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Title: Muon spin rotation in heavy-electron pauli-limit superconductors

Abstract

The formalism for analyzing the magnetic field distribution in the vortex lattice of Pauli-limit heavy-electron superconductors is applied to the evaluation of the vortex lattice static linewidth relevant to the muon spin rotation ({mu}SR) experiment. Based on the Ginzburg-Landau expansion for the superconductor free energy, we study the evolution with respect to the external field of the static linewidth both in the limit of independent vortices (low magnetic field) with a variational expression for the order parameter and in the near H{sub c2}{sup P}(T) regime with an extension of the Abrikosov analysis to Pauli-limit superconductors. We conclude that in the Ginzburg-Landau regime in the Pauli-limit, anomalous variations of the static linewidth with the applied field are predicted as a result of the superconductor spin response around a vortex core that dominates the usual charge-response screening supercurrents. We propose the effect as a benchmark for studying new puzzling vortex lattice properties recently observed in CeCoIn{sub 5}.

Authors:
 [1]
  1. INAC/SPSMS, Commissariat a l'Energie Atomique (France)
Publication Date:
OSTI Identifier:
22069266
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 115; Journal Issue: 5; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BENCHMARKS; CERIUM; COBALT; ELECTRONS; FREE ENERGY; GINZBURG-LANDAU THEORY; INDIUM; INTERMETALLIC COMPOUNDS; MAGNETIC FIELDS; MUON SPIN RELAXATION; ORDER PARAMETERS; SPIN; SUPERCONDUCTORS; VARIATIONAL METHODS; VORTICES

Citation Formats

Michal, V. P., E-mail: vincent.michal@cea.fr. Muon spin rotation in heavy-electron pauli-limit superconductors. United States: N. p., 2012. Web. doi:10.1134/S1063776112110076.
Michal, V. P., E-mail: vincent.michal@cea.fr. Muon spin rotation in heavy-electron pauli-limit superconductors. United States. doi:10.1134/S1063776112110076.
Michal, V. P., E-mail: vincent.michal@cea.fr. Thu . "Muon spin rotation in heavy-electron pauli-limit superconductors". United States. doi:10.1134/S1063776112110076.
@article{osti_22069266,
title = {Muon spin rotation in heavy-electron pauli-limit superconductors},
author = {Michal, V. P., E-mail: vincent.michal@cea.fr},
abstractNote = {The formalism for analyzing the magnetic field distribution in the vortex lattice of Pauli-limit heavy-electron superconductors is applied to the evaluation of the vortex lattice static linewidth relevant to the muon spin rotation ({mu}SR) experiment. Based on the Ginzburg-Landau expansion for the superconductor free energy, we study the evolution with respect to the external field of the static linewidth both in the limit of independent vortices (low magnetic field) with a variational expression for the order parameter and in the near H{sub c2}{sup P}(T) regime with an extension of the Abrikosov analysis to Pauli-limit superconductors. We conclude that in the Ginzburg-Landau regime in the Pauli-limit, anomalous variations of the static linewidth with the applied field are predicted as a result of the superconductor spin response around a vortex core that dominates the usual charge-response screening supercurrents. We propose the effect as a benchmark for studying new puzzling vortex lattice properties recently observed in CeCoIn{sub 5}.},
doi = {10.1134/S1063776112110076},
journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 5,
volume = 115,
place = {United States},
year = {2012},
month = {11}
}