Cappelluti E, Grimaldi C, Marsiglio F
SMC-INFM, CNR-INFM, via dei Taurini 19, 00185 Roma, Italy.
Phys Rev Lett. 2007 Apr 20;98(16):167002. doi: 10.1103/PhysRevLett.98.167002. Epub 2007 Apr 17.
In this Letter 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 in the low charge density regime. We investigate its consequences on the onset of the superconducting instability. We show 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.
在本信函中，我们展示了对于与拉什巴型自旋轨道分裂相比费米能量较小的值，费米面的拓扑变化如何导致低电荷密度 regime 中电子态密度的维度有效降低。我们研究了其对超导不稳定性起始的影响。我们表明，在该 regime 中，超导临界温度通过自旋轨道耦合被显著调节。我们认为具有强自旋轨道耦合的材料是增强超导性的良好候选者。
