Zeeman splitting and dynamical mass generation in Dirac semimetal ZrTe5

Liu, Yanwen and Yuan, Xiang and Zhang, Cheng and Jin, Zhao and Narayan, Awadhesh and Luo, Chen and Chen, Zhigang ORCID: https://orcid.org/0000-0002-9309-7993 and Yang, Lei and Zou, Jin and Wu, Xing and Sanvito, Stefano and Xia, Zhengcai and Li, Liang and Wang, Zhong and Xiu, Faxian (2016) Zeeman splitting and dynamical mass generation in Dirac semimetal ZrTe5. Nature Communications, 7 (12516). pp. 1-9.

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Dirac semimetals have attracted extensive attentions in recent years. It has been theoretically suggested that many-body interactions may drive exotic phase transitions, spontaneously generating a Dirac mass for the nominally massless Dirac electrons. So far, signature of interaction-driven transition has been lacking. In this work, we report high-magnetic-field transport measurements of the Dirac semimetal candidate ZrTe5. Owing to the large g factor in ZrTe5, the Zeeman splitting can be observed at magnetic field as low as 3 T. Most prominently, high pulsed magnetic field up to 60 T drives the system into the ultra-quantum limit, where we observe abrupt changes in the magnetoresistance, indicating field-induced phase transitions. This is interpreted as an interaction-induced spontaneous mass generation of the Dirac fermions, which bears resemblance to the dynamical mass generation of nucleons in high-energy physics. Our work establishes Dirac semimetals as ideal platforms for investigating emerging correlation effects in topological matters.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 13 Jun 2017 03:28
Last Modified: 27 Jun 2017 04:15
Uncontrolled Keywords: correlation; magnetic field; phase transition; physical property; physics; quantum mechanics; bear; fermion; magnetic field; nucleon; phase transition; physics
Fields of Research (2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340399 Macromolecular and materials chemistry not elsewhere classified
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: https://doi.org/10.1038/ncomms12516
URI: http://eprints.usq.edu.au/id/eprint/31664

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