Muon spin rotation studies of electronic excitations and magnetism in the vortex cores of superconductors

2007/10/11 by J. E. Sonier · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Delocalized electron #Magnetism #Muon spin spectroscopy #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Superconductivity #Superconductivity in MgB2 and Alloys #Type-II superconductor #Vortex #Vortex state #cond-mat.supr-con

paper · pdf · doi:10.1088/0034-4885/70/11/r01

published as Reports on Progress in Physics 70, 1717-1755 (2007) · 28 pages, 22 figures

openalex publication_date 2007/10/11 · arxiv created 2008/02/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The focus of this paper is on recent progress in muon spin rotation (µSR) studies of the vortex cores in type-II superconductors. By comparison of µSR measurements of the vortex core size in a variety of materials with results from techniques that directly probe electronic states, the effect of delocalized quasiparticles on the spatial variation of field in a lattice of interacting vortices has been determined for both single-band and multi-band superconductors. These studies demonstrate the remarkable accuracy of what some still consider an exotic technique. In recent years µSR has also been used to search for magnetism in and around the vortex cores of high-temperature superconductors. As a local probe µSR is specially suited for detecting static or quasistatic magnetism having short-range or random spatial correlations. As discussed in this review, µSR experiments support a generic phase diagram of competing superconducting and magnetic order parameters, characterized by a quantum phase transition to a state where the competing order is spatially nonuniform.

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Cited by

• Comparison of different methods for analyzing μSR line shapes in the vortex state of type-II superconductors