Monday, November 19, 2012

1211.3954 (W. Chang et al.)

Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful
Josephson Junction
   [PDF]

W. Chang, V. E. Manucharyan, T. S. Jespersen, J. Nygard, C. M. Marcus
The spectrum of a segment of InAs nanowire, confined between two superconducting leads, was measured as function of gate voltage and superconducting phase difference using a third normal-metal tunnel probe. Sub-gap resonances for odd electron occupancy---interpreted as bound states involving a confined electron and a quasiparticle from the superconducting leads, reminiscent of Yu-Shiba-Rusinov states---evolve into Kondo-related resonances at higher magnetic fields. An additional zero bias peak of unknown origin is observed to coexist with the quasiparticle bound states.
View original: http://arxiv.org/abs/1211.3954

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