Evidence of Electronic Phase Separation in the Strongly Correlated Semiconductor YbB_(12)  

作　　者：A.Azarevich N.Bolotina O.Khrykina A.Bogach E.Zhukova B.Gorshunov A.Melentev Z.Bedran A.Alyabyeva M.Belyanchikov V.Voronov N.Yu.Shitsevalova V.B.Filipov N.Sluchanko 

机构地区：[1]Prokhorov General Physics Institute of the Russian Academy of Sciences,Vavilov Str.38,Moscow 119991,Russia [2]Shubnikov Institute of Crystallography,Federal Scientific Research Centre‘Crystallography and Photonics’of Russian Academy of Sciences,59 Leninskiy Prospect,Moscow 119333,Russia [3]Center for Photonics and 2D Materials,Moscow Institute of Physics and Technology(National Research University),141700 Dolgoprudny,Moscow Region,Russia [4]Institute for Problems of Materials Science,NASU,Krzhizhanovsky Str.3,03142 Kyiv,Ukraine

出　　处：《Chinese Physics Letters》2022年第12期65-70,共6页中国物理快报（英文版）

基　　金：support of the Russian Science Foundation(Grant No.22-22-00243)。

摘　　要：We investigate high-quality single-domain crystals of YbB_(12)using the precise x-ray diffraction technique in combination with the low-temperature polarized THz–infrared spectroscopy and accurate magnetotransport measurements.It is shown for the first time that this archetypal strongly correlated system with a metal-insulator transition to a mysterious dielectric ground state with a metal Fermi surface[Science 362,65(2018)and ibid 362,32(2018)]is actually a heterogeneous compound in the regime of electronic phase separation.Changes in the configuration of the discovered dynamic charge stripes are proposed upon cooling.As a result,a conclusion is drawn in favor of a crossover between different patterns of the filamentary electronic structure penetrating the semiconducting matrix of YbB_(12).We argue that the discovery of stripes in YbB_(12)is fundamental,elucidating the nature of exotic dielectric state in Kondo insulators.

关 键 词：INSULATOR KONDO DIELECTRIC 

分 类 号：O469[理学—凝聚态物理]