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Title: Pressure dependence of Ce valence in CeRhIn5

Abstract

We have studied the Ce valence as a function of pressure in CeRhIn5 at 300 K and at 22 K using x-ray absorption spectroscopy in partial fluorescent yield mode. At room temperature, we found no detectable change in Ce valence greater than 0.01 up to a pressure of 5.5 GPa. At 22 K, the valence remains robust against pressure below 6 GPa, in contrast to the predicted valence crossover at P = 2.35 GPa. In conclusion, this work yields an upper limit for the change in Ce-valence and suggests that the critical valence fluctuation scenario, in its current form, is unlikely.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [3];  [3];  [2];  [4];  [2]
  1. Univ. of California, Davis, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of California, Davis, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1415561
Report Number(s):
LLNL-JRNL-691879
Journal ID: ISSN 0953-8984; TRN: US1800838
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 30; Journal Issue: 3; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; heavy-fermion; superconductivity; x-ray spectroscopy

Citation Formats

Brubaker, Z. E., Stillwell, R. L., Chow, P., Xiao, Y., Kenney-Benson, C., Ferry, R., Jenei, Z., Zieve, R. J., and Jeffries, J. R. Pressure dependence of Ce valence in CeRhIn5. United States: N. p., 2017. Web. doi:10.1088/1361-648X/aa9e2b.
Brubaker, Z. E., Stillwell, R. L., Chow, P., Xiao, Y., Kenney-Benson, C., Ferry, R., Jenei, Z., Zieve, R. J., & Jeffries, J. R. Pressure dependence of Ce valence in CeRhIn5. United States. doi:10.1088/1361-648X/aa9e2b.
Brubaker, Z. E., Stillwell, R. L., Chow, P., Xiao, Y., Kenney-Benson, C., Ferry, R., Jenei, Z., Zieve, R. J., and Jeffries, J. R. Thu . "Pressure dependence of Ce valence in CeRhIn5". United States. doi:10.1088/1361-648X/aa9e2b. https://www.osti.gov/servlets/purl/1415561.
@article{osti_1415561,
title = {Pressure dependence of Ce valence in CeRhIn5},
author = {Brubaker, Z. E. and Stillwell, R. L. and Chow, P. and Xiao, Y. and Kenney-Benson, C. and Ferry, R. and Jenei, Z. and Zieve, R. J. and Jeffries, J. R.},
abstractNote = {We have studied the Ce valence as a function of pressure in CeRhIn5 at 300 K and at 22 K using x-ray absorption spectroscopy in partial fluorescent yield mode. At room temperature, we found no detectable change in Ce valence greater than 0.01 up to a pressure of 5.5 GPa. At 22 K, the valence remains robust against pressure below 6 GPa, in contrast to the predicted valence crossover at P = 2.35 GPa. In conclusion, this work yields an upper limit for the change in Ce-valence and suggests that the critical valence fluctuation scenario, in its current form, is unlikely.},
doi = {10.1088/1361-648X/aa9e2b},
journal = {Journal of Physics. Condensed Matter},
number = 3,
volume = 30,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure-1 Figure-1: Absorption Spectra at (a) T=300 K and (b) T=22 K for CeRhIn5 as a function of pressure. Each spectrum is offset by 0.25. The pre-edge feature, *, develops significant fluctuations when measured with the cryostat in place, which are likely artifacts of the experimental setup. The P=6 GPa spectrummore » at T=22 K reveals a subtle increase at 5.738 keV, which has been interpreted as the f0 peak.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.