Direct measurement of the phase coherence length in a GaAs/GaAlAs square network

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dc.creatorFerrier, Meydi
dc.creatorAngers, Lionel
dc.creatorGueron, Sophie
dc.creatorBouchiat, Helene
dc.creatorTexier, Christophe
dc.creatorMontambaux, Gilles
dc.creatorMailly, Dominique
dc.creatorRowe, Alistair C. H.
dc.date2004-02-20
dc.date2005-02-15
dc.date.accessioned2026-07-07T02:56:35Z
dc.date.available2026-07-07T02:56:35Z
dc.descriptionThe low temperature magnetoconductance of a large array of quantum coherentloops exhibits Altshuler-Aronov-Spivak oscillations which periodicitycorresponds to 1/2 flux quantum per loop.We show that the measurement of the harmonics content in a square networkprovides an accurate way to determine the electron phase coherence length$L\_ϕ$ in units of the lattice length without any adjustableparameters.We use this method to determine $L\_ϕ$ in a network realised from a 2Delectron gas (2DEG) in a GaAS/GaAlAs heterojunction. The temperaturedependence follows a power law $T^{-1/3}$ from 1.3 K to 25 mK with nosaturation, as expected for 1D diffusive electronic motion andelectron-electron scattering as the main decoherence mechanism.
dc.descriptionAdditional experimental data in version 2
dc.identifierhttps://arxiv.org/abs/cond-mat/0402534
dc.identifierhttp://arxiv.org/abs/cond-mat/0402534
dc.identifierPhysical Review Letters 93 (2004) 246804
dc.identifierdoi:10.1103/PhysRevLett.93.246804
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23383
dc.subjectMesoscale and Nanoscale Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleDirect measurement of the phase coherence length in a GaAs/GaAlAs square network
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