https://doi.org/10.1140/epjb/e2003-00124-5
Fluctuation-induced magnetotransport of superconductors in the quasiballistic regime
1
INFM and Dipartimento di Fisica,
Università di
Roma Tre, Via della vasca Navale 84, 00146 Roma, Italy
2
Moscow State Institute of Steel and Alloys
(Technological University), Leninsky prospect 4, 119991 Moscow, Russia
3
COHERENTIA-INFM UdR “Tor Vergata”, viale del Politecnico, 1, 00133
Roma, Italy
Received:
10
July
2002
Revised:
21
November
2002
Published online:
7
May
2003
We study the fluctuation-induced magnetotransport of a two-dimensional
superconductor in the quasiballistic regime, where 
(
is the electron mean free path and 
is the
Ginzburg-Landau coherence length). The magnetoconductivity is
evaluated in the nonlocal fluctuation regime thereby extending the existing
theory valid in the local limit. We show that the Maki-Thompson (MT) and
density-of-states (DOS) contributions strongly compensate each other and
their sum is negligible in comparison with the Aslamazov-Larkin (AL) term.
The hierarchy of the fluctuation contributions to the magnetoconductivity in
the high-field limit is also qualitatively discussed.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 71.30.+h – Metal-insulator transitions and other electronic transitions / 71.10.Ay – Fermi-liquid theory and other phenomenological models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
