Long dephasing time and high temperature ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Long dephasing time and high temperature ballistic transport in an InGaAs quantum dot
Author(s) :
Hackens, Benoit [Auteur]
Faniel, Sébastien [Auteur]
Delfosse, François [Auteur]
Gustin, Cédric [Auteur]
Boutry, Hervé [Auteur]
Huynen, Isabelle [Auteur]
Wallart, Xavier [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bollaert, Sylvain [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Cappy, Alain [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Faniel, Sébastien [Auteur]
Delfosse, François [Auteur]
Gustin, Cédric [Auteur]
Boutry, Hervé [Auteur]
Huynen, Isabelle [Auteur]
Wallart, Xavier [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bollaert, Sylvain [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Cappy, Alain [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Journal title :
Physica E: Low-dimensional Systems and Nanostructures
Pages :
143-146
Publisher :
Elsevier
Publication date :
2003
ISSN :
1386-9477
English keyword(s) :
Quantum dots
Ballistic e>ects
Dephasing
Ballistic e>ects
Dephasing
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
We report on measurements of the magnetoconductance of an open circular InGaAs quantum dot between 1.3 and 204 K.We observe two types of magnetoconductance 5uctuations: universal conductance 5uctuations (UCFs), and ...
Show more >We report on measurements of the magnetoconductance of an open circular InGaAs quantum dot between 1.3 and 204 K.We observe two types of magnetoconductance 5uctuations: universal conductance 5uctuations (UCFs), and “focusing”5uctuations related to ballistic trajectories between openings. The electron phase coherence time extracted from UCFsamplitude is larger than in GaAs/AlGaAs quantum dots and follows a similar temperature dependence (between T −1 andT −2). Below 150 K, the characteristic length associated with “focusing” 5uctuations shows a slightly di>erent temperaturedependence from that of the conductivity.Show less >
Show more >We report on measurements of the magnetoconductance of an open circular InGaAs quantum dot between 1.3 and 204 K.We observe two types of magnetoconductance 5uctuations: universal conductance 5uctuations (UCFs), and “focusing”5uctuations related to ballistic trajectories between openings. The electron phase coherence time extracted from UCFsamplitude is larger than in GaAs/AlGaAs quantum dots and follows a similar temperature dependence (between T −1 andT −2). Below 150 K, the characteristic length associated with “focusing” 5uctuations shows a slightly di>erent temperaturedependence from that of the conductivity.Show less >
Language :
Anglais
Popular science :
Non
Source :
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- http://arxiv.org/pdf/cond-mat/0210093
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