Andreev reflection spectroscopy of MgB2 in the vortex state

P. Samuely; P. Szabó; J. Kačmarčík; T. Klein

doi:10.1016/j.physc.2004.01.018

Andreev reflection spectroscopy of MgB₂ in the vortex state

P. Samuely
, P. Szabó
, J. Kačmarčík
, T. Klein

Slovak Academy of Sciences
Institut NÉEL

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

Spectroscopy based on the Andreev reflection (AR) process at the interface between the normal metal tip and the superconductor has become one of the very successful methods for studies in novel exotic superconductors. The method is capable to address the size, symmetry as well as multiplicity of the superconducting order parameter. The method provided one of the first evidences of the two-gap superconductivity in MgB₂ with a detailed temperature dependence of the both gaps. A theory treating the Andreev reflection spectroscopy in the mixed state is missing. We analyse the AR spectra of MgB₂ in the mixed state via modelling the magnetic pair-breaking by the increasing spectral broadening parameter Γ. As a result a non-trivial pair breaking effect in the π-band is found.

Original language	English
Pages (from-to)	460-465
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	404
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physc.2004.01.018
Publication status	Published - 1 May 2004
Externally published	Yes
Event	Proceedings of the third European Conference on Vortex Matter - Crete, Greece Duration: 20 Sept 2003 → 28 Sept 2003

Keywords

Andreev reflection
Spectroscopy
Vortex state

Access to Document

10.1016/j.physc.2004.01.018

Cite this

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title = "Andreev reflection spectroscopy of MgB2 in the vortex state",

abstract = "Spectroscopy based on the Andreev reflection (AR) process at the interface between the normal metal tip and the superconductor has become one of the very successful methods for studies in novel exotic superconductors. The method is capable to address the size, symmetry as well as multiplicity of the superconducting order parameter. The method provided one of the first evidences of the two-gap superconductivity in MgB2 with a detailed temperature dependence of the both gaps. A theory treating the Andreev reflection spectroscopy in the mixed state is missing. We analyse the AR spectra of MgB2 in the mixed state via modelling the magnetic pair-breaking by the increasing spectral broadening parameter Γ. As a result a non-trivial pair breaking effect in the π-band is found.",

keywords = "Andreev reflection, Spectroscopy, Vortex state",

author = "P. Samuely and P. Szab{\'o} and J. Ka{\v c}mar{\v c}{\'i}k and T. Klein",

year = "2004",

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doi = "10.1016/j.physc.2004.01.018",

language = "English",

volume = "404",

pages = "460--465",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "1-4",

note = "Proceedings of the third European Conference on Vortex Matter ; Conference date: 20-09-2003 Through 28-09-2003",

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TY - JOUR

T1 - Andreev reflection spectroscopy of MgB2 in the vortex state

AU - Samuely, P.

AU - Szabó, P.

AU - Kačmarčík, J.

AU - Klein, T.

PY - 2004/5/1

Y1 - 2004/5/1

N2 - Spectroscopy based on the Andreev reflection (AR) process at the interface between the normal metal tip and the superconductor has become one of the very successful methods for studies in novel exotic superconductors. The method is capable to address the size, symmetry as well as multiplicity of the superconducting order parameter. The method provided one of the first evidences of the two-gap superconductivity in MgB2 with a detailed temperature dependence of the both gaps. A theory treating the Andreev reflection spectroscopy in the mixed state is missing. We analyse the AR spectra of MgB2 in the mixed state via modelling the magnetic pair-breaking by the increasing spectral broadening parameter Γ. As a result a non-trivial pair breaking effect in the π-band is found.

AB - Spectroscopy based on the Andreev reflection (AR) process at the interface between the normal metal tip and the superconductor has become one of the very successful methods for studies in novel exotic superconductors. The method is capable to address the size, symmetry as well as multiplicity of the superconducting order parameter. The method provided one of the first evidences of the two-gap superconductivity in MgB2 with a detailed temperature dependence of the both gaps. A theory treating the Andreev reflection spectroscopy in the mixed state is missing. We analyse the AR spectra of MgB2 in the mixed state via modelling the magnetic pair-breaking by the increasing spectral broadening parameter Γ. As a result a non-trivial pair breaking effect in the π-band is found.

KW - Andreev reflection

KW - Spectroscopy

KW - Vortex state

U2 - 10.1016/j.physc.2004.01.018

DO - 10.1016/j.physc.2004.01.018

M3 - Conference article

AN - SCOPUS:1842852107

SN - 0921-4534

VL - 404

SP - 460

EP - 465

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

T2 - Proceedings of the third European Conference on Vortex Matter

Y2 - 20 September 2003 through 28 September 2003