Point contact tunneling study of Bi2Sr2CaCu2O8 single crystals

M. H. Jiang; C. A. Ventrice; K. J. Scoles; S. Tyagi; N. J. DiNardo; A. Rothwarf

doi:10.1016/0921-4534(91)90763-O

Point contact tunneling study of Bi₂Sr₂CaCu₂O₈ single crystals

M. H. Jiang
, C. A. Ventrice
, K. J. Scoles
, S. Tyagi
, N. J. DiNardo
, A. Rothwarf

Nanoscale Science and Engineering

University at Albany

Drexel University

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

7 Scopus citations

Abstract

Point-contact tunneling spectroscopy measurements of a high-T_c superconducting Bi₂Sr₂CaCu₂O₈ single crystal have been performed. Resonances in the current-voltage curves have been observed. A model based on the layered structure of the crystal using the modified formalism of de Gennes et al., Tomasch, and Rowell et al. has been developed for their interpretation. From the Proposed model, a superconducting energy gap parameter of δ ≈ 26 meV, corresponding to a BCS ratio 2δ k_BT_c ≈ 7.4, has been obtained. In addition, the Fermi velocity of the quasiparticles in the crystal has been estimated to be ν_F ≈ 1.5 × 10⁶ cm/s. The coherence length ξ has also been evaluated and is found to be ≈ 1 Å.

Original language	English
Pages (from-to)	39-50
Number of pages	12
Journal	Physica C: Superconductivity and its applications
Volume	183
Issue number	1-3
DOIs	https://doi.org/10.1016/0921-4534(91)90763-O
State	Published - Nov 10 1991

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title = "Point contact tunneling study of Bi2Sr2CaCu2O8 single crystals",

abstract = "Point-contact tunneling spectroscopy measurements of a high-Tc superconducting Bi2Sr2CaCu2O8 single crystal have been performed. Resonances in the current-voltage curves have been observed. A model based on the layered structure of the crystal using the modified formalism of de Gennes et al., Tomasch, and Rowell et al. has been developed for their interpretation. From the Proposed model, a superconducting energy gap parameter of δ ≈ 26 meV, corresponding to a BCS ratio 2δ kBTc ≈ 7.4, has been obtained. In addition, the Fermi velocity of the quasiparticles in the crystal has been estimated to be νF ≈ 1.5 × 106 cm/s. The coherence length ξ has also been evaluated and is found to be ≈ 1 {\AA}.",

author = "Jiang, \{M. H.\} and Ventrice, \{C. A.\} and Scoles, \{K. J.\} and S. Tyagi and DiNardo, \{N. J.\} and A. Rothwarf",

year = "1991",

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day = "10",

doi = "10.1016/0921-4534(91)90763-O",

language = "English",

volume = "183",

pages = "39--50",

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}

TY - JOUR

T1 - Point contact tunneling study of Bi2Sr2CaCu2O8 single crystals

AU - Jiang, M. H.

AU - Ventrice, C. A.

AU - Scoles, K. J.

AU - Tyagi, S.

AU - DiNardo, N. J.

AU - Rothwarf, A.

PY - 1991/11/10

Y1 - 1991/11/10

N2 - Point-contact tunneling spectroscopy measurements of a high-Tc superconducting Bi2Sr2CaCu2O8 single crystal have been performed. Resonances in the current-voltage curves have been observed. A model based on the layered structure of the crystal using the modified formalism of de Gennes et al., Tomasch, and Rowell et al. has been developed for their interpretation. From the Proposed model, a superconducting energy gap parameter of δ ≈ 26 meV, corresponding to a BCS ratio 2δ kBTc ≈ 7.4, has been obtained. In addition, the Fermi velocity of the quasiparticles in the crystal has been estimated to be νF ≈ 1.5 × 106 cm/s. The coherence length ξ has also been evaluated and is found to be ≈ 1 Å.

AB - Point-contact tunneling spectroscopy measurements of a high-Tc superconducting Bi2Sr2CaCu2O8 single crystal have been performed. Resonances in the current-voltage curves have been observed. A model based on the layered structure of the crystal using the modified formalism of de Gennes et al., Tomasch, and Rowell et al. has been developed for their interpretation. From the Proposed model, a superconducting energy gap parameter of δ ≈ 26 meV, corresponding to a BCS ratio 2δ kBTc ≈ 7.4, has been obtained. In addition, the Fermi velocity of the quasiparticles in the crystal has been estimated to be νF ≈ 1.5 × 106 cm/s. The coherence length ξ has also been evaluated and is found to be ≈ 1 Å.

UR - https://www.scopus.com/pages/publications/0026258741

U2 - 10.1016/0921-4534(91)90763-O

DO - 10.1016/0921-4534(91)90763-O

M3 - Article

SN - 0921-4534

VL - 183

SP - 39

EP - 50

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 1-3

ER -

Point contact tunneling study of Bi₂Sr₂CaCu₂O₈ single crystals

Abstract

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