Controlling the near-surface superfluid density in underdoped YBa2Cu3O(6+x) by photo-illumination.

ABSTRACT: The interaction with light weakens the superconducting ground state in classical superconductors. The situation in cuprate superconductors is more complicated: illumination increases the charge carrier density, a photo-induced effect that persists below room temperature. Furthermore, systematic investigations in underdoped YBa2Cu3O(6+x) (YBCO) have shown an enhanced critical temperature Tc. Until now, studies of photo-persistent conductivity (PPC) have been limited to investigations of structural and transport properties, as well as the onset of superconductivity. Here we show how changes in the magnetic screening profile of YBCO in the Meissner state due to PPC can be determined on a nanometer scale utilizing low-energy muons. The data obtained reveal a strongly increased superfluid densi

SUBMITTER: Stilp E 

PROVIDER: S-EPMC4150113 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature