Centre de Physique Théorique

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Group “Statistical Mechanics and Condensed Matter”

The nanophysics team of the CPT studies quantum electronic transport in mesoscopic and nanoscopic systems of condensed matter. The reduced size of these systems, and the conditions of study (low temperature, dimensionnality, ...) guarantees that the quantum coherence is preserved, and lead to new behavior related to the fundamental properties of quantum physics.

Superconducting and hybrid systems are a first topic of research. In a superconductor, electrons form Cooper pairs, and coherent transport of Cooper pairs between two superconductors leads to Josephson current. We have studied the properties of Josephson current through a a magnetic molecule, a semi-conductor wih spin-orbit coupling, etc. We also study out-of-equilibrium supercondcuting and hybrid systems with several leads, where the two electrons of a Cooper pair can be spatially separated through cross Andreev reflection, providing a source of quantum entanglement.

A second topic of research is quantum Hall effect, where electronic transport is done through unidimensionnal edge states. The presence of electronic interactions leads to collective transport modes, where the effective charge is different from the electron charge. Statistics of the waiting time between electrons in these system is also a subject we are studying. Unidimensionnal transport can also be used to study electronic quantum optics, where the concepts of quantum optics are adapted to the case of individual electrons.

A third topic of research is quantum thermoelectricity, which is interesting both on a fundamental level and for applications. We have shown that the Seebeck coefficient can be strongly enhanced in the non-stationnary regime, and we have shown the strong link between thermoelectric efficiency and mixed correlators charge/heat. We continue the study of mixed correlators in several types of nanojunctions.

Directory of Members

Acciai Matteo PhD candidate
Crépieux Adeline University faculty
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Devillard Pierre University faculty
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Jacquet Romain ATER
Jonckheere Thibaut Researcher
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Martin Thierry Director
University faculty
Correspondant LabEx OCEVU
Chef de l’équipe « Nanophysique »
Référent pôle de recherche interdisciplinaire et intersectoriel AMU - Sciences, technologies avancées
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Raymond Laurent University faculty
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Rech Jérôme Researcher
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Ronetti Flavio PhD candidate

List of Publications

54 results
Journal article
P. Devillard, A. Crepieux, K. I. Imura, T. Martin
Electron-electron interactions in a one-dimensional quantum wire spin filter
Physical Review B : Condensed matter and materials physics, American Physical Society, 2005, 72, pp.041309. 〈10.1103/PhysRevB.72.041309〉
Journal article
Andrei V. Lebedev, Adeline Crepieux, Thierry Martin
Electron injection in a nanotube with leads: finite frequency noise-correlations and anomalous charges
Physical Review B : Condensed matter and materials physics, American Physical Society, 2005, 71, pp.075416. 〈10.1103/PhysRevB.71.075416〉
Journal article
Adeline Crépieux, Rodolphe Guyon, Pierre Devillard, Thierry Martin
Electron injection in a nanotube: noise correlations and entanglement
Physical Review B : Condensed matter and materials physics, American Physical Society, 2003, 67, pp.205408. 〈10.1103/PhysRevB.67.205408〉
Conference paper
T. Martin, A. Crepieux, N. Chtchelkatchev
Noise correlations, entanglement, and Bell inequalities
Y. Nazarov, Y. Blanter. Proceedings of the NATO ARW workshop on Quantum Noise, 2002, Delft, Netherlands. Kluwer, 2002
54 results