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Title: Nuclear magnetic resonance studies of pseudospin fluctuations in URu 2 Si 2

Abstract

Here, we report 29Si nuclear magnetic resonance measurements in single crystals and aligned powders of URu 2Si 2 in the hidden order and paramagnetic phases. The spin-lattice relaxation data reveal evidence of pseudospin fluctuations of U moments in the paramagnetic phase. We find evidence for partial suppression of the density of states below 30 K and analyze the data in terms of a two-component spin-fermion model. We propose that this behavior is a realization of a pseudogap between the hidden-order transition T HO and 30 K. This behavior is then compared to other materials that demonstrate precursor fluctuations in a pseudogap regime above a ground state with long-range order.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [3];  [3];  [2];  [4];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of California, San Diego, La Jolla, CA (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); NORDITA, Stockholm (Sweden)
Publication Date:
Research Org.:
Univ. of California, Davis, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1329380
Grant/Contract Number:  
FG52-09NA29464
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 88; Journal Issue: 9; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Shirer, K. R., Haraldsen, J. T., Dioguardi, A. P., Crocker, J., apRoberts-Warren, N., Shockley, A. C., Lin, C. -H., Nisson, D. M., Cooley, J. C., Janoschek, M., Huang, K., Kanchanavatee, N., Maple, M. B., Graf, M. J., Balatsky, A. V., and Curro, N. J. Nuclear magnetic resonance studies of pseudospin fluctuations in URu2Si2. United States: N. p., 2013. Web. doi:10.1103/PhysRevB.88.094436.
Shirer, K. R., Haraldsen, J. T., Dioguardi, A. P., Crocker, J., apRoberts-Warren, N., Shockley, A. C., Lin, C. -H., Nisson, D. M., Cooley, J. C., Janoschek, M., Huang, K., Kanchanavatee, N., Maple, M. B., Graf, M. J., Balatsky, A. V., & Curro, N. J. Nuclear magnetic resonance studies of pseudospin fluctuations in URu2Si2. United States. doi:10.1103/PhysRevB.88.094436.
Shirer, K. R., Haraldsen, J. T., Dioguardi, A. P., Crocker, J., apRoberts-Warren, N., Shockley, A. C., Lin, C. -H., Nisson, D. M., Cooley, J. C., Janoschek, M., Huang, K., Kanchanavatee, N., Maple, M. B., Graf, M. J., Balatsky, A. V., and Curro, N. J. Thu . "Nuclear magnetic resonance studies of pseudospin fluctuations in URu2Si2". United States. doi:10.1103/PhysRevB.88.094436. https://www.osti.gov/servlets/purl/1329380.
@article{osti_1329380,
title = {Nuclear magnetic resonance studies of pseudospin fluctuations in URu2Si2},
author = {Shirer, K. R. and Haraldsen, J. T. and Dioguardi, A. P. and Crocker, J. and apRoberts-Warren, N. and Shockley, A. C. and Lin, C. -H. and Nisson, D. M. and Cooley, J. C. and Janoschek, M. and Huang, K. and Kanchanavatee, N. and Maple, M. B. and Graf, M. J. and Balatsky, A. V. and Curro, N. J.},
abstractNote = {Here, we report 29Si nuclear magnetic resonance measurements in single crystals and aligned powders of URu2Si2 in the hidden order and paramagnetic phases. The spin-lattice relaxation data reveal evidence of pseudospin fluctuations of U moments in the paramagnetic phase. We find evidence for partial suppression of the density of states below 30 K and analyze the data in terms of a two-component spin-fermion model. We propose that this behavior is a realization of a pseudogap between the hidden-order transition THO and 30 K. This behavior is then compared to other materials that demonstrate precursor fluctuations in a pseudogap regime above a ground state with long-range order.},
doi = {10.1103/PhysRevB.88.094436},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 9,
volume = 88,
place = {United States},
year = {2013},
month = {9}
}

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