TY - JOUR
T1 - Evidence of vortices on the insulating side of the superconductor-insulator transition
AU - Marković, N.
AU - Mack, A. M.
AU - Martinez-Arizala, G.
AU - Christiansen, C.
AU - Goldman, A. M.
PY - 1998
Y1 - 1998
N2 - The magnetoresistance of ultrathin insulating films of Bi has been studied with magnetic fields applied parallel and perpendicular to the plane of the sample. Deep in the strongly localized regime, the magnetoresistance is negative and independent of field orientation. As film thicknesses increase, the magnetoresistance becomes positive, and a difference between values measured in perpendicular and parallel fields appears, which is a linear function of the magnetic field and is positive. This is not consistent with the quantum interference picture. We suggest that it is due to vortices present on the insulating side of the superconductor-insulator transition.
AB - The magnetoresistance of ultrathin insulating films of Bi has been studied with magnetic fields applied parallel and perpendicular to the plane of the sample. Deep in the strongly localized regime, the magnetoresistance is negative and independent of field orientation. As film thicknesses increase, the magnetoresistance becomes positive, and a difference between values measured in perpendicular and parallel fields appears, which is a linear function of the magnetic field and is positive. This is not consistent with the quantum interference picture. We suggest that it is due to vortices present on the insulating side of the superconductor-insulator transition.
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U2 - 10.1103/PhysRevLett.81.701
DO - 10.1103/PhysRevLett.81.701
M3 - Article
AN - SCOPUS:0032551475
SN - 0031-9007
VL - 81
SP - 701
EP - 704
JO - Physical review letters
JF - Physical review letters
IS - 3
ER -