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Title: Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe

Journal Article · · Physical Review B
 [1];  [1];  [1];  [2];  [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Karlsruhe Inst. of Technology (KIT) (Germany). Inst. of Solid State Physics
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

The study of the iron-based superconductor FeSe has blossomed with the availability of high-quality single crystals, obtained through flux/vapor-transport growth techniques below the structural transformation temperature of its tetragonal phase, T≈450°C. Here, we report on the variation of sample morphology and properties due to small modifications in the growth conditions. A considerable variation of the superconducting transition temperature Tc, from 8.8 K to 3 K, which cannot be correlated with the sample composition, is observed. Instead, we point out a clear correlation between Tc and disorder, as measured by the residual resistivity ratio. Notably, the tetragonal-to-orthorhombic structural transition is also found to be quite strongly disorder dependent (Ts≈72–90K) and linearly correlated with Tc.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1326844
Alternate ID(s):
OSTI ID: 1275981
Report Number(s):
IS-J-9077; PRBMDO
Journal Information:
Physical Review B, Vol. 94, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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In‐situ Electrochemical X‐ray Diffraction: A Rigorous Method to Navigate within Phase Diagrams Reveals β‐Fe 1+ x Se as Superconductor for All x journal October 2019
Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe journal September 2016
Quenched nematic criticality and two superconducting domes in an iron-based superconductor journal October 2019
Unusual effects of Be doping in the iron-based superconductor FeSe journal October 2018
New materials physics journal November 2019
Anisotropic grain-boundary effect on electronic transport in superconducting FeSe thin films journal January 2019
Majority carrier type inversion in the FeSe family and a ‘doped semimetal’ scheme in iron-based superconductors journal May 2019
Imaging anisotropic vortex dynamics in FeSe journal July 2019
Robustness of superconducting properties to transition metal substitution and impurity phases in Fe 1 − x V x Se journal September 2019
Lattice dynamics in FeSe via inelastic x-ray scattering and first-principles calculations journal January 2020
Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe journal September 2016
Discovery of orbital-selective Cooper pairing in FeSe journal July 2017
Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure text January 2017
Suppression of electronic correlations by chemical pressure from FeSe to FeS text January 2017
Flux growth in a horizontal configuration: an analogue to vapor transport growth text January 2017
NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure text January 2017
Majority carrier type inversion in FeSe family and "doped semimetal" scheme in iron-based superconductors text January 2018
Unusual Effects of Be doping in the Iron Based Superconductor FeSe text January 2018