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Title: Switching dynamics of the spin density wave in superconducting CeCoIn 5

Abstract

The ordering wave vector Q of a spin density wave (SDW), stabilized within the superconducting state of CeCoIn 5 in a high magnetic field, has been shown to be hypersensitive to the direction of the field. Q can be switched from a nodal direction of the d-wave superconducting order parameter to a perpendicular node by rotating the in-plane magnetic field through the antinodal direction within a fraction of a degree. In this paper, we address the dynamics of the switching of Q. We use a free-energy functional based on the magnetization density, which describes the condensation of magnetic fluctuations of nodal quasiparticles, and show that the switching process includes closing of the SDW gap at one Q and then reopening the SDW gap at another Q perpendicular to the first one. The magnetic field couples to Q through the spin-orbit interaction. Our calculations show that the width of the hysteretic region of switching depends linearly on the deviation of magnetic field from the critical field associated with the SDW transition, consistent with our thermal conductivity measurements. Finally, the agreement between theory and experiment supports our scenario of the hypersensitivity of the Q phase on the direction of magnetic field, asmore » well as the magnon condensation as the origin of the SDW phase in CeCoIn 5.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. 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 Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1374328
Alternate Identifier(s):
OSTI ID: 1365434
Report Number(s):
LA-UR-17-20699
Journal ID: ISSN 2469-9950; TRN: US1702784
Grant/Contract Number:
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; 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; Material Science

Citation Formats

Kim, Duk Y., Lin, Shi-Zeng, Bauer, Eric D., Ronning, Filip, Thompson, J. D., and Movshovich, Roman. Switching dynamics of the spin density wave in superconducting CeCoIn5. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.241110.
Kim, Duk Y., Lin, Shi-Zeng, Bauer, Eric D., Ronning, Filip, Thompson, J. D., & Movshovich, Roman. Switching dynamics of the spin density wave in superconducting CeCoIn5. United States. doi:10.1103/PhysRevB.95.241110.
Kim, Duk Y., Lin, Shi-Zeng, Bauer, Eric D., Ronning, Filip, Thompson, J. D., and Movshovich, Roman. Wed . "Switching dynamics of the spin density wave in superconducting CeCoIn5". United States. doi:10.1103/PhysRevB.95.241110.
@article{osti_1374328,
title = {Switching dynamics of the spin density wave in superconducting CeCoIn5},
author = {Kim, Duk Y. and Lin, Shi-Zeng and Bauer, Eric D. and Ronning, Filip and Thompson, J. D. and Movshovich, Roman},
abstractNote = {The ordering wave vector Q of a spin density wave (SDW), stabilized within the superconducting state of CeCoIn5 in a high magnetic field, has been shown to be hypersensitive to the direction of the field. Q can be switched from a nodal direction of the d-wave superconducting order parameter to a perpendicular node by rotating the in-plane magnetic field through the antinodal direction within a fraction of a degree. In this paper, we address the dynamics of the switching of Q. We use a free-energy functional based on the magnetization density, which describes the condensation of magnetic fluctuations of nodal quasiparticles, and show that the switching process includes closing of the SDW gap at one Q and then reopening the SDW gap at another Q perpendicular to the first one. The magnetic field couples to Q through the spin-orbit interaction. Our calculations show that the width of the hysteretic region of switching depends linearly on the deviation of magnetic field from the critical field associated with the SDW transition, consistent with our thermal conductivity measurements. Finally, the agreement between theory and experiment supports our scenario of the hypersensitivity of the Q phase on the direction of magnetic field, as well as the magnon condensation as the origin of the SDW phase in CeCoIn5.},
doi = {10.1103/PhysRevB.95.241110},
journal = {Physical Review B},
number = 24,
volume = 95,
place = {United States},
year = {Wed Jun 21 00:00:00 EDT 2017},
month = {Wed Jun 21 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 21, 2018
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Cited by: 2works
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