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Linear and field-independent relation between vortex core state energy and gap in Bi2Sr2CaCu2O8+d

Renner, C; Hoogenboom, BW; Kadowaki, K; Revaz, B; Li, M; Fischer, O; (2001) Linear and field-independent relation between vortex core state energy and gap in Bi2Sr2CaCu2O8+d. Physical Review Letters , 87 (26) , Article 267001. 10.1103/PhysRevLett.87.267001. Green open access

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Abstract

We present a scanning tunneling spectroscopy study on quasiparticle states in vortex cores in Bi2Sr2CaCu2O8+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 Bi2Sr2CaCu2O8+δ and YBa2Cu3O7-δ. Finally, these states do not show any dependence on the applied magnetic field between 1 and 6 T.

Type: Article
Title: Linear and field-independent relation between vortex core state energy and gap in Bi2Sr2CaCu2O8+d
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.87.267001
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.87.267001
Additional information: © 2001 The American Physical Society
Keywords: Linear, field-independent, relation, vortex, core, state, energy, gap, Bi2Sr2CaCu2O8+d
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/37582
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