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

Abstract

The in-plane ${\rho }_{ab}(H,T)$ and the out-of-plane ${\rho }_c(H,T)$ 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${}_{6+\delta }$ 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.

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• The irreversibility line of overdoped Bi_{2+x}Sr_{2-(x+y)}Cu_{1+y}O_{6 +- delta} at ultra-low temperatures and high magnetic fields

Cited by in corpus (1)

• Gap like structure in a nonsuperconducting layered oxycarbonate Bi${}_{2+x}$Sr${}_{4-x}$Cu${}_2$CO${}_3$O${}_{8+\delta }$ single crystal