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Nanophysics

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
Email
Crépieux Adeline University faculty
+33.4.91.26.95.30 Email
Devillard Pierre University faculty
+33.4.91.26.95.23 Email
Jacquet Romain ATER
Email
Jonckheere Thibaut Researcher
+33.4.91.26.95.36 Email
Martin Thierry Director
University faculty
Correspondant LabEx OCEVU
Chef de l’équipe « Nanophysique »
Référent pôle de recherche interdisciplinaire et intersectoriel AMU - Sciences, technologies avancées
+33.4.91.26.95.41 Email
Raymond Laurent University faculty
+33.4.91.28.83.13 Email
Rech Jérôme Researcher
+33.4.91.26.95.34 Email
Ronetti Flavio PhD candidate
Email

List of Publications

54 results
Journal article
Adeline Crépieux, Fedor Simkovic, Benjamin Cambon, Fabienne Michelini
Enhanced thermopower under time-dependent gate voltage
Physical Review B : Condensed matter and materials physics, American Physical Society, 2011, 83 (15), pp.153417. 〈10.1103/PhysRevB.83.153417〉
Journal article
Jérôme Rech, Stefan Kehrein
Measurement back-action on adiabatic coherent electron transport
Physical Review Letters, American Physical Society, 2011, 106, pp.136808. 〈10.1103/PhysRevLett.106.136808〉
Journal article
Arijit Kundu, Alex Zazunov, Alfredo Levy Yeyati, Thierry Martin, Reinhold Egger
Energy spectrum and broken spin-surface locking in topological insulator quantum dots
Physical Review B : Condensed matter and materials physics, American Physical Society, 2011, 83, pp.125429. 〈10.1103/PhysRevB.83.125429〉
Journal article
Alex Levchenko, Tobias Micklitz, Jérôme Rech, K. A. Matveev
Transport in partially equilibrated inhomogeneous quantum wires
Physical Review B : Condensed matter and materials physics, American Physical Society, 2010, 82 (11), pp.115413. 〈10.1103/PhysRevB.82.115413〉
Journal article
Tobias Micklitz, Jérôme Rech, K. A. Matveev
Transport properties of partially equilibrated quantum wires
Physical Review B : Condensed matter and materials physics, American Physical Society, 2010, 81, pp.115313. 〈10.1103/PhysRevB.81.115313〉
Journal article
Jérôme Rech, Tobias Micklitz, K. A. Matveev
Conductance of fully equilibrated quantum wires
Physical Review Letters, American Physical Society, 2009, 102, pp.116402. 〈10.1103/PhysRevLett.102.116402〉
Journal article
Marine Guigou, Thierry Martin, Adeline Crépieux
Screening of a Luttinger liquid wire by a scanning tunneling microscope tip: II. Transport properties
Physical Review B : Condensed matter and materials physics, American Physical Society, 2009, 80, pp.045421. 〈10.1103/PhysRevB.80.045421〉
Journal article
Marine Guigou, Thierry Martin, Adeline Crépieux
Screening of a Luttinger liquid wire by a scanning tunneling microscope tip: I. Spectral properties
Physical Review B : Condensed matter and materials physics, American Physical Society, 2009, 80, pp.045420. 〈10.1103/PhysRevB.80.045420〉
Journal article
Pavel Středa, Thibaut Jonckheere, Jan Kučera
Hall current and electron polarizability of a two-dimensional electron gas subjected to weak superlattice potentials
Physical Review B : Condensed matter and materials physics, American Physical Society, 2007, 76, pp.085310. 〈10.1103/PhysRevB.76.085310〉
Journal article
T. K. T. Nguyen, T. Jonckheere, A. Crépieux, A. V. Nguyen, T. Martin
Photo-assisted Andreev reflection as a probe of quantum noise
Physical Review B : Condensed matter and materials physics, American Physical Society, 2007, 76 (3), pp.035421
54 results

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