Quasi-particle spectrum of giant vortex states in a square nanoscopic superconducting plate

H. Suematsu; M. Kato; M. Machida; Tomio Koyama; T. Ishida

doi:10.1016/j.physc.2007.04.301

Quasi-particle spectrum of giant vortex states in a square nanoscopic superconducting plate

H. Suematsu, M. Kato, M. Machida, Tomio Koyama, T. Ishida

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We have investigated quasi-particle structure and superconducting state of the nano-scaled superconductor under an external magnetic field using a microscopic Bogoliubov-de Gennes equation. Our results show that the giant vortex state has a peak of local density of states at the center of the vortex core in negative energy, while the singly quantized vortex has it in positive energy. This may be observable for scanning tunneling spectroscopy experiments.

Original language	English
Pages (from-to)	262-265
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.04.301
Publication status	Published - 2007 Oct 1

Keywords

Bogoliubov-de Gennes equation
Giant vortex state
Nano-scale superconductor
Quasi-particle spectrum

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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AU - Suematsu, H.

AU - Kato, M.

AU - Machida, M.

AU - Koyama, Tomio

AU - Ishida, T.

PY - 2007/10/1

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AB - We have investigated quasi-particle structure and superconducting state of the nano-scaled superconductor under an external magnetic field using a microscopic Bogoliubov-de Gennes equation. Our results show that the giant vortex state has a peak of local density of states at the center of the vortex core in negative energy, while the singly quantized vortex has it in positive energy. This may be observable for scanning tunneling spectroscopy experiments.

KW - Bogoliubov-de Gennes equation

KW - Giant vortex state

KW - Nano-scale superconductor

KW - Quasi-particle spectrum

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