoz Ryan A. Duncan Quynh Nguyen David A. Reis Mariano Trigo Jade Stanton Yijing Huang Zhuquan Zhang Keith A. Nelson Samuel Teitelbaum Hasan Yavas Takahiro Sato Matthias C. Hoffmann Patrick Kramer Diling Zhu Jiahao Zhang Andrew M. Rappe Andrea Cavalleri Michael Först Riccardo Comin Mark P. M. Dean Ankit S. Disa Steven L. Johnson Matteo Mitrano Stanford PULSE Institute SLAC National Accelerator Laboratory Menlo Park CA USA Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park CA USA Department of Applied Physics Stanford University Stanford CA USA Department of Physics Arizona State University Tempe AZ USA Department of Physics University of Illinois at Urbana-Champaign Urbana IL USA Department of Chemistry Massachusetts Institute of Technology Cambridge MA USA Linac Coherent Light Source SLAC National Accelerator Laboratory Menlo Park CA USA Department of Materials Science and Engineering University of Pennsylvania Philadelphia PA USA Max Planck Institute for the Structure and Dynamics of Matter Hamburg Germany Department of Physics Massachusetts Institute of Technology Cambridge MA USA Condensed Matter Physics and Materials Science Department Brookhaven National Laboratory Upton NY USA School of Applied & Engineering Physics Cornell University Ithaca NY USA Institute for Quantum Electronics Physics Department ETH Zurich Zurich Switzerland SwissFEL Paul Scherrer Institut Villigen PSI Switzerland Department of Physics Harvard University Cambridge MA USA

来源：评论

学校读者我要写书评

暂无评论

A Novel √19 × √19 Superstructure in Epitaxially Grown 1T-TaTe2

引用

Advanced Materials 2022年第38期34卷

作者： Hwang, Jinwoong Jin, Yeongrok Zhang, Canxun Zhu, Tiancong Kim, Kyoo Zhong, Yong Lee, Ji-Eun Shen, Zongqi Chen, Yi Ruan, Wei Ryu, Hyejin Hwang, Choongyu Lee, Jaekwang Crommie, Michael F. Mo, Sung-Kwan Shen, Zhi-Xun Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Advanced Light Source Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Physics Pusan National University Busan46241 Korea Republic of Department of Physics University of California Berkeley BerkeleyCA94720 United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Kavli Energy NanoScience Institute University of California Berkeley BerkeleyCA94720 United States Korea Atomic Energy Research Institute Daejeon34057 Korea Republic of Department of Physics Fudan University Fudan200433 China Center for Spintronics Korea Institute of Science and Technology Seoul02792 Korea Republic of Quantum Matter Core-Facility Pusan National University Busan46241 Korea Republic of Geballe Laboratory for Advanced Materials Department of Physics and Applied Physics Stanford University Menlo ParkCA94305 United States

The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in 2D materials. A novel (Formula presented.) × (Formula presented.) charge order in few-layer-thick 1T-TaTe2 transition metal dichalcogenide films grown by molecular beam epitaxy, which has not been realized, is report. The photoemission and scanning probe measurements demonstrate that monolayer 1T-TaTe2 exhibits a variety of metastable charge density wave orders, including the (Formula presented.) × (Formula presented.) superstructure, which can be selectively stabilized by controlling the post-growth annealing temperature. Moreover, it is found that only the (Formula presented.) × (Formula presented.) order persists in 1T-TaTe2 films thicker than a monolayer, up to 8 layers. The findings identify the previously unrealized novel electronic order in a much-studied transition metal dichalcogenide and provide a viable route to control it within the epitaxial growth process. © 2022 Wiley-VCH GmbH.

