Issue |
Europhys. Lett.
Volume 69, Number 3, February 2005
|
|
---|---|---|
Page(s) | 424 - 430 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2004-10363-6 | |
Published online | 07 January 2005 |
Mesoscopic Kondo effect of a quantum dot embedded in an Aharonov-Bohm ring with intradot spin-flip scattering
1
Department of Physics and Engineering Physics, Stevens Institute of Technology Hoboken, NJ 07030, USA
2
Department of Physics, Shanghai Jiaotong University 1954 Huashan Road, Shanghai 200030, PRC
3
School of Optoelectronics, Information Science and Technology, Yantai University Yantai, Shandong, PRC
Received:
1
September
2004
Accepted:
24
November
2004
We study the Kondo effect in a quantum dot embedded in a mesoscopic ring taking into account the intradot spin-flip scattering R. Based on the finite-U slave-boson mean-field approach, we find that the Kondo peak in the density of states is split into two peaks by this coherent spin-flip transition, which is responsible for some interesting features of the Kondo-assisted persistent current circulating the ring: 1) strong suppression and crossover to a sine function form with increasing R; 2) appearance of a “hump” in the R-dependent behavior for odd parity. R-induced reverse of the persistent current direction is also observed for odd parity.
PACS: 72.15.Qm – Scattering mechanisms and Kondo effect / 73.23.Ra – Persistent currents / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.