Andreev reflection spectroscopy in MgB2

P. Szabó; P. Samuely; J. Kačmarčík; T. Klein; J. Marcus; A. G.M. Jansen

doi:10.1016/S0921-4526(02)01798-2

Andreev reflection spectroscopy in MgB₂

P. Szabó
, P. Samuely
, J. Kačmarčík
, T. Klein
, J. Marcus
, A. G.M. Jansen

Résultats de recherche: Contribution à un journal › Article de conférence › Revue par des pairs

Résumé

Our Andreev reflection measurements (Phys. Rev. Lett. 87 (2001) 137005) along with other experiments have led to a general consensus that MgB₂ is a multiband superconductor with two main superconducting gaps closing at the same T_c. Here we show the behavior of the small gap as a function of the temperature and magnetic field. This gap is isotropic with T_c of the bulk material but with a specific small (crossover) critical magnetic field of about 1 T much lower than the real H_c2. The latter field is anisotropic and is rather governed by the large gap and strongly anisotropic Fermi surface of the material.

langue originale	Anglais
Pages (de - à)	10-14
Nombre de pages	5
journal	Physica B: Physics of Condensed Matter
Volume	328
Numéro de publication	1-2
Les DOIs	https://doi.org/10.1016/S0921-4526(02)01798-2
état	Publié - 1 janv. 2003
Modification externe	Oui
Evénement	T2PAM - Higashi-Hiroshima, Japon Durée: 16 août 2002 → 19 août 2002

Accès au document

10.1016/S0921-4526(02)01798-2

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Contient cette citation

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title = "Andreev reflection spectroscopy in MgB2 ",

abstract = "Our Andreev reflection measurements (Phys. Rev. Lett. 87 (2001) 137005) along with other experiments have led to a general consensus that MgB2 is a multiband superconductor with two main superconducting gaps closing at the same Tc. Here we show the behavior of the small gap as a function of the temperature and magnetic field. This gap is isotropic with Tc of the bulk material but with a specific small (crossover) critical magnetic field of about 1 T much lower than the real Hc2. The latter field is anisotropic and is rather governed by the large gap and strongly anisotropic Fermi surface of the material.",

keywords = "Andreev reflection spectroscopy, MgB",

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

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T1 - Andreev reflection spectroscopy in MgB2

AU - Szabó, P.

AU - Samuely, P.

AU - Kačmarčík, J.

AU - Klein, T.

AU - Marcus, J.

AU - Jansen, A. G.M.

PY - 2003/1/1

Y1 - 2003/1/1

N2 - Our Andreev reflection measurements (Phys. Rev. Lett. 87 (2001) 137005) along with other experiments have led to a general consensus that MgB2 is a multiband superconductor with two main superconducting gaps closing at the same Tc. Here we show the behavior of the small gap as a function of the temperature and magnetic field. This gap is isotropic with Tc of the bulk material but with a specific small (crossover) critical magnetic field of about 1 T much lower than the real Hc2. The latter field is anisotropic and is rather governed by the large gap and strongly anisotropic Fermi surface of the material.

AB - Our Andreev reflection measurements (Phys. Rev. Lett. 87 (2001) 137005) along with other experiments have led to a general consensus that MgB2 is a multiband superconductor with two main superconducting gaps closing at the same Tc. Here we show the behavior of the small gap as a function of the temperature and magnetic field. This gap is isotropic with Tc of the bulk material but with a specific small (crossover) critical magnetic field of about 1 T much lower than the real Hc2. The latter field is anisotropic and is rather governed by the large gap and strongly anisotropic Fermi surface of the material.

KW - Andreev reflection spectroscopy

KW - MgB

UR - https://www.scopus.com/pages/publications/0037399966

U2 - 10.1016/S0921-4526(02)01798-2

DO - 10.1016/S0921-4526(02)01798-2

M3 - Conference article

AN - SCOPUS:0037399966

SN - 0921-4526

VL - 328

SP - 10

EP - 14

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

IS - 1-2

T2 - T2PAM

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