关键词： Charge density waves

来源：评论

学校读者我要写书评

暂无评论

Spectroscopic fingerprint of charge order melting driven by quantum fluctuations in a cuprate (Aug, 10.1038/s41567-020-0993-7, 2020)

引用

NATURE PHYSICS 2021年第5期17卷 659-659页

作者： Lee, W. S. Zhou, Ke-Jin Hepting, M. Li, J. Nag, A. Walters, A. C. Garcia-Fernandez, M. Robarts, H. C. Hashimoto, M. Lu, H. Nosarzewski, B. Song, D. Eisaki, H. Shen, Z. X. Moritz, B. Zaanen, J. Devereaux, T. P. SLAC National Accelerator Laboratory and Stanford University Stanford Institute for Materials and Energy Sciences Menlo Park USA (GRID:grid.445003.6) (ISNI:0000 0001 0725 7771) Harwell Campus Diamond Light Source Didcot UK (GRID:grid.18785.33) (ISNI:0000 0004 1764 0696) SLAC National Accelerator Laboratory Stanford Synchrotron Radiation Lightsource Menlo Park USA (GRID:grid.445003.6) (ISNI:0000 0001 0725 7771) Stanford University Department of Physics Stanford USA (GRID:grid.168010.e) (ISNI:***) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Japan (GRID:grid.208504.b) (ISNI:0000 0001 2230 7538) SLAC National Accelerator Laboratory and Stanford University Stanford Institute for Materials and Energy Sciences Menlo Park USA (GRID:grid.445003.6) (ISNI:0000 0001 0725 7771) Stanford University Geballe Laboratory for Advanced Materials Departments of Physics and Applied Physics Stanford USA (GRID:grid.168010.e) (ISNI:***) Leiden University Instituut-Lorentz for Theoretical Physics Leiden The Netherlands (GRID:grid.5132.5) (ISNI:0000 0001 2312 1970)

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

关键词： Electronic properties and materials Phase transitions and critical phenomena Quantum fluids and solids Superconducting properties and materials

来源：评论

学校读者我要写书评

暂无评论

Layer-resolved many-electron interactions in delafossite PdCoO2 from standing-wave photoemission spectroscopy

arXiv

引用

arXiv 2021年

作者： Lu, Qiyang Martins, Henrique Kahk, J. Matthias Rimal, Gaurab Oh, Seongshik Vishik, Inna Brahlek, Matthew Chueh, William C. Lischner, Johannes Nemsak, Slavomir School of Engineering Westlake University Zhejiang Hangzhou310024 China Advanced Light Source Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Materials Science and Engineering Stanford University StanfordCA94306 United States Stanford Institute for Materials and Energy Science SLAC National Accelerator Laboratory Menlo ParkCA United States Department of Physics University of California Davis DavisCA95616 United States Department of Materials Imperial College London South Kensington Campus LondonSW7 2AZ United Kingdom Department of Physics and Astronomy Rutgers The State University of New Jersey PiscatawayNJ08854 United States Materials Science and Technology Division Oak Ridge National Laboratory Oak RidgeTN37830 United States

When a three-dimensional material is constructed by stacking different two-dimensional layers into an ordered structure, new and unique physical properties can emerge. An example is the delafossite PdCoO2, which consists of alternating layers of metallic Pd and Mott-insulating CoO2 sheets. To understand the nature of the electronic coupling between the layers that gives rise to the unique properties of PdCoO2, we revealed its layer-resolved electronic structure combining standing-wave X-ray photoemission spectroscopy and ab initio many-body calculations. Experimentally, we have decomposed the measured valence band spectrum into contributions from Pd and CoO2 layers. Computationally, we find that many-body interactions in Pd and CoO2 layers are highly different. Holes in the CoO2 layer interact strongly with charge-transfer excitons in the same layer, whereas holes in the Pd layer couple to plasmons in the Pd layer. Interestingly, we find that holes in states hybridized across both layers couple to both types of excitations (charge-transfer excitons or plasmons), with the intensity of photoemission satellites being proportional to the projection of the state onto a given layer. This establishes satellites as a sensitive probe for inter-layer hybridization. These findings pave the way towards a better understanding of complex many-electron interactions in layered quantum materials. © 2021, CC BY.

