Response to tilted magnetic fields in Bi₂Sr₂CaCu₂O₈ with columnar defects: Evidences for transverse Meissner effect

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The transverse Meissner effect (TME) in the highly layered superconductor Bi₂Sr₂CaCu₂O₈₊y with columnar defects is investigated by transport measurements. We present detailed evidence for the persistence of the Bose glass phase for H⊥<H⊥ 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⊥ c the energy barriers vanish linearly with H⊥; (iii) the transition temperature is governed by TBG(H∥,0) -TBG(H∥,H⊥) |H⊥| ¹/ν⊥ with ν⊥=1.0 ± 0.1. Furthermore, above the transition as H⊥→ H⊥ 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⊥<H⊥ c.