Revealing the topological phase diagram of ZrTe_(5) using the complex strain fields of microbubbles

作     者：Zoltán Tajkov Dániel Nagy Konrád Kandrai János Koltai LászlóOroszlány Péter Süle Zsolt EHorváth Péter Vancsó Levente Tapasztó Péter Nemes-Incze 

作者机构：Centre for Energy ResearchInstitute of Technical Physics and Materials Science1121BudapestHungary Department of Physics of Complex SystemsELTE Eötvös Loránd University1117BudapestHungary ELTE Eötvös Loránd UniversityDepartment of Biological Physics1117BudapestHungary Budapest University of Technology and Economics1111BudapestHungary 

出 版 物：《npj Computational Materials》 (计算材料学（英文）)

年 卷 期：2022年第8卷第1期

页      面：1685-1691页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：The work was conducted within the framework of the Topology in Nanomaterials Lendulet project,Grant No.LP2017-9/2017 with support from the European H2020 GrapheneCore3 Project No.881603 Financial support fromÉlvonal Grant KKP 138144,NKFIH OTKA grant K132869 and TKP20121 NKPA grant is also acknowledged P.V.and L.O.acknowledge the support of the Janos Bolyai Research Scholarship the Bolyai+Scholarship of the Hungarian Academy of Sciences L.O.acknowledges financial support from NKFIH OTKA grant FK124723 and K131938 L.O.and J.K.acknowledges the support from the Ministry of Innovation and Technology for the Quantum Information National Laboratory 

主　　题：density topological invariant 

摘      要：Topological materials host robust properties,unaffected by microscopic perturbations,owing to the global topological properties of the bulk electron *** in which the topological invariant can be changed by easily tuning external parameters are especially sought *** pentatelluride(ZrTe_(5))is one of a few experimentally available materials that reside close to the boundary of a topological phase transition,allowing the switching of its invariant by mechanical ***,we unambiguously identify a topological insulator–metal transition as a function of strain,by a combination of ab initio calculations and direct measurements of the local charge *** model quantitatively describes the response to complex strain patterns found in bubbles of few layer ZrTe_(5) without fitting parameters,reproducing the mechanical deformation-dependent closing of the band gap observed using scanning tunneling *** calculate the topological phase diagram of ZrTe_(5) and identify the phase at equilibrium,enabling the design of device architectures,which exploit the topological switching characteristics of the system.