TY - JOUR

T1 - Crossover from mesoscopic to classical proximity effects, induced by particle-hole symmetry breaking in Andreev interferometers

AU - Volkov, A

AU - Allsopp, N

AU - Lambert, Colin

PY - 1996

Y1 - 1996

N2 - When two superconducting contacts are made on either side of a mesoscopic normal wire, the electrical conductance is a periodic function of the phase difference between the superconductors. For this structure, the oscillation at zero voltage and zero temperature is a small mesoscopic effect, with an amplitude of order e(2)/h. In contrast, we predict that a finite bias voltage V will induce giant oscillations associated with the classical proximity effect. These are a finite fraction of the overall conductance, exhibit a maximum when eV equals the Thouless energy, and decrease at higher voltages. This effect may account for the large-amplitude oscillations measured in recent experiments by Petrashov et al.

AB - When two superconducting contacts are made on either side of a mesoscopic normal wire, the electrical conductance is a periodic function of the phase difference between the superconductors. For this structure, the oscillation at zero voltage and zero temperature is a small mesoscopic effect, with an amplitude of order e(2)/h. In contrast, we predict that a finite bias voltage V will induce giant oscillations associated with the classical proximity effect. These are a finite fraction of the overall conductance, exhibit a maximum when eV equals the Thouless energy, and decrease at higher voltages. This effect may account for the large-amplitude oscillations measured in recent experiments by Petrashov et al.

U2 - 10.1088/0953-8984/8/4/001

DO - 10.1088/0953-8984/8/4/001

M3 - Letter

VL - 8

SP - L45-L50

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

IS - 4

ER -