TY - JOUR
T1 - Nernst effect beyond the coherence critical field of a nanoscale granular superconductor
AU - Lerer, S.
AU - Bachar, N.
AU - Deutscher, G.
AU - Dagan, Y.
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/12/29
Y1 - 2014/12/29
N2 - We report measurements of the Nernst effect and of the magnetoresistance of granular aluminum films near the metal-to-insulator transition. These films show sharp transitions as a function of temperature and magnetic field. At low temperatures the Nernst signal displays a sharp peak at a field where more than 90% of the normal-state resistance has been restored, suggesting a transition involving entropy transport after superconducting coherence has been destroyed. At temperatures higher than the critical temperature the fluctuation paraconductivity scales with the Nernst signal, in agreement with a description in terms of fluctuations of the order parameter.
AB - We report measurements of the Nernst effect and of the magnetoresistance of granular aluminum films near the metal-to-insulator transition. These films show sharp transitions as a function of temperature and magnetic field. At low temperatures the Nernst signal displays a sharp peak at a field where more than 90% of the normal-state resistance has been restored, suggesting a transition involving entropy transport after superconducting coherence has been destroyed. At temperatures higher than the critical temperature the fluctuation paraconductivity scales with the Nernst signal, in agreement with a description in terms of fluctuations of the order parameter.
UR - http://www.scopus.com/inward/record.url?scp=84951083684&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.90.214521
DO - 10.1103/PhysRevB.90.214521
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:84951083684
SN - 1098-0121
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 214521
ER -