Selection rules for one- and two-photon absorption by excitons in carbon nanotubes

作     者：Eduardo B. Barros Rodrigo B. Capaz Ado Jorio Georgii G. Samsonidze Antonio G. Souza Filho Sohrab Ismail-Beigi Catalin D. Spataru Steven G. Louie Gene Dresselhaus Mildred S. Dresselhaus 

作者机构：Departamento de Física Universidade Federal do Ceará Fortaleza Ceará CEP 60455-760 Brazil Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139-4307 USA Instituto de Física Universidade Federal do Rio de Janeiro Caixa Postal 68528 Rio de Janeiro Rio de Janeiro 21941-972 Brazil Divisão de Metrologia de Materiais Instituto Nacional de Metrologia Normalização e Qualidade Industrial—Inmetro R. Nossa Senhora das Graças 50 Xerém Duque de Caxias Rio de Janeiro 25245-020 Brazil Departamento de Física Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais 30123-970 Brazil Department of Applied Physics Yale University New Haven Connecticut 06520 USA Department of Physics University of California at Berkeley Berkeley California 94720 USA Materials Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Francis Bitter Magnet Laboratory Massachusetts Institute of Technology Cambridge Massachusetts 02139-4307 USA 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2006年第73卷第24期

页      面：241406(R)-241406(R)页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

摘      要：Recent optical absorption and emission experiments showed that the lower energy optical transitions in carbon nanotubes are excitonic in nature, as predicted by theory. These experiments were based on the symmetry aspects of free electron-hole states and bound excitonic states. The present work shows, however, that group theory does not predict the selection rules needed to explain the two photon experiments. We obtain the symmetries and selection rules for the optical transitions of excitons in single-wall carbon nanotubes within the approach of the group of the wave vector, thus providing important information for the interpretation of theoretical and experimental optical spectra of these materials.