Topology-driven magnetic quantum phase transition in topological insulators

Jinsong Zhang; Cui Zu Chang; Peizhe Tang; Zuocheng Zhang; Xiao Feng; Kang Li; Li Li Wang; Xi Chen; Chaoxing Liu; Wenhui Duan; Ke He; Qi Kun Xue; Xucun Ma; Yayu Wang

doi:10.1126/science.1230905

Topology-driven magnetic quantum phase transition in topological insulators

Jinsong Zhang, Cui Zu Chang, Peizhe Tang, Zuocheng Zhang, Xiao Feng, Kang Li, Li Li Wang, Xi Chen, Chaoxing Liu, Wenhui Duan, Ke He, Qi Kun Xue, Xucun Ma, Yayu Wang

Physics

Research output: Contribution to journal › Article › peer-review

211 Scopus citations

Abstract

The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observed a magnetic quantum phase transition in Cr-doped Bi₂(Se_xTe_1-x) ₃ topological insulator films grown by means of molecular beam epitaxy. Across the critical point, a topological quantum phase transition is revealed through both angle-resolved photoemission measurements and density functional theory calculations. We present strong evidence that the bulk band topology is the fundamental driving force for the magnetic quantum phase transition. The tunable topological and magnetic properties in this system are well suited for realizing the exotic topological quantum phenomena in magnetic topological insulators.

Original language	English (US)
Pages (from-to)	1582-1586
Number of pages	5
Journal	Science
Volume	340
Issue number	6127
DOIs	https://doi.org/10.1126/science.1230905
State	Published - Mar 29 2013

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title = "Topology-driven magnetic quantum phase transition in topological insulators",

abstract = "The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observed a magnetic quantum phase transition in Cr-doped Bi2(SexTe1-x) 3 topological insulator films grown by means of molecular beam epitaxy. Across the critical point, a topological quantum phase transition is revealed through both angle-resolved photoemission measurements and density functional theory calculations. We present strong evidence that the bulk band topology is the fundamental driving force for the magnetic quantum phase transition. The tunable topological and magnetic properties in this system are well suited for realizing the exotic topological quantum phenomena in magnetic topological insulators.",

author = "Jinsong Zhang and Chang, {Cui Zu} and Peizhe Tang and Zuocheng Zhang and Xiao Feng and Kang Li and Wang, {Li Li} and Xi Chen and Chaoxing Liu and Wenhui Duan and Ke He and Xue, {Qi Kun} and Xucun Ma and Yayu Wang",

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month = mar,

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doi = "10.1126/science.1230905",

language = "English (US)",

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T1 - Topology-driven magnetic quantum phase transition in topological insulators

AU - Zhang, Jinsong

AU - Chang, Cui Zu

AU - Tang, Peizhe

AU - Zhang, Zuocheng

AU - Feng, Xiao

AU - Li, Kang

AU - Wang, Li Li

AU - Chen, Xi

AU - Liu, Chaoxing

AU - Duan, Wenhui

AU - He, Ke

AU - Xue, Qi Kun

AU - Ma, Xucun

AU - Wang, Yayu

PY - 2013/3/29

Y1 - 2013/3/29

N2 - The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observed a magnetic quantum phase transition in Cr-doped Bi2(SexTe1-x) 3 topological insulator films grown by means of molecular beam epitaxy. Across the critical point, a topological quantum phase transition is revealed through both angle-resolved photoemission measurements and density functional theory calculations. We present strong evidence that the bulk band topology is the fundamental driving force for the magnetic quantum phase transition. The tunable topological and magnetic properties in this system are well suited for realizing the exotic topological quantum phenomena in magnetic topological insulators.

AB - The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observed a magnetic quantum phase transition in Cr-doped Bi2(SexTe1-x) 3 topological insulator films grown by means of molecular beam epitaxy. Across the critical point, a topological quantum phase transition is revealed through both angle-resolved photoemission measurements and density functional theory calculations. We present strong evidence that the bulk band topology is the fundamental driving force for the magnetic quantum phase transition. The tunable topological and magnetic properties in this system are well suited for realizing the exotic topological quantum phenomena in magnetic topological insulators.

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Topology-driven magnetic quantum phase transition in topological insulators

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