TY - JOUR
T1 - Scale-dependent competing interactions
T2 - Sign reversal of the average persistent current
AU - Bary-Soroker, H.
AU - Entin-Wohlman, O.
AU - Imry, Y.
AU - Aharony, A.
PY - 2013/1/28
Y1 - 2013/1/28
N2 - The interaction-induced orbital magnetic response of a nanoscale system, modeled by the persistent current in a ring geometry, is evaluated for a system which is a superconductor in the bulk. The interplay of the renormalized Coulomb and Fröhlich interactions is crucial. The diamagnetic response of the large superconductor may become paramagnetic when the finite-size-determined Thouless energy is larger than or on the order of the Debye energy.
AB - The interaction-induced orbital magnetic response of a nanoscale system, modeled by the persistent current in a ring geometry, is evaluated for a system which is a superconductor in the bulk. The interplay of the renormalized Coulomb and Fröhlich interactions is crucial. The diamagnetic response of the large superconductor may become paramagnetic when the finite-size-determined Thouless energy is larger than or on the order of the Debye energy.
UR - http://www.scopus.com/inward/record.url?scp=84873039666&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.110.056801
DO - 10.1103/PhysRevLett.110.056801
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AN - SCOPUS:84873039666
SN - 0031-9007
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 056801
ER -