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Title: Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet

Abstract

We report that in iron-based superconductors, both nematic and magnetic fluctuations are expected to enhance superconductivity and may originate from a quantum critical point hidden beneath the superconducting dome. The behavior of the nonsuperconducting state can be an important piece of the puzzle, motivating, in this paper, the use of high magnetic fields to suppress superconductivity and measure the nematic susceptibility of the normal state at low temperatures. We describe experimental advances which make it possible to measure a resistive gauge factor (which is a proxy for the nematic susceptibility) in the field-induced normal state in a 65 T pulsed magnet, and report measurements of the gauge factor of a micromachined single crystal of Ba(Fe 0.926Co 0.074) 2As 2 at temperatures down to 1.2 K. Finally, the nematic susceptibility increases monotonically in the field-induced normal state as the temperature decreases, consistent with the presence of a quantum critical point nearby in composition.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3];  [1]
  1. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Florida State Univ., Tallahassee, FL (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1570651
Report Number(s):
LA-UR-19-27888
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
89233218CNA000001; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 12; 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

Straquadine, Joshua Alan, Palmstrom, Johanna C., Walmsley, Philip, Histrov, A. T., Weickert, Dagmar Franziska, Balakirev, Fedor Fedorovich, Jaime, Marcelo, Mcdonald, Ross David, and Fisher, Ian R. Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.125147.
Straquadine, Joshua Alan, Palmstrom, Johanna C., Walmsley, Philip, Histrov, A. T., Weickert, Dagmar Franziska, Balakirev, Fedor Fedorovich, Jaime, Marcelo, Mcdonald, Ross David, & Fisher, Ian R. Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet. United States. doi:10.1103/PhysRevB.100.125147.
Straquadine, Joshua Alan, Palmstrom, Johanna C., Walmsley, Philip, Histrov, A. T., Weickert, Dagmar Franziska, Balakirev, Fedor Fedorovich, Jaime, Marcelo, Mcdonald, Ross David, and Fisher, Ian R. Mon . "Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet". United States. doi:10.1103/PhysRevB.100.125147.
@article{osti_1570651,
title = {Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet},
author = {Straquadine, Joshua Alan and Palmstrom, Johanna C. and Walmsley, Philip and Histrov, A. T. and Weickert, Dagmar Franziska and Balakirev, Fedor Fedorovich and Jaime, Marcelo and Mcdonald, Ross David and Fisher, Ian R.},
abstractNote = {We report that in iron-based superconductors, both nematic and magnetic fluctuations are expected to enhance superconductivity and may originate from a quantum critical point hidden beneath the superconducting dome. The behavior of the nonsuperconducting state can be an important piece of the puzzle, motivating, in this paper, the use of high magnetic fields to suppress superconductivity and measure the nematic susceptibility of the normal state at low temperatures. We describe experimental advances which make it possible to measure a resistive gauge factor (which is a proxy for the nematic susceptibility) in the field-induced normal state in a 65 T pulsed magnet, and report measurements of the gauge factor of a micromachined single crystal of Ba(Fe0.926Co0.074)2As2 at temperatures down to 1.2 K. Finally, the nematic susceptibility increases monotonically in the field-induced normal state as the temperature decreases, consistent with the presence of a quantum critical point nearby in composition.},
doi = {10.1103/PhysRevB.100.125147},
journal = {Physical Review B},
number = 12,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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