Vortex-like excitations in a non-superconducting single-layer compound Bi$_{2+x}$Sr$_{2-x}$CuO$_{6+δ}$ single crystal in high magnetic fields

S. I. Vedeneev; D. K. Maude

doi:10.1103/PhysRevB.72.214514

paper

Vortex-like excitations in a non-superconducting single-layer compound Bi $_{2 + x}$ Sr $_{2 - x}$ CuO $_{6 + δ}$ single crystal in high magnetic fields

arXiv:cond-mat/0512495 · doi:10.1103/PhysRevB.72.214514

Abstract

The in-plane $ρ_{ab} (H, T)$ and the out-of-plane $ρ_{c} (H, T)$ magneto-transport in magnetic fields up to 28 T has been investigated in high quality non-superconducting (down to 20 mK) La-free Bi $_{2 + x}$ Sr $_{2 - x}$ CuO $_{6 + δ}$ single crystal. By measuring the angular dependence of the in-plane and out-of-plane magnetoresistivities at temperatures from 1 K down to 30 mK, we present evidence for the presence of vortex-like excitations in a non-superconducting cuprate in the insulating state. Such excitations have previously been observed by the detection of a Nernst signal in superconducting cuprates at $T > T_{c}$ in magnetic fields.

Vortex-like excitations in a non-superconducting single-layer compound Bi2+x​Sr2−x​CuO6+δ​ single crystal in high magnetic fields

Abstract

Vortex-like excitations in a non-superconducting single-layer compound Bi $_{2 + x}$ Sr $_{2 - x}$ CuO $_{6 + δ}$ single crystal in high magnetic fields