Infinite randomness fixed point of the superconductor-metal quantum phase transition.
We examine the influence of quenched disorder on the superconductor-metal transition, as described by a theory of overdamped Cooper pairs which repel each other. The self-consistent pairing eigenmodes of a quasi-one-dimensional wire are determined numerically. Our results support the recent proposal by Hoyos et al. [Phys. Rev. Lett. 99, 230601 (2007)10.1103/PhysRevLett.99.230601] that the transition is characterized by the same strong-disorder fixed point describing the onset of ferromagnetism in the random quantum Ising chain in a transverse field.
Del Maestro
Adrian
A
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Rosenow
Bernd
B
Müller
Markus
M
Sachdev
Subir
S