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Title: A New Magnetic Topological Quantum Material Candidate by Design

Abstract

Magnetism, when combined with an unconventional electronic band structure, can give rise to forefront electronic properties such as the quantum anomalous Hall effect, axion electrodynamics, and Majorana fermions. Here we report the characterization of high-quality crystals of EuSn 2P 2, a new quantum material specifically designed to engender unconventional electronic states plus magnetism. EuSn 2P 2 has a layered, Bi 2Te 3-type structure. Ferromagnetic interactions dominate the Curie–Weiss susceptibility, but a transition to antiferromagnetic ordering occurs near 30 K. Neutron diffraction reveals that this is due to two-dimensional ferromagnetic spin alignment within individual Eu layers and antiferromagnetic alignment between layers—this magnetic state surrounds the Sn–P layers at low temperatures. The bulk electrical resistivity is sensitive to the magnetism. Electronic structure calculations reveal that EuSn 2P 2 might be a strong topological insulator, which can be a new magnetic topological quantum material (MTQM) candidate. The calculations show that surface states should be present, and they are indeed observed by angle-resolved photoelectron spectroscopy (ARPES) measurements.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [5]; ORCiD logo [7];  [8];  [9]; ORCiD logo [1];  [6]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Princeton Univ., NJ (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. National Cheng Kung Univ., Tainan City (Taiwan)
  5. Peking Univ., Beijing (China)
  6. Princeton Univ., NJ (United States)
  7. National Cheng Kung Univ., Tainan City (Taiwan); Center for Quantum Frontiers of Research & Technology (QFort), Tainan City (Taiwan)
  8. Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1507803
Alternate Identifier(s):
OSTI ID: 1508839
Grant/Contract Number:  
AC05-00OR22725; KC0402010
Resource Type:
Published Article
Journal Name:
ACS Central Science
Additional Journal Information:
Journal Name: ACS Central Science; Journal ID: ISSN 2374-7943
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Gui, Xin, Pletikosic, Ivo, Cao, Huibo, Tien, Hung-Ju, Xu, Xitong, Zhong, Ruidan, Wang, Guangqiang, Chang, Tay-Rong, Jia, Shuang, Valla, Tonica, Xie, Weiwei, and Cava, Robert J. A New Magnetic Topological Quantum Material Candidate by Design. United States: N. p., 2019. Web. doi:10.1021/acscentsci.9b00202.
Gui, Xin, Pletikosic, Ivo, Cao, Huibo, Tien, Hung-Ju, Xu, Xitong, Zhong, Ruidan, Wang, Guangqiang, Chang, Tay-Rong, Jia, Shuang, Valla, Tonica, Xie, Weiwei, & Cava, Robert J. A New Magnetic Topological Quantum Material Candidate by Design. United States. doi:10.1021/acscentsci.9b00202.
Gui, Xin, Pletikosic, Ivo, Cao, Huibo, Tien, Hung-Ju, Xu, Xitong, Zhong, Ruidan, Wang, Guangqiang, Chang, Tay-Rong, Jia, Shuang, Valla, Tonica, Xie, Weiwei, and Cava, Robert J. Fri . "A New Magnetic Topological Quantum Material Candidate by Design". United States. doi:10.1021/acscentsci.9b00202.
@article{osti_1507803,
title = {A New Magnetic Topological Quantum Material Candidate by Design},
author = {Gui, Xin and Pletikosic, Ivo and Cao, Huibo and Tien, Hung-Ju and Xu, Xitong and Zhong, Ruidan and Wang, Guangqiang and Chang, Tay-Rong and Jia, Shuang and Valla, Tonica and Xie, Weiwei and Cava, Robert J.},
abstractNote = {Magnetism, when combined with an unconventional electronic band structure, can give rise to forefront electronic properties such as the quantum anomalous Hall effect, axion electrodynamics, and Majorana fermions. Here we report the characterization of high-quality crystals of EuSn2P2, a new quantum material specifically designed to engender unconventional electronic states plus magnetism. EuSn2P2 has a layered, Bi2Te3-type structure. Ferromagnetic interactions dominate the Curie–Weiss susceptibility, but a transition to antiferromagnetic ordering occurs near 30 K. Neutron diffraction reveals that this is due to two-dimensional ferromagnetic spin alignment within individual Eu layers and antiferromagnetic alignment between layers—this magnetic state surrounds the Sn–P layers at low temperatures. The bulk electrical resistivity is sensitive to the magnetism. Electronic structure calculations reveal that EuSn2P2 might be a strong topological insulator, which can be a new magnetic topological quantum material (MTQM) candidate. The calculations show that surface states should be present, and they are indeed observed by angle-resolved photoelectron spectroscopy (ARPES) measurements.},
doi = {10.1021/acscentsci.9b00202},
journal = {ACS Central Science},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acscentsci.9b00202

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