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Title: Uniaxial pressure effect on the magnetic ordered moment and transition temperatures in BaFe 2 - x T x As 2 ( T = Co , Ni )

Journal Article · · Physical Review B
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [2];  [2];  [2];  [4];  [5];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12] more »;  [5];  [8];  [8];  [2];  [13] « less
  1. Rice Univ., Houston, TX (United States)
  2. Columbia Univ., New York, NY (United States)
  3. Beijing Normal Univ. (China)
  4. Japan Atomic Energy Agency (JAEA), Tokai (Japan)
  5. McMaster Univ., Hamilton, ON (Canada)
  6. Zhejiang Univ., Hangzhou (China)
  7. Univ. of Tokyo (Japan)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  9. TRIUMF, Vancouver, BC (Canada)
  10. Inst. Laue-Langevin (ILL), Grenoble (France)
  11. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  12. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  13. Rice Univ., Houston, TX (United States); Beijing Normal Univ. (China)

In this paper, we use neutron diffraction and muon spin relaxation to study the effect of in-plane uniaxial pressure on the antiferromagnetic (AF) orthorhombic phase in BaFe2As2 and its Co- and Ni-substituted members near optimal superconductivity. In the low-temperature AF ordered state, uniaxial pressure necessary to detwin the orthorhombic crystals also increases the magnetic ordered moment, reaching an 11% increase under 40 MPa for BaFe1.9Co0.1As2, and a 15% increase for BaFe1.915Ni0.085As2. We also observe an increase of the AF ordering temperature (TN) of about 0.25 K/MPa in all compounds, consistent with density functional theory calculations that reveal better Fermi surface nesting for itinerant electrons under uniaxial pressure. Finally, the doping dependence of the magnetic ordered moment is captured by combining dynamical mean field theory with density functional theory, suggesting that the pressure-induced moment increase near optimal superconductivity is closely related to quantum fluctuations and the nearby electronic nematic phase.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Robert A. Welch Foundation (United States); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China
Grant/Contract Number:
AC05-00OR22725; DMR-1362219; DMR-1436006; DMR-1308603; DMR-1610633; DMR-1436095; C-1839; 11674030; 2016YFA0302300
OSTI ID:
1394391
Alternate ID(s):
OSTI ID: 1344188
Journal Information:
Physical Review B, Vol. 95, Issue 6; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (5)

c-axis pressure-induced antiferromagnetic order in optimally P-doped BaFe2(As0.70P0.30)2 superconductor journal September 2018
Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned Ba ( Fe 1 x Co x ) 2 As 2 journal October 2019
Uniaxial c -axis pressure effects on the underdoped superconductor BaFe 2 ( As 0.72 P 0.28 ) 2 journal January 2020
Spin Waves in Detwinned BaFe 2 As 2 journal August 2018
High-K dielectric sulfur-selenium alloys journal May 2019