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Phase dependent current statistics in shortarm Andreev interferometer  E.V. Bezuglyi
; E.N. Bratus’
; V.S. Shumeiko
; V. Vinokur
;  Date: 
7 Nov 2003  Subject:  Superconductivity; Mesoscopic Systems and Quantum Hall Effect  condmat.suprcon condmat.meshall  Abstract:  We calculate analytically the current statistics for a short diffusive wire between the normal reservoir and a short superconductornormal metalsuperconductor (SNS) junction, at arbitrary applied voltages and temperatures. The cumulantgenerating function oscillates with the phase difference $phi$ across the junction, approaching the normalstate value at $phi=pi$. At T=0 and at the applied voltage much smaller than the proximity gap $Delta_phi$, the current noise $P_I$ doubles and the third current cumulant $C_3$ is 4 times larger with respect to their values in the normal state; at $eV gg Delta_phi$ they acquire large excess components. At the gap edge, $eV = Delta_phi$, the effective transferred charge defined through $dP_I/dI$ and $dP_I/dV$ approaches $0e$ and $3e$, respectively, which makes doubtful the interpretation of these quantities as physical elementary transferred charge. At $T
eq 0$, $C_3$ shows a nonmonotonous voltage dependence with a dip near $eV = Delta_phi$.  Source:  arXiv, condmat/0311176  Services:  Forum  Review  PDF  Favorites 


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