Unusual dependence of vortex core states on the superconducting gap in Bi₂Sr₂CaCu₂O_8+δ

2001/05/28 by B. W. Hoogenboom, Bart W. Hoogenboom, Hoogenboom, B. W. +11
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0105528

4 pages, 4 eps figures

arxiv created 2001/05/28 · openalex publication_date 2001/05/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present a scanning tunneling spectroscopy study on quasiparticle states in vortex cores in Bi₂Sr₂CaCu₂O_8+δ. The energy of the observed vortex core states shows an approximately linear scaling with the superconducting gap in the region just outside the core. This clearly distinguishes them from conventional localized core states, and is a signature of the mechanism responsible for their discrete appearance in high-temperature superconductors. The energy scaling of the vortex core states also suggests a common nature of vortex cores in Bi₂Sr₂CaCu₂O_8+δ and YBa₂Cu₃O_7-δ. Finally, the observed vortex core states do not show any dependence on the applied magnetic field in the range from 1 to 6 T.

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