Tunneling spectroscopy of quantum wires: Spin-charge separation and localization

Autor:	Amir Yacoby, Ken W. West, Hadar Steinberg, Kirk W. Baldwin, Bertrand I. Halperin, L. N. Pfeiffer, Yaroslav Tserkovnyak, Ophir M. Auslaender
Rok vydání:	2006
Předmět:	Spin–charge separation Condensed matter physics Chemistry Ballistic conduction Many-body theory Coulomb Charge (physics) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Quantum Quantum tunnelling Electronic Optical and Magnetic Materials Spin-½
Zdroj:	physica status solidi (b). 243:3593-3603
ISSN:	1521-3951 0370-1972
DOI:	10.1002/pssb.200642223
Popis:	Using a double wire geometry we probe the quantum many-body modes in ballistic wires and their dependence on Coulomb interactions. The wires are fabricated using the cleaved edge overgrowth method. We clearly observe two spin modes and one charge mode of the coupled wires. We map the dispersion velocities of the modes down to a critical density at which spontaneous localization is observed. Theoretical calculations of the charge velocity agree well with the data, although they also predict an additional charge mode that is not observed. Surprisingly, the suppression of the spin velocities does not depend on density. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1b48985be657a11aab1daece25879527 https://doi.org/10.1002/pssb.200642223 Zobrazit plný text záznamu Plný text