The transverse Meissner effect (TME) in the highly layered superconductor $Bi_2Sr_2CaCu_2O_{ 8+y}$ with columnar defects is investigated by transport measurements. We present detailed evidence for the persistence of the Bose glass phase for $H_{ \perp}<H_{ \perp c}$ : (i) the variable-range vortex hopping process for low currents crosses over to the half-loops regime for high currents; (ii) in both regimes near $H_{ \perp c}$ the energy barriers vanish linearly with $H_{ \perp}$ ; (iii) the transition temperature is governed by $T_{ BG}(H_{ \parallel},0) -T_{ BG}(H_{ \parallel},H_{ \perp}) \sim |H_{ \perp}| ^{ 1/\nu_{ \perp}}$ with $\nu_{ \perp}=1.0 \pm 0.1$. Furthermore, above the transition as $H_{ \perp}\to H_{ \perp c}^+$, moving kink chains consistent with a commensurate-incommensurate transition scenario are observed. These results thereby clearly show the existence of the TME for $H_{ \perp}<H_{ \perp c}$ .
Categories: cond-mat.supr-con cond-mat.dis-nn