Temperature dependence of the impurity-induced resonant state in Zn-doped Bi_2Sr_2CaCu_2O${}_{8+\delta }$ by Scanning Tunneling Spectroscopy

Abstract

We report on the temperature dependence of the impurity-induced resonant state in Zn-doped Bi_2Sr_2CaCu_2O${}_{8+\delta }$ by scanning tunneling spectroscopy at 30 mK < T < 52 K. It is known that a Zn impurity induces a sharp resonant peak in tunnel spectrum at an energy close to the Fermi level. We observed that the resonant peak survives up to 52 K. The peak broadens with increasing temperature, which is explained by the thermal effect. This result provides information to understand the origin of the resonant peak.

arXiv comment4 pages, 3 figures, to appear in Phys. Rev. B

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Cited by in corpus (3)

• Disappearance of zinc impurity resonance in large gap region on Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ probed by scanning tunneling spectroscopy
• Extinction of impurity resonances in large-gap regions of inhomogeneous d-wave superconductors
• Quantum Interference of Impurity Bound States in Bi${}_2$Sr${}_2$Ca(Cu${}_{1-x}$Zn${}_x$)${}_2$O${}_{8+\delta }$ Probed by Scanning Tunneling Spectroscopy