Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2012 Nov 2;109(18):187003. doi: 10.1103/PhysRevLett.109.187003. Epub 2012 Oct 31.
Unconventional superconductors host a plethora of interesting physical phenomena. However, the standard theory of superconductors suggests that unconventional pairing is highly sensitive to disorder, and hence can only be observed in ultraclean systems. We find that due to an emergent chiral symmetry, spin-orbital locking can parametrically suppress pair decoherence introduced by impurity scattering in odd-parity superconductors. Our work demonstrates that disorder is not an obstacle to realize odd-parity superconductivity in materials with strong spin-orbit coupling.
非常规超导体中存在着大量有趣的物理现象。然而，超导体的标准理论表明，非常规配对对无序非常敏感，因此只能在超净系统中观察到。我们发现，由于出现手征对称性，自旋轨道锁定可以参数化地抑制杂质散射引起的奇偶超导中对的退相干。我们的工作表明，在具有强自旋轨道耦合的材料中，无序并不是实现奇偶超导的障碍。
