Dephasing in metals by two-level systems in the 2-channel kondo regime

A. Zawadowski, Jan Von Delft, D. C. Ralph

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

We point out a novel, nonuniversal contribution to the dephasing rate I/τφ = γφ of conduction electrons in metallic systems: scattering off nonmagnetic two-level systems (TLSs) having almost degenerate Kondo ground states. In the regime Δren <T <TKren = renormalized level splitting, T K = Kondo temperature), such TLSs exhibit non-Fermi-liquid physics that can cause γφ, which generally decreases with decreasing T, to seemingly saturate in a limited temperature range before vanishing for T → 0. This could explain the saturation of dephasing recently observed in gold wires [Mohanty et al, Phys. Rev. Lett. 78, 3366 (1997)].

Original languageEnglish
Pages (from-to)2632-2635
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number13
Publication statusPublished - Sep 27 1999

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metals
conduction electrons
wire
gold
saturation
physics
ground state
temperature
causes
liquids
scattering

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  • Physics and Astronomy(all)

Cite this

Dephasing in metals by two-level systems in the 2-channel kondo regime. / Zawadowski, A.; Von Delft, Jan; Ralph, D. C.

In: Physical Review Letters, Vol. 83, No. 13, 27.09.1999, p. 2632-2635.

Research output: Contribution to journalArticle

Zawadowski, A. ; Von Delft, Jan ; Ralph, D. C. / Dephasing in metals by two-level systems in the 2-channel kondo regime. In: Physical Review Letters. 1999 ; Vol. 83, No. 13. pp. 2632-2635.
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