Response to tilted magnetic fields in Bi(2)Sr(2)CaCu(2)O(8) with columnar defects: evidence for transverse Meissner effect.
The transverse Meissner effect (TME) in the highly layered superconductor Bi(2)Sr(2)CaCu(2)O(8+y) with columnar defects is investigated by transport measurements. We present evidence for the persistence of the Bose glass phase for H(perpendicular)<H(perpendicular c): (i) the variable-range vortex hopping process crosses over to the half-loop regime; (ii) near H(perpendicular c) the energy barriers vanish linearly with H(perpendicular); (iii) the transition temperature is governed by T(BG)(H(parallel),0)-T(BG)(H(parallel),H(perpendicular)) approximately /H( perpendicular)/(1/nu(perpendicular)) with nu(perpendicular) = 1.0 +/- 0.1. Furthermore, above the transition as H(perpendicular)-->H(+)(perpendicular c), moving kink chains consistent with a commensurate-incommensurate transition scenario are observed. These results show the existence of the TME for H(perpendicular)<H(perpendicular c).
Ta Phuoc
V
V
LEMA, CNRS-FRE 2077, Université François Rabelais, 37200 Tours, France.
Olive
E
E
De Sousa
R
R
Ruyter
A
A
Ammor
L
L
Soret
J C
JC