Signatures of dephasing by mirror-symmetry breaking in weak-antilocalization magnetoresistance across the topological transition in Pb1-xSnxSe

被引：9

作者：

Kazakov, Alexander ^{[1
]}

Brzezicki, Wojciech ^{[1
,2
]}

Hyart, Timo ^{[1
,3
]}

Turowski, Bartlomiej ^{[1
]}

Polaczynski, Jakub ^{[1
]}

Adamus, Zbigniew ^{[4
]}

Aleszkiewicz, Marta ^{[4
]}

Wojciechowski, Tomasz ^{[1
]}

Domagala, Jaroslaw Z. ^{[4
]}

Caha, Ondrej ^{[5
]}

Varykhalov, Andrei ^{[6
]}

Springholz, Gunther ^{[7
]}

Wojtowicz, Tomasz ^{[1
]}

Volobuev, Valentine V. ^{[1
,8
]}

Dietl, Tomasz ^{[1
,9
]}

机构：

[1] Polish Acad Sci, Int Res Ctr MagTop, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland

[2] Jagiellonian Univ, Inst Theoret Phys, Ulica S Lojasiewicza 11, PL-30348 Krakow, Poland

[3] Aalto Univ, Dept Appl Phys, FI-00076 Espoo, Finland

[4] Polish Acad Sci, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland

[5] Masaryk Univ, Fac Sci, Dept Condensed Matter Phys, Kotlarska 2, CZ-61137 Brno, Czech Republic

[6] Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany

[7] Johannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenbergerstr 69, A-4040 Linz, Austria

[8] Natl Tech Univ KhPI, Kyrpychova Str 2, UA-61002 Kharkiv, Ukraine

[9] Tohoku Univ, WPI Adv Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 24期

基金：

奥地利科学基金会;

关键词：

BI2SE3; THIN-FILMS; CRYSTALLINE INSULATOR; QUANTUM OSCILLATIONS; PHASE-TRANSITION; TRANSPORT; LOCALIZATION; STATES; METAL;

D O I：

10.1103/PhysRevB.103.245307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Many conductors, including recently studied Dirac materials, show saturation of coherence length on decreasing temperature. This surprising phenomenon is assigned to external noise, residual magnetic impurities, or two-level systems specific to noncrystalline solids. Here, by considering the SnTe-class of compounds as an example, we show theoretically that breaking of mirror symmetry deteriorates Berry's phase quantization, leading to additional dephasing in weak-antilocalization magnetoresistance (WAL-MR). Our experimental studies of WAL-MR corroborate these theoretical expectations in (111) Pb1-xSnxSe thin film with Sn contents x corresponding to both topological crystalline insulator and topologically trivial phases. In particular, we find the shortening of the phase coherence length in samples with intentionally broken mirror symmetry. Our results indicate that the classification of quantum transport phenomena into universality classes should encompass, in addition to time-reversal and spin-rotation invariances, spatial symmetries in specific systems.

引用

页数：12

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