Observing periodic gap variations in cuprates

作     者：Riju Banerjee Emily L. Wang Eric W. Hudson 

作者机构：National Physical Laboratory Teddington TW11 0LW United Kingdom Department of Physics The Pennsylvania State University University Park Pennsylvania 16802 USA Department of Computer Science Northwestern University Evanston Illinois 60201 USA 

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

年 卷 期：2024年第110卷第22期

页      面：224501-224501页

核心收录：

基　　金：Pennsylvania State University, PSU National Physical Laboratory, NPL 

主　　题：FFLO Pseudogap Superconductivity Strongly correlated systems Scanning tunneling microscopy 

摘      要：The presence of multiple orders in strongly correlated electronic materials like the cuprate superconductors, coupled with spatial inhomogeneity, poses a challenge to the interpretation of spectroscopic data taken on them. Here, we present a technique that directly acknowledges these orders and inhomogeneities and extracts statistically significant features from such data. Applying this technique to scanning tunneling spectroscopy measurements from single and bilayer cuprates spanning a wide doping range, we peer through local inhomogeneities and identify a gaplike feature that breaks translational and rotational symmetries and varies periodically in a fourfold pattern. This identification of spectral features aligns well with theoretical predictions of spatially modulated pair density.