Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Subgap conductance in ferromagnet-superconductor mesoscopic structures
AU - Leadbeater, M.
AU - Lambert, C. J.
AU - Nagaev, K. E.
AU - Raimondi, R.
AU - Volkov, A. F.
PY - 1999/5/15
Y1 - 1999/5/15
N2 - We study the subgap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of the exchange field, the ratio r = gamma/epsilon(T) Of the two-tunnel junction resistances determines the behavior of the subgap conductance, which possesses a zero-bias peak for r much greater than 1 and for r much less than 1 a peak at finite voltage. We show that the inclusion of the exchange field leads to a peak splitting for r much less than 1, while it shifts the zero-bias anomaly to finite voltages for r much greater than 1.
AB - We study the subgap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of the exchange field, the ratio r = gamma/epsilon(T) Of the two-tunnel junction resistances determines the behavior of the subgap conductance, which possesses a zero-bias peak for r much greater than 1 and for r much less than 1 a peak at finite voltage. We show that the inclusion of the exchange field leads to a peak splitting for r much less than 1, while it shifts the zero-bias anomaly to finite voltages for r much greater than 1.
U2 - 10.1103/PhysRevB.59.12264
DO - 10.1103/PhysRevB.59.12264
M3 - Journal article
VL - 59
SP - 12264
EP - 12267
JO - Physical review B
JF - Physical review B
SN - 0163-1829
IS - 19
ER -