Tunneling spectroscopy of single crystal BI2SR2CACU2O8

H. J. Tao; Farun Lu; E. L. Wolf

doi:10.1016/0022-3697(91)90130-R

Tunneling spectroscopy of single crystal BI₂SR₂CACU₂O₈

H. J. Tao, Farun Lu, E. L. Wolf

Applied Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We report an extensive study of conventional tunnel junctions with Pb counterelectrodes on cleaved ab planes of Bi₂Sr₂CaCu₂O₈ single crystals with natural barriers. A two-gap structure has been observed for high quality fresh junctions: the inner gap Δ₁(T) is BCS-like, the outer gap ΔA₀(T) is not BCS-like. The fitted outer gap Δ_o(0)=26 meV, and 2Δ_o(0)/kTc-6.7. For older junctions only a smooth conductance with a broadened single gap shows up.

Original language	English (US)
Pages (from-to)	1481-1483
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	52
Issue number	11-12
DOIs	https://doi.org/10.1016/0022-3697(91)90130-R
State	Published - 1991

Keywords

BiSrCaCuO two energy gaps
high T
tunneling

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/0022-3697(91)90130-R

Cite this

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title = "Tunneling spectroscopy of single crystal BI2SR2CACU2O8",

abstract = "We report an extensive study of conventional tunnel junctions with Pb counterelectrodes on cleaved ab planes of Bi2Sr2CaCu2O8 single crystals with natural barriers. A two-gap structure has been observed for high quality fresh junctions: the inner gap Δ1(T) is BCS-like, the outer gap ΔA0(T) is not BCS-like. The fitted outer gap Δo(0)=26 meV, and 2Δo(0)/kTc-6.7. For older junctions only a smooth conductance with a broadened single gap shows up.",

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T1 - Tunneling spectroscopy of single crystal BI2SR2CACU2O8

AU - Tao, H. J.

AU - Lu, Farun

AU - Wolf, E. L.

PY - 1991

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N2 - We report an extensive study of conventional tunnel junctions with Pb counterelectrodes on cleaved ab planes of Bi2Sr2CaCu2O8 single crystals with natural barriers. A two-gap structure has been observed for high quality fresh junctions: the inner gap Δ1(T) is BCS-like, the outer gap ΔA0(T) is not BCS-like. The fitted outer gap Δo(0)=26 meV, and 2Δo(0)/kTc-6.7. For older junctions only a smooth conductance with a broadened single gap shows up.

AB - We report an extensive study of conventional tunnel junctions with Pb counterelectrodes on cleaved ab planes of Bi2Sr2CaCu2O8 single crystals with natural barriers. A two-gap structure has been observed for high quality fresh junctions: the inner gap Δ1(T) is BCS-like, the outer gap ΔA0(T) is not BCS-like. The fitted outer gap Δo(0)=26 meV, and 2Δo(0)/kTc-6.7. For older junctions only a smooth conductance with a broadened single gap shows up.

KW - BiSrCaCuO two energy gaps

KW - high T

KW - tunneling

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