Enhanced Two-Channel Kondo Physics in a Quantum Box Device
Artikel i vetenskaplig tidskrift, 2007

We propose a design for a one-dimensional quantum box device where the charge fluctuations are described by an anisotropic two-channel Kondo model. The device consists of a quantum box in the Coulomb blockade regime, weakly coupled to a quantum wire by a single-mode point contact. The electron correlations in the wire produce strong back scattering at the contact, significantly increasing the Kondo temperature as compared to the case of non-interacting electrons. By employing boundary conformal field theory techniques we show that the differential capacitance of the box exhibits manifest two-channel Kondo scaling with temperature and gate voltage, uncontaminated by the one-dimensional electron correlations. We discuss the prospect to experimentally access the Kondo regime with this type of device.

DOT

CONFORMAL FIELD-THEORY

FLUCTUATIONS

EXCITATIONS

COULOMB-BLOCKADE

CHARGE

Författare

Paata Kakashvili

Chalmers, Teknisk fysik

Henrik Johannesson

Göteborgs universitet

Europhysics Letters

0295-5075 (ISSN) 1286-4854 (eISSN)

Vol. 79

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1209/0295-5075/79/47004