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) |
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Pages (from-to) | 1650-1652 |
Number of pages | 3 |
Journal | Physical Review Letters |
Volume | 67 |
Issue number | 12 |
DOIs | |
State | Published - 1991 |
ASJC Scopus subject areas
- Physics and Astronomy(all)