Effect of many-body correlations on mesoscopic charge relaxation
- Authors
- Lee, Minchul; Lopez, Rosa; Choi, Mahn-Soo; Jonckheere, Thibaut; Martin, Thierry
- Issue Date
- 12-5월-2011
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.83, no.20
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 83
- Number
- 20
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112452
- DOI
- 10.1103/PhysRevB.83.201304
- ISSN
- 1098-0121
- 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 Gamma*/(h) over bar, where Gamma* is an effective level broadening, and (ii) the zero-frequency resistance deviates from the universal value when the Zeeman splitting is comparable to Gamma*. 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.
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