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Title: Local nematic susceptibility in stressed BaFe 2 As 2 from NMR electric field gradient measurements

Abstract

The electric field gradient (EFG) tensor at the 75As site couples to the orbital occupations of the As p orbitals and is a sensitive probe of local nematicity in BaFe2As2. We use nuclear magnetic resonance to measure the nuclear quadrupolar splittings and find that the EFG asymmetry responds linearly to the presence of a strain field in the paramagnetic phase. We extract the nematic susceptibility from the slope of this linear response as a function of temperature and find that it diverges near the structural transition, in agreement with other measures of the bulk nematic susceptibility. Our work establishes an alternative method to extract the nematic susceptibility which, in contrast to transport methods, can be extended inside the superconducting state.

Authors:
 [1];  [2];  [1];  [1];  [3];  [3];  [3];  [3];  [3];  [4];  [1];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of California, Davis, CA (United States). Dept. of Physics
  2. TU Dresden, Dresden (Germany). Inst. for Solid State Physics
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  4. Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); German Research Foundation (DFG)
OSTI Identifier:
1415857
Alternate Identifier(s):
OSTI ID: 1414039; OSTI ID: 1464798
Report Number(s):
IS-J-9544
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1800860
Grant/Contract Number:  
DMR-1506961; DMR-1607139; NA0002908; SC0012336; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 24; 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; antiferromagnetism; high-temperature superconductors; nuclear quadrupole resonance

Citation Formats

Kissikov, T., Sarkar, R., Lawson, M., Bush, B. T., Timmons, E. I., Tanatar, M. A., Prozorov, R., Bud'ko, S. L., Canfield, P. C., Fernandes, R. M., Goh, W. F., Pickett, W. E., and Curro, N. J. Local nematic susceptibility in stressed BaFe2As2 from NMR electric field gradient measurements. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.241108.
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Kissikov, T., Sarkar, R., Lawson, M., Bush, B. T., Timmons, E. I., Tanatar, M. A., Prozorov, R., Bud'ko, S. L., Canfield, P. C., Fernandes, R. M., Goh, W. F., Pickett, W. E., & Curro, N. J. Local nematic susceptibility in stressed BaFe2As2 from NMR electric field gradient measurements. United States. https://doi.org/10.1103/PhysRevB.96.241108
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Kissikov, T., Sarkar, R., Lawson, M., Bush, B. T., Timmons, E. I., Tanatar, M. A., Prozorov, R., Bud'ko, S. L., Canfield, P. C., Fernandes, R. M., Goh, W. F., Pickett, W. E., and Curro, N. J. Tue . "Local nematic susceptibility in stressed BaFe2As2 from NMR electric field gradient measurements". United States. https://doi.org/10.1103/PhysRevB.96.241108. https://www.osti.gov/servlets/purl/1415857.
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@article{osti_1415857,
title = {Local nematic susceptibility in stressed BaFe2As2 from NMR electric field gradient measurements},
author = {Kissikov, T. and Sarkar, R. and Lawson, M. and Bush, B. T. and Timmons, E. I. and Tanatar, M. A. and Prozorov, R. and Bud'ko, S. L. and Canfield, P. C. and Fernandes, R. M. and Goh, W. F. and Pickett, W. E. and Curro, N. J.},
abstractNote = {The electric field gradient (EFG) tensor at the 75As site couples to the orbital occupations of the As p orbitals and is a sensitive probe of local nematicity in BaFe2As2. We use nuclear magnetic resonance to measure the nuclear quadrupolar splittings and find that the EFG asymmetry responds linearly to the presence of a strain field in the paramagnetic phase. We extract the nematic susceptibility from the slope of this linear response as a function of temperature and find that it diverges near the structural transition, in agreement with other measures of the bulk nematic susceptibility. Our work establishes an alternative method to extract the nematic susceptibility which, in contrast to transport methods, can be extended inside the superconducting state.},
doi = {10.1103/PhysRevB.96.241108},
journal = {Physical Review B},
number = 24,
volume = 96,
place = {United States},
year = {Tue Dec 19 00:00:00 EST 2017},
month = {Tue Dec 19 00:00:00 EST 2017}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevB.96.241108
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Citation Metrics:
Cited by: 12 works
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Figures / Tables:

FIG. 1 FIG. 1: Field-swept spectra of BaFe2As2 at constant frequency $\mathcal{f}$ = 55.924 MHz at 138 K for several different displacements of the piezoelectric device, showing the central and upper satellite transitions. Zero strain corresponds to 51.58 µm. Inset: Orientation of the crystal with respect to the external field, $\mathrm{H}$0, themore » strain axis, and the rf field $\mathrm{H}$1. In this paper, $\mathcal{x}$ and $\mathcal{y}$ are parallel to the Fe-Fe directions.« less
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