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Title: Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity

Abstract

In this paper, we use neutron diffraction to study the structure and magnetic phase diagram of the newly discovered pressure-induced superconductor CrAs. Unlike most magnetic unconventional superconductors where the magnetic moment direction barely changes upon doping, here we show that CrAs exhibits a spin reorientation from the ab plane to the ac plane, along with an abrupt drop of the magnetic propagation vector at a critical pressure (Pc ≈ 0.6 GPa). This magnetic phase transition, accompanied by a lattice anomaly, coincides with the emergence of bulk superconductivity. With further increasing pressure, the magnetic order completely disappears near the optimal Tc regime (P ≈ 0.94 GPa). Moreover, the Cr magnetic moments tend to be aligned antiparallel between nearest neighbors with increasing pressure toward the optimal superconductivity regime. Finally, our findings suggest that the noncollinear helimagnetic order is strongly coupled to structural and electronic degrees of freedom, and that the antiferromagnetic correlations between nearest neighbors might be essential for superconductivity.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [2];  [2];  [4];  [5];  [6]
+ Show Author Affiliations
  1. Fudan Univ., Shanghai (China). Dept. of Physics. State Key Lab. of Surface Physics
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research; Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Science Division
  5. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics; Purdue Univ., West Lafayette, IN (United States). Dept. of Physics
  6. Fudan Univ., Shanghai (China). Dept. of Physics. State Key Lab. of Surface Physics. Collaborative Innovation Center of Advanced Microstructures
Publication Date:
Research Org.:
Fudan Univ., Shanghai (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology (China); Shanghai Pujiang Scholar Program (China)
Contributing Org.:
Univ. of Maryland, College Park, MD (United States); Chinese Academy of Sciences (CAS), Beijing (China); Purdue Univ., West Lafayette, IN (United States)
OSTI Identifier:
1361298
Alternate Identifier(s):
OSTI ID: 1236539
Grant/Contract Number:  
AC05-00OR22725; 91421106; 11374059; 2015CB921302; 13PJ1401100
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Shen, Yao, Wang, Qisi, Hao, Yiqing, Pan, Bingying, Feng, Yu, Huang, Qingzhen, Harriger, L. W., Leao, J. B., Zhao, Yang, Chisnell, R. M., Lynn, J. W., Cao, Huibo, Hu, Jiangping, and Zhao, Jun. Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.060503.
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Shen, Yao, Wang, Qisi, Hao, Yiqing, Pan, Bingying, Feng, Yu, Huang, Qingzhen, Harriger, L. W., Leao, J. B., Zhao, Yang, Chisnell, R. M., Lynn, J. W., Cao, Huibo, Hu, Jiangping, & Zhao, Jun. Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity. United States. https://doi.org/10.1103/PhysRevB.93.060503
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Shen, Yao, Wang, Qisi, Hao, Yiqing, Pan, Bingying, Feng, Yu, Huang, Qingzhen, Harriger, L. W., Leao, J. B., Zhao, Yang, Chisnell, R. M., Lynn, J. W., Cao, Huibo, Hu, Jiangping, and Zhao, Jun. Mon . "Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity". United States. https://doi.org/10.1103/PhysRevB.93.060503. https://www.osti.gov/servlets/purl/1361298.
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@article{osti_1361298,
title = {Structural and magnetic phase diagram of CrAs and its relationship with pressure-induced superconductivity},
author = {Shen, Yao and Wang, Qisi and Hao, Yiqing and Pan, Bingying and Feng, Yu and Huang, Qingzhen and Harriger, L. W. and Leao, J. B. and Zhao, Yang and Chisnell, R. M. and Lynn, J. W. and Cao, Huibo and Hu, Jiangping and Zhao, Jun},
abstractNote = {In this paper, we use neutron diffraction to study the structure and magnetic phase diagram of the newly discovered pressure-induced superconductor CrAs. Unlike most magnetic unconventional superconductors where the magnetic moment direction barely changes upon doping, here we show that CrAs exhibits a spin reorientation from the ab plane to the ac plane, along with an abrupt drop of the magnetic propagation vector at a critical pressure (Pc ≈ 0.6 GPa). This magnetic phase transition, accompanied by a lattice anomaly, coincides with the emergence of bulk superconductivity. With further increasing pressure, the magnetic order completely disappears near the optimal Tc regime (P ≈ 0.94 GPa). Moreover, the Cr magnetic moments tend to be aligned antiparallel between nearest neighbors with increasing pressure toward the optimal superconductivity regime. Finally, our findings suggest that the noncollinear helimagnetic order is strongly coupled to structural and electronic degrees of freedom, and that the antiferromagnetic correlations between nearest neighbors might be essential for superconductivity.},
doi = {10.1103/PhysRevB.93.060503},
journal = {Physical Review B},
number = 6,
volume = 93,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 2016},
month = {Mon Feb 01 00:00:00 EST 2016}
}
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https://doi.org/10.1103/PhysRevB.93.060503
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    Works referencing / citing this record:

    Spiral magnetic order and pressure-induced superconductivity in transition metal compounds
    journal, October 2016

    • Wang, Yishu; Feng, Yejun; Cheng, J. -G.
    • Nature Communications, Vol. 7, Issue 1
    • DOI: 10.1038/ncomms13037

    Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs
    journal, September 2015

    • Khasanov, Rustem; Guguchia, Zurab; Eremin, Ilya
    • Scientific Reports, Vol. 5, Issue 1
    • DOI: 10.1038/srep13788

    Raman scattering study of lattice and magnetic excitations in CrAs
    journal, September 2019

    Magnetic ground state of KCr 3 As 3
    journal, May 2019

    Multiple band crossings and Fermi surface topology: Role of double nonsymmorphic symmetries in MnP-type crystal structures
    journal, September 2019

    Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs
    text, January 2015

    Raman scattering study of lattice and magnetic excitations in CrAs
    text, January 2019

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