Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-12-05
Phys. Rev. Lett. 98, 167002 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 2 figures eps
Scientific paper
10.1103/PhysRevLett.98.167002
Strong spin-orbit coupling can have a profound effect on the electronic structure in a metal or semiconductor, particularly for low electron concentrations. We show how, for small values of the Fermi energy compared to the spin-orbit splitting of Rashba type, a topological change of the Fermi surface leads to an effective reduction of the dimensionality in the electronic density of states. We investigate its consequences on the onset of the superconducting instability. We show, by solving the Eliashberg equations for the critical temperature as a function of spin-orbit coupling and electron density, that the superconducting critical temperature is significantly tuned in this regime by the spin-orbit coupling. We suggest that materials with strong spin-orbit coupling are good candidates for enhanced superconductivity.
Cappelluti Emmanuele
Grimaldi Claudio
Marsiglio Frank
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