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Title: Thermodynamic signatures for the existence of Dirac electrons in ZrTe 5

Abstract

We combine transport, magnetization, and torque magnetometry measurements to investigate the electronic structure of ZrTe 5 and its evolution with temperature. At fields beyond the quantum limit, we observe a magnetization reversal from paramagnetic to diamagnetic response, which is characteristic of a Dirac semi-metal. We also observe a strong non-linearity in the magnetization that suggests the presence of additional low-lying carriers from other low-energy bands. Finally, we observe a striking sensitivity of the magnetic reversal to temperature that is not readily explained by simple band-structure models, but may be connected to a temperature dependent Lifshitz transition proposed to exist in this material.

Authors:
 [1];  [2];  [3];  [4];  [5];  [2];  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  2. Univ. of Texas, Austin, TX (United States). Dept. of Physics
  3. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  5. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Univ. of California, Berkeley, CA (United States). Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1398514
Alternate Identifier(s):
OSTI ID: 1417698
Grant/Contract Number:  
AC02-05CH11231; AC02-05-CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Nair, Nityan L., Dumitrescu, Philipp T., Channa, Sanyum, Griffin, Sinead M., Neaton, Jeffrey B., Potter, Andrew C., and Analytis, James G. Thermodynamic signatures for the existence of Dirac electrons in ZrTe5. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.97.041111.
Nair, Nityan L., Dumitrescu, Philipp T., Channa, Sanyum, Griffin, Sinead M., Neaton, Jeffrey B., Potter, Andrew C., & Analytis, James G. Thermodynamic signatures for the existence of Dirac electrons in ZrTe5. United States. doi:10.1103/PhysRevB.97.041111.
Nair, Nityan L., Dumitrescu, Philipp T., Channa, Sanyum, Griffin, Sinead M., Neaton, Jeffrey B., Potter, Andrew C., and Analytis, James G. Tue . "Thermodynamic signatures for the existence of Dirac electrons in ZrTe5". United States. doi:10.1103/PhysRevB.97.041111. https://www.osti.gov/servlets/purl/1398514.
@article{osti_1398514,
title = {Thermodynamic signatures for the existence of Dirac electrons in ZrTe5},
author = {Nair, Nityan L. and Dumitrescu, Philipp T. and Channa, Sanyum and Griffin, Sinead M. and Neaton, Jeffrey B. and Potter, Andrew C. and Analytis, James G.},
abstractNote = {We combine transport, magnetization, and torque magnetometry measurements to investigate the electronic structure of ZrTe5 and its evolution with temperature. At fields beyond the quantum limit, we observe a magnetization reversal from paramagnetic to diamagnetic response, which is characteristic of a Dirac semi-metal. We also observe a strong non-linearity in the magnetization that suggests the presence of additional low-lying carriers from other low-energy bands. Finally, we observe a striking sensitivity of the magnetic reversal to temperature that is not readily explained by simple band-structure models, but may be connected to a temperature dependent Lifshitz transition proposed to exist in this material.},
doi = {10.1103/PhysRevB.97.041111},
journal = {Physical Review B},
number = 4,
volume = 97,
place = {United States},
year = {2017},
month = {9}
}

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Works referenced in this record:

Experimental observation of the quantum Hall effect and Berry's phase in graphene
journal, November 2005

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