Unconventional gap structures and the intermediate mixed state: A vortex lattice study of the noncentrosymmetric superconductor BiPd

We report on neutron scattering measurements on the vortex lattice of the noncentrosymmetric superconductor BiPd. We observe the existence of the intermediate mixed state, a region where Meissner and vortex lattice phases coexist, which is a feature of low <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>κ</a:mi></a:math> type-II superconductors. Following this, we obtain an estimate of the value of <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>κ</b:mi></b:math> using the extended London model. Finally, we find that the temperature dependence of the vortex lattice form factor fits well to a model designed to describe singlet-triplet mixing in noncentrosymmetric superconductors, which may shed light on the question of the gap structure in BiPd.

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Journal
Physical review. B./Physical review. B
Published
2025-03-13
DOI
https://doi.org/10.1103/physrevb.111.094514
Primary Topic
Rare-earth and actinide compounds
Type
article
Field-Weighted Citation Impact
0.00

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article

Unconventional gap structures and the intermediate mixed state: A vortex lattice study of the noncentrosymmetric superconductor BiPd

L. Lemberger, J. L. Gavilano, Yuriy Yerin, C. D. Dewhurst et al.
Physical review. B./Physical review. B
Rare-earth and actinide compounds
article

Unconventional gap structures and the intermediate mixed state: A vortex lattice study of the noncentrosymmetric superconductor BiPd

L. Lemberger, J. L. Gavilano, Yuriy Yerin, C. D. Dewhurst, E. M. Forgan, A. T. Holmes, A. S. Cameron, Bhanu Joshi, S. Ramakrishnan, E. Blackburn, R. Riyat, A. D. Hillier
article en

Abstract

We report on neutron scattering measurements on the vortex lattice of the noncentrosymmetric superconductor BiPd. We observe the existence of the intermediate mixed state, a region where Meissner and vortex lattice phases coexist, which is a feature of low <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>κ</a:mi></a:math> type-II superconductors. Following this, we obtain an estimate of the value of <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>κ</b:mi></b:math> using the extended London model. Finally, we find that the temperature dependence of the vortex lattice form factor fits well to a model designed to describe singlet-triplet mixing in noncentrosymmetric superconductors, which may shed light on the question of the gap structure in BiPd.

Physical review. B./Physical review. BVol. 111(9)
Guru Gobind Singh Indraprastha University (IN), Tata Institute of Fundamental Research (IN), Lund University (SE), European Spallation Source (SE), Paul Scherrer Institute (CH), Superconducting and other Innovative Materials and Devices Institute (IT), China Spallation Neutron Source (CN), Institut Laue-Langevin (FR), ISIS Neutron and Muon Source, Technische Universität Dresden (DE), University of Birmingham (GB)
University of Birmingham, Paul Scherrer Institut, Engineering and Physical Sciences Research Council
Openalex Percentile: Top 97%
Rare-earth and actinide compounds
DOIOpen Access PDFOpenAlex
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