Friedel oscillation in charge profile around superconducting vortex core

Masahiko Machida; Tomio Koyama

doi:10.1016/S0921-4534(02)02432-2

Friedel oscillation in charge profile around superconducting vortex core

Masahiko Machida, Tomio Koyama

Institute for Materials Research (IMR)

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

We numerically perform microscopic calculations for charge distributions around a superconducting vortex core on the basis of the BdG formalism including the Poisson equation for the scalar potential. The numerical results reveal that the charge distribution shows the Friedel oscillation around a vortex core and the oscillation survives over the coherence length in small k_Fξ cases, i.e. the quantum limit. To clarify the origin of the oscillation we study the charge screening properties by calculating the charge density correlation function around a vortex core. The correlation function strongly depends on the position from the vortex center and remarkably oscillates around the vortex core. This result indicates that the Thomas-Fermi type screening is broken in the vortex core.

Original language	English
Pages (from-to)	659-660
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02432-2
Publication status	Published - 2003 May 1
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

Charge screening
Friedel oscillation
Vortex charge profile

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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title = "Friedel oscillation in charge profile around superconducting vortex core",

abstract = "We numerically perform microscopic calculations for charge distributions around a superconducting vortex core on the basis of the BdG formalism including the Poisson equation for the scalar potential. The numerical results reveal that the charge distribution shows the Friedel oscillation around a vortex core and the oscillation survives over the coherence length in small kFξ cases, i.e. the quantum limit. To clarify the origin of the oscillation we study the charge screening properties by calculating the charge density correlation function around a vortex core. The correlation function strongly depends on the position from the vortex center and remarkably oscillates around the vortex core. This result indicates that the Thomas-Fermi type screening is broken in the vortex core.",

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AU - Machida, Masahiko

AU - Koyama, Tomio

PY - 2003/5/1

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N2 - We numerically perform microscopic calculations for charge distributions around a superconducting vortex core on the basis of the BdG formalism including the Poisson equation for the scalar potential. The numerical results reveal that the charge distribution shows the Friedel oscillation around a vortex core and the oscillation survives over the coherence length in small kFξ cases, i.e. the quantum limit. To clarify the origin of the oscillation we study the charge screening properties by calculating the charge density correlation function around a vortex core. The correlation function strongly depends on the position from the vortex center and remarkably oscillates around the vortex core. This result indicates that the Thomas-Fermi type screening is broken in the vortex core.

AB - We numerically perform microscopic calculations for charge distributions around a superconducting vortex core on the basis of the BdG formalism including the Poisson equation for the scalar potential. The numerical results reveal that the charge distribution shows the Friedel oscillation around a vortex core and the oscillation survives over the coherence length in small kFξ cases, i.e. the quantum limit. To clarify the origin of the oscillation we study the charge screening properties by calculating the charge density correlation function around a vortex core. The correlation function strongly depends on the position from the vortex center and remarkably oscillates around the vortex core. This result indicates that the Thomas-Fermi type screening is broken in the vortex core.

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KW - Friedel oscillation

KW - Vortex charge profile

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