Scanning tunneling spectroscopy of a vortex core from the clean to the dirty limit

Ch Renner; A. D. Kent; Ph Niedermann; Fischer; F. Lévy

doi:10.1103/PhysRevLett.67.1650

Scanning tunneling spectroscopy of a vortex core from the clean to the dirty limit

Ch Renner, A. D. Kent, Ph Niedermann, Fischer, F. Lévy

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

Abstract

The local density of states of a superconducting vortex core has been measured as a function of disorder in the alloy system Nb1-xTaxSe2 using a low-temperature scanning tunneling microscope. The peak observed in the zero-bias conductance at a vortex center is found to be very sensitive to disorder. As the mean free path is decreased by substitutional alloying the peak gradually disappears and for x=0.2 the density of states in the vortex center is found to be equal to that in the normal state. The vortex-core spectra hence may provide a sensitive measure of the quasiparticle scattering time.

Original language	English (US)
Pages (from-to)	1650-1652
Number of pages	3
Journal	Physical Review Letters
Volume	67
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.67.1650
State	Published - 1991

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Scanning tunneling spectroscopy of a vortex core from the clean to the dirty limit",

abstract = "The local density of states of a superconducting vortex core has been measured as a function of disorder in the alloy system Nb1-xTaxSe2 using a low-temperature scanning tunneling microscope. The peak observed in the zero-bias conductance at a vortex center is found to be very sensitive to disorder. As the mean free path is decreased by substitutional alloying the peak gradually disappears and for x=0.2 the density of states in the vortex center is found to be equal to that in the normal state. The vortex-core spectra hence may provide a sensitive measure of the quasiparticle scattering time.",

author = "Ch Renner and Kent, {A. D.} and Ph Niedermann and Fischer and F. L{\'e}vy",

year = "1991",

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AU - Kent, A. D.

AU - Niedermann, Ph

AU - Fischer,

AU - Lévy, F.

PY - 1991

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N2 - The local density of states of a superconducting vortex core has been measured as a function of disorder in the alloy system Nb1-xTaxSe2 using a low-temperature scanning tunneling microscope. The peak observed in the zero-bias conductance at a vortex center is found to be very sensitive to disorder. As the mean free path is decreased by substitutional alloying the peak gradually disappears and for x=0.2 the density of states in the vortex center is found to be equal to that in the normal state. The vortex-core spectra hence may provide a sensitive measure of the quasiparticle scattering time.

AB - The local density of states of a superconducting vortex core has been measured as a function of disorder in the alloy system Nb1-xTaxSe2 using a low-temperature scanning tunneling microscope. The peak observed in the zero-bias conductance at a vortex center is found to be very sensitive to disorder. As the mean free path is decreased by substitutional alloying the peak gradually disappears and for x=0.2 the density of states in the vortex center is found to be equal to that in the normal state. The vortex-core spectra hence may provide a sensitive measure of the quasiparticle scattering time.

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