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Title: Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe 1 - x Co x ) 2 As 2

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [1]
  1. Univ. of Buenos Aires, Buenos Aires, (Argentina)
  2. Univ. of Buenos Aires, Buenos Aires, (Argentina); Univ. of La Plata, La Plata, (Argentina)
  3. Max Planck Society, Dresden (Germany). Max Planck Inst. for the Physics of Complex Systems
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  5. Univ. of Illinois, Urbana, IL (United States)

Evidence of nematic effects in the mixed superconducting phase of slightly underdoped Ba ( Fe1 - x Cox)2As2 is reported. We have found strong in-plane resistivity anisotropy for crystals in different strain conditions. For these compositions, there is no magnetic long-range order, so the description may be ascribed to the interplay between the superconducting and nematic order parameters. A piezoelectric-based apparatus is used to apply tensile or compressive strain to tune nematic domain orientation in order to examine intrinsic nematicity. Measurements are done under a rotating magnetic field, and the analysis of the angular dependence of physical quantities identifies the cases in which the sample is detwinned. Furthermore, the angular dependence of the data allows us to evaluate the effects of nematicity on the in-plane superconductor stiffness. Our results show that although nematicity contributes in a decisive way to the conduction properties, its contributions to the anisotropy properties of the stiffness of the superconducting order parameter is not as significant in these samples.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
DMR 1725401; AC02-07CH11358
OSTI ID:
1498711
Alternate ID(s):
OSTI ID: 1497253
Report Number(s):
IS-J-9848; PRBMDO
Journal Information:
Physical Review B, Vol. 99, Issue 6; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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