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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1498711
Alternate Identifier(s):
OSTI ID: 1497253
Report Number(s):
IS-J-9848
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
DMR 1725401; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; 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; 36 MATERIALS SCIENCE

Citation Formats

Schmidt, J., Bekeris, V., Lozano, G. S., Bortulé, M. V., Bermúdez, M. Marziali, Hicks, C. W., Canfield, P. C., Fradkin, E., and Pasquini, G. Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1-xCox)2As2. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.064515.
Schmidt, J., Bekeris, V., Lozano, G. S., Bortulé, M. V., Bermúdez, M. Marziali, Hicks, C. W., Canfield, P. C., Fradkin, E., & Pasquini, G. Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1-xCox)2As2. United States. doi:10.1103/PhysRevB.99.064515.
Schmidt, J., Bekeris, V., Lozano, G. S., Bortulé, M. V., Bermúdez, M. Marziali, Hicks, C. W., Canfield, P. C., Fradkin, E., and Pasquini, G. Thu . "Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1-xCox)2As2". United States. doi:10.1103/PhysRevB.99.064515. https://www.osti.gov/servlets/purl/1498711.
@article{osti_1498711,
title = {Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1-xCox)2As2},
author = {Schmidt, J. and Bekeris, V. and Lozano, G. S. and Bortulé, M. V. and Bermúdez, M. Marziali and Hicks, C. W. and Canfield, P. C. and Fradkin, E. and Pasquini, G.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.99.064515},
journal = {Physical Review B},
number = 6,
volume = 99,
place = {United States},
year = {2019},
month = {2}
}

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