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Nonequilibrium charge noise and dephasing from a spin-incoherent Luttinger liquid

Fiete, Gregory A. and Kindermann, Markus (2007) Nonequilibrium charge noise and dephasing from a spin-incoherent Luttinger liquid. Physical Review B, 75 (3). Art. No. 035336. ISSN 1098-0121. doi:10.1103/PhysRevB.75.035336.

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We theoretically investigate the charge noise and dephasing in a metallic device in close proximity to a spin incoherent Luttinger liquid with a small but finite current. The frequency dependence of the charge noise exhibits a loss of frequency peaks corresponding to the 2kF part of the density correlations in the electron liquid when the temperature T is increased from values below the magnetic exchange energy J of the electron gas to values above it. The dephasing rate in a nearby metallic nanostructure also shows a crossover for T~J and may exhibit a nonmonotonic temperature dependence. For a range of temperatures the dephasing rate decreases with increasing temperatures. The proposed experiments provide a convenient approach to probe the spin-incoherent Luttinger liquid and should be implementable in a wide variety of systems.

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Additional Information:©2007 The American Physical Society. (Received 29 September 2006; revised 30 November 2006; published 29 January 2007) We thank L. Balents for enlightening discussions. This work was supported by NSF Grant numbers PHY99-07949, DMR04-57440, DMR03-34499, and the Packard Foundation. G.A.F. was also supported by the Lee A. DuBridge Foundation. We gratefully acknowledge the hospitality of the Aspen Center for Physics where part of this work was carried out.
Subject Keywords:Luttinger liquid; strongly correlated electron systems; noise; exchange interactions (electron)
Issue or Number:3
Record Number:CaltechAUTHORS:FIEprb07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7311
Deposited By: Archive Administrator
Deposited On:29 Jan 2007
Last Modified:08 Nov 2021 20:41

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