Superconducting quantum point contacts

L. Bretheau; Ç. Girit; L. Tosi; M. Goffman; P. Joyez; H. Pothier; D. Esteve; C. Urbina

doi:10.1016/j.crhy.2011.12.006

Prix Servant 2011 de lʼAcadémie des sciences

Superconducting quantum point contacts
[Contacts ponctuels quantiques supraconducteurs]

L. Bretheau ¹ ; Ç. Girit ¹ ; L. Tosi ¹ ; M. Goffman ¹ ; P. Joyez ¹ ; H. Pothier ¹ ; D. Esteve ¹ ; C. Urbina ¹

¹ Quantronics Group, Service de Physique de lʼÉtat Condensé (CNRS, URA 2464), IRAMIS, CEA-Saclay, 91191 Gif-sur-Yvette cedex, France

Comptes Rendus. Physique, Volume 13 (2012) no. 1, pp. 89-100.

Résumé
Abstract

Nous décrivons un ensemble dʼexpériences de transport électronique que notre groupe a réalisées sur des contacts atomiques entre des électrodes métalliques, en particulier dans lʼétat supraconducteur. Bien que leur configuration atomique exacte ne soit pas connue, ces contacts ponctuels quantiques peuvent être manipulés et caractérisés in-situ, et permettent de mener à bien des tests fondamentaux de la théorie en diffusion du transport quantique. Nous discutons en particulier le cas de lʼeffet Josephson.

We review our experiments on the electronic transport properties of atomic contacts between metallic electrodes, in particular superconducting ones. Despite ignorance of the exact atomic configuration, these ultimate quantum point contacts can be manipulated and well characterized in-situ. They allow performing fundamental tests of the scattering theory of quantum transport. In particular, we discuss the case of the Josephson effect.

Reçu le : 2011-09-06
Accepté le : 2011-12-02
Publié le : 2011-12-23

DOI : 10.1016/j.crhy.2011.12.006

Keywords: Atomic contacts, Superconductivity, Quantum transport
Mot clés : Contacts atomiques, Supraconductivité, Transport quantique

Affiliations des auteurs :

L. Bretheau ¹ ; Ç. Girit ¹ ; L. Tosi ¹ ; M. Goffman ¹ ; P. Joyez ¹ ; H. Pothier ¹ ; D. Esteve ¹ ; C. Urbina ¹

¹ Quantronics Group, Service de Physique de lʼÉtat Condensé (CNRS, URA 2464), IRAMIS, CEA-Saclay, 91191 Gif-sur-Yvette cedex, France

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     title = {Superconducting quantum point contacts},
     journal = {Comptes Rendus. Physique},
     pages = {89--100},
     publisher = {Elsevier},
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     number = {1},
     year = {2012},
     doi = {10.1016/j.crhy.2011.12.006},
     language = {en},
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L. Bretheau; Ç. Girit; L. Tosi; M. Goffman; P. Joyez; H. Pothier; D. Esteve; C. Urbina. Superconducting quantum point contacts. Comptes Rendus. Physique, Volume 13 (2012) no. 1, pp. 89-100. doi : 10.1016/j.crhy.2011.12.006. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.12.006/

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