Signatures of topological phase transitions in higher Landau levels of HgTe/CdTe quantum wells from an information theory perspective

被引：3

作者：

Calixto, Manuel ^{[1
,2
]}

Cordero, Nicolas A. ^{[2
,3
,4
]}

Romera, Elvira ^{[2
,5
]}

Castanos, Octavio ^{[6
]}

机构：

[1] Univ Granada, Dept Matemat Aplicada, Fuentenueva s n, Granada 18071, Spain

[2] Univ Granada, Inst Carlos I Fis Teor & Comp, Fuentenueva s n, Granada 18071, Spain

[3] Univ Burgos, Dept Fis, Burgos, Spain

[4] Univ Burgos, Int Ctr Crit Raw Mat ICCRAM, Burgos, Spain

[5] Univ Granada, Dept Fis Atom Mol & Nucl, Fuentenueva s n, Granada 18071, Spain

[6] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70 543, Mexico City 04510, Mexico

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2022年 / 605卷

关键词：

Topological phases; 2D Dirac materials; Landau levels; Information theory; SPIN; CONJECTURE; PROOF; STATE;

D O I：

10.1016/j.physa.2022.128057

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the structure of low energy Hamiltonian eigenstates in zincblende heterostructures (like HgTe/CdTe quantum wells) near the gamma point, under magnetic fields, to characterize topological phase transitions (TPT) under an information-theoretic perspective. Using information markers like entanglement, quantum fluctuations, fidelity susceptibility, participation ration, area in phase space, etc., we realize that higher Landau levels (LL) feel the topological phase transition slightly displaced with regard to the edge state, thus leading to the concept of "higher Landau level vertical bar n vertical bar > 0 TPT", as "echoes" of the standard edge state n = 0 TPT. We compute the critical magnetic field and the critical HgTe layer thickness at which these information measures of higher Landau levels undergo a structural change. (C) 2022 The Author(s). Published by Elsevier B.V.

引用

页数：15