Effect of many-body correlations on mesoscopic charge relaxation

Minchul Lee, Rosa López, Mahn Soo Choi, Thibaut Jonckheere, Thierry Martin

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We investigate nonperturbatively the charge relaxation resistance and quantum capacitance in a coherent RC circuit in the strong-coupling regime. We find that the many-body correlations break the universality in the charge relaxation resistance: (i) The charge relaxation resistance has peaks at finite frequencies Γ*/, where Γ* is an effective level broadening, and (ii) the zero-frequency resistance deviates from the universal value when the Zeeman splitting is comparable to Γ*. This behavior becomes even more prominent in the Kondo regime. The observed features are ascribed to the generation of particle-hole excitations in the contacts accomplished by spin-flip processes in the dot.

Original languageEnglish
Article number201304
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number20
DOIs
Publication statusPublished - 2011 May 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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