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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 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.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [5]; ORCiD logo [7];  [8];  [9]; ORCiD logo [1];  [6]
+ Show Author Affiliations
  1. Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
  2. Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States
  3. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
  4. Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
  5. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, People’s Republic of China
  6. Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
  7. Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan, Center for Quantum Frontiers of Research & Technology (QFort), Tainan 701, Taiwan
  8. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, People’s Republic of China, Collaborative Innovation Center of Quantum Matter, Beijing 100871, People’s Republic of China, CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
  9. Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States
Publication Date:
Research Org.:
Princeton Univ., NJ (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1507803
Alternate Identifier(s):
OSTI ID: 1515834; OSTI ID: 1558479
Grant/Contract Number:  
AC05-00OR22725; KC0402010
Resource Type:
Published Article
Journal Name:
ACS Central Science
Additional Journal Information:
Journal Name: ACS Central Science Journal Volume: 5 Journal Issue: 5; Journal ID: ISSN 2374-7943
Publisher:
American Chemical Society
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.
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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. https://doi.org/10.1021/acscentsci.9b00202
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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. https://doi.org/10.1021/acscentsci.9b00202.
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@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 = 5,
volume = 5,
place = {United States},
year = {Fri Apr 19 00:00:00 EDT 2019},
month = {Fri Apr 19 00:00:00 EDT 2019}
}
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Journal Article:
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https://doi.org/10.1021/acscentsci.9b00202
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Cited by: 46 works
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Figures / Tables:

Figure 1 Figure 1: Crystal structure of EuSn2P2 from different viewpoints, where the green, gray, and red balls represent Eu, Sn, and P atoms, respectively. (A) Single crystal picture of EuSn2P2. (B, C) Layered characteristic structure of EuSn2P2 (looking perpendicular to the caxis). (D) Emphasizing the honeycomb character of the double Snmore » layers in the basal plane and the triangular planes of Eu (looking parallel to the $c$-axis).« less
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