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

Research output: Contribution to journalArticlepeer-review

195 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1582-1586
Number of pages5
Issue number6127
StatePublished - Mar 29 2013

All Science Journal Classification (ASJC) codes

  • General


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