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 - Localisation of excitations by particle-hole scattering in inhomogeneous superconductors
AU - Lambert, Colin
AU - Hui, V. C.
PY - 1990/8
Y1 - 1990/8
N2 - We demonstrate that the quasi-particle excitations of a two dimensional inhomogeneous superconductor may be localised by spatial fluctuations in the order parameter Δ (r). Two models of disorder are introduced. In the first, the magnitude of Δ (r) varies randomly, but the phase is constant. In the second, the phase varies randomly with position, but the magnitude of Δ (r) is constant. A finite size scaling technique is used to compute the inverse localisation length of long strips of finite width. The results suggest that for a two dimensional superconductor, fluctuations in |Δ(r)| can localise excitations, while fluctuations in the phase alone cannot.
AB - We demonstrate that the quasi-particle excitations of a two dimensional inhomogeneous superconductor may be localised by spatial fluctuations in the order parameter Δ (r). Two models of disorder are introduced. In the first, the magnitude of Δ (r) varies randomly, but the phase is constant. In the second, the phase varies randomly with position, but the magnitude of Δ (r) is constant. A finite size scaling technique is used to compute the inverse localisation length of long strips of finite width. The results suggest that for a two dimensional superconductor, fluctuations in |Δ(r)| can localise excitations, while fluctuations in the phase alone cannot.
U2 - 10.1016/S0921-4526(09)80139-7
DO - 10.1016/S0921-4526(09)80139-7
M3 - Journal article
VL - 165-166
SP - 1107
EP - 1108
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 2
ER -