Kondo effect in coupled quantum dots under magnetic fields
| dc.creator | Aono, Tomosuke | |
| dc.creator | Eto, Mikio | |
| dc.date | 2001-04-05 | |
| dc.date.accessioned | 2026-07-07T02:40:57Z | |
| dc.date.available | 2026-07-07T02:40:57Z | |
| dc.description | The Kondo effect in coupled quantum dots is investigated theoretically under magnetic fields. We show that the magnetoconductance (MC) illustrates peak structures of the Kondo resonant spectra. When the dot-dot tunneling coupling $V_C$ is smaller than the dot-lead coupling $Δ$ (level broadening), the Kondo resonant levels appear at the Fermi level ($E_F$). The Zeeman splitting of the levels weakens the Kondo effect, which results in a negative MC. When $V_{C}$ is larger than $Δ$, the Kondo resonances form bonding and anti-bonding levels, located below and above $E_F$, respectively. We observe a positive MC since the Zeeman splitting increases the overlap between the levels at $E_F$. In the presence of the antiferromagnetic spin coupling between the dots, the sign of MC can change as a function of the gate voltage. | |
| dc.description | 6 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0104091 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0104091 | |
| dc.identifier | Phys. Rev. B 64, 073307 (2001) | |
| dc.identifier | doi:10.1103/PhysRevB.64.073307 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17566 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Kondo effect in coupled quantum dots under magnetic fields | |
| dc.type | text |