关键词： Charge transfer

来源：评论

学校读者我要写书评

暂无评论

Correction: X-ray CT observation and characterization of water transformation in heavy objects

引用

Physical chemistry chemical physics : PCCP 2020年第25期22卷 14377-14379页

作者： Satoshi Takeya Michihiro Muraoka Sanehiro Muromachi Kazuyuki Hyodo Akio Yoneyama National Metrology Institute of Japan (NMIJ) National Institute of Advanced Industrial Science and Technology (AIST) Central 5 1-1-1 Higashi Tsukuba 305-8565 Japan. s.takeya@aist.go.jp. Research Institute of Energy Frontier (RIEF) National Institute of Advanced Industrial Science and Technology (AIST) 16-1 Onogawa Tsukuba 305-8569 Japan. High Energy Accelerator Research Organization Oho Tsukuba 305-0801 Japan. SAGA Light Source 8-7 Yayoigaoka Tosu Saga 841-0005 Japan.

Correction for 'X-ray CT observation and characterization of water transformation in heavy objects' by Satoshi Takeya et al., Phys. Chem. Chem. Phys., 2020, 22, 3446-3454, DOI: 10.1039/c9cp05983k.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

引用

Physical Review Materials 2021年第6期5卷 064416-064416页

作者： I-Ting Chiu Min-Han Lee Shaobo Cheng Shenli Zhang Larry Heki Zhen Zhang Yahya Mohtashami Pavel N. Lapa Mingzhen Feng Padraic Shafer Alpha T. N'Diaye Apurva Mehta Jon A. Schuller Giulia Galli Shriram Ramanathan Yimei Zhu Ivan K. Schuller Yayoi Takamura Department of Chemical Engineering University of California Davis Davis California 95616 USA Materials Science and Engineering Program University of California San Diego La Jolla California 92093 USA Department of Physics and Center for Advanced Nanoscience University of California San Diego La Jolla California 92093 USA Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Upton New York 11973 USA Pritzker School of Molecular Engineering The University of Chicago Chicago Illinois 60637 USA Materials Department University of California Santa Barbara Santa Barbara California 93106 USA School of Materials Engineering Purdue University West Lafayette Indiana 47907 USA Department of Electrical and Computer Engineering University of California Santa Barbara Santa Barbara California 93106 USA Department of Materials Science and Engineering University of California Davis Davis California 95616 USA Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park California 94025 USA Materials Science Division and Center for Molecular Engineering Argonne National Laboratory Lemont Illinois 60439 USA

Topotactic transformations involve structural changes between related crystal structures due to a loss or gain of material while retaining a crystallographic relationship. The perovskite oxide La0.7Sr0.3CoO3 (LSCO) is an ideal system for investigating phase transformations due to its high oxygen vacancy conductivity, relatively low oxygen vacancy formation energy, and strong coupling of the magnetic and electronic properties to the oxygen stoichiometry. While the transition between cobaltite perovskite and brownmillerite (BM) phases has been widely reported, further reduction beyond the BM phase lacks systematic studies. In this paper, we study the evolution of the physical properties of LSCO thin films upon exposure to highly reducing environments. We observe the rarely reported crystalline Ruddlesden-Popper phase, which involves the loss of both oxygen anions and cobalt cations upon annealing where the cobalt is found as isolated Co ions or Co nanoparticles. First-principles calculations confirm that the concurrent loss of oxygen and cobalt ions is thermodynamically possible through an intermediary BM phase. The strong correlation of the magnetic and electronic properties to the crystal structure highlights the potential of utilizing ion migration as a basis for emerging applications such as neuromorphic computing.

关键词： Crystal defects Electrical conductivity Electronic structure of atoms & molecules Epitaxial strain First-principles calculations Magnetism Phase transitions

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：