Tunneling spectroscopy of high-Tc superconductors

L. Alff; A. Marx; R. Gross; A. Beck; H. Takashima; S. Kashiwaya; M. Koyanagi; Y. Tanaka

doi:10.1016/S0964-1807(99)00042-3

Tunneling spectroscopy of high-T_c superconductors

L. Alff
, A. Marx
, R. Gross
, A. Beck
, H. Takashima
, S. Kashiwaya
, M. Koyanagi
, Y. Tanaka

University of Cologne
IBM Zurich Research Laboratory
Electrotechnical Laboratory
Niigata University

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

2 Scopus citations

Abstract

We have performed tunneling spectroscopy experiments on different kinds of high-temperature superconductors (HTS) and different types of junctions. Firstly, spectra were taken on surfaces of YBa₂Cu₃O_7-δ (YBCO) thin films and Nd_1.85Ce_0.15CuO_4-γ (NCCO) single crystals by low-temperature scanning tunneling microscopy/spectroscopy (LTSTM/S) in a superconductor-insulator-normal metal (SIN) configuration. Second, the tunneling spectra of grain-boundary junctions (GBJs) fabricated on bicrystal substrates were measured for the materials YBCO, La_1.85Sr_0.15CuO_4-δ (LSCO), Bi₂Sr₂Ca-Cu₂O₈ + δ (BSCCO) and NCCO in a SIS configuration. The characteristics of the spectra in both systems could be related to the symmetry of the order parameter in the superconducting electrode(s). In particular, a zero bias conductance peak (ZBCP) was observed only in systems with a d-wave symmetry, but was completely absent in the s-wave system NCCO.

Original language	English
Pages (from-to)	783-787
Number of pages	5
Journal	Applied Superconductivity
Volume	6
Issue number	10-12
DOIs	https://doi.org/10.1016/S0964-1807(99)00042-3
State	Published - 1999
Externally published	Yes

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@article{d470cb9ccdb2433cbae94bfbd1f40729,

title = "Tunneling spectroscopy of high-Tc superconductors",

abstract = "We have performed tunneling spectroscopy experiments on different kinds of high-temperature superconductors (HTS) and different types of junctions. Firstly, spectra were taken on surfaces of YBa2Cu3O7-δ (YBCO) thin films and Nd1.85Ce0.15CuO4-γ (NCCO) single crystals by low-temperature scanning tunneling microscopy/spectroscopy (LTSTM/S) in a superconductor-insulator-normal metal (SIN) configuration. Second, the tunneling spectra of grain-boundary junctions (GBJs) fabricated on bicrystal substrates were measured for the materials YBCO, La1.85Sr0.15CuO4-δ (LSCO), Bi2Sr2Ca-Cu2O8 + δ (BSCCO) and NCCO in a SIS configuration. The characteristics of the spectra in both systems could be related to the symmetry of the order parameter in the superconducting electrode(s). In particular, a zero bias conductance peak (ZBCP) was observed only in systems with a d-wave symmetry, but was completely absent in the s-wave system NCCO.",

author = "L. Alff and A. Marx and R. Gross and A. Beck and H. Takashima and S. Kashiwaya and M. Koyanagi and Y. Tanaka",

year = "1999",

doi = "10.1016/S0964-1807(99)00042-3",

language = "English",

volume = "6",

pages = "783--787",

journal = "Applied Superconductivity",

issn = "0964-1807",

publisher = "Pergamon Press Ltd.",

number = "10-12",

}

TY - JOUR

T1 - Tunneling spectroscopy of high-Tc superconductors

AU - Alff, L.

AU - Marx, A.

AU - Gross, R.

AU - Beck, A.

AU - Takashima, H.

AU - Kashiwaya, S.

AU - Koyanagi, M.

AU - Tanaka, Y.

PY - 1999

Y1 - 1999

N2 - We have performed tunneling spectroscopy experiments on different kinds of high-temperature superconductors (HTS) and different types of junctions. Firstly, spectra were taken on surfaces of YBa2Cu3O7-δ (YBCO) thin films and Nd1.85Ce0.15CuO4-γ (NCCO) single crystals by low-temperature scanning tunneling microscopy/spectroscopy (LTSTM/S) in a superconductor-insulator-normal metal (SIN) configuration. Second, the tunneling spectra of grain-boundary junctions (GBJs) fabricated on bicrystal substrates were measured for the materials YBCO, La1.85Sr0.15CuO4-δ (LSCO), Bi2Sr2Ca-Cu2O8 + δ (BSCCO) and NCCO in a SIS configuration. The characteristics of the spectra in both systems could be related to the symmetry of the order parameter in the superconducting electrode(s). In particular, a zero bias conductance peak (ZBCP) was observed only in systems with a d-wave symmetry, but was completely absent in the s-wave system NCCO.

AB - We have performed tunneling spectroscopy experiments on different kinds of high-temperature superconductors (HTS) and different types of junctions. Firstly, spectra were taken on surfaces of YBa2Cu3O7-δ (YBCO) thin films and Nd1.85Ce0.15CuO4-γ (NCCO) single crystals by low-temperature scanning tunneling microscopy/spectroscopy (LTSTM/S) in a superconductor-insulator-normal metal (SIN) configuration. Second, the tunneling spectra of grain-boundary junctions (GBJs) fabricated on bicrystal substrates were measured for the materials YBCO, La1.85Sr0.15CuO4-δ (LSCO), Bi2Sr2Ca-Cu2O8 + δ (BSCCO) and NCCO in a SIS configuration. The characteristics of the spectra in both systems could be related to the symmetry of the order parameter in the superconducting electrode(s). In particular, a zero bias conductance peak (ZBCP) was observed only in systems with a d-wave symmetry, but was completely absent in the s-wave system NCCO.

UR - https://www.scopus.com/pages/publications/0032173971

U2 - 10.1016/S0964-1807(99)00042-3

DO - 10.1016/S0964-1807(99)00042-3

M3 - Article

AN - SCOPUS:0032173971

SN - 0964-1807

VL - 6

SP - 783

EP - 787

JO - Applied Superconductivity

JF - Applied Superconductivity

IS - 10-12

ER -

Tunneling spectroscopy of high-T_c superconductors

Abstract

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