Orbital and spin Kondo effects in a double quantum dot
نویسندگان
چکیده
منابع مشابه
Orbital and spin Kondo effects in a double quantum dot
– Motivated by recent experiments, in which the Kondo effect has been observed for the first time in a double quantum-dot structure, we study electron transport through a system consisting of two ultrasmall, capacitively-coupled dots with large level spacing and charging energy. Due to strong interdot Coulomb correlations, the Kondo effect has two possible sources, the spin and orbital degenera...
متن کاملMagnetic field dependence of the spin- 2 and spin-1 Kondo effects in a quantum dot
C. H. L. Quay,1 John Cumings,1,* S. J. Gamble,2 R. de Picciotto,3 H. Kataura,4 and D. Goldhaber-Gordon1 1Physics Department, Stanford University, Stanford, California 94305-4060, USA 2Applied Physics Department, Stanford University, Stanford, California 94305-4090, USA 3Bell Laboratories, Alcatel Lucent, Murray Hill, New Jersey 07974, USA 4Nanotechnology Research Institute, National Institute o...
متن کاملTunable Kondo physics in a carbon nanotube double quantum dot.
We investigate a tunable two-impurity Kondo system in a strongly correlated carbon nanotube double quantum dot, accessing the full range of charge regimes. In the regime where both dots contain an unpaired electron, the system approaches the two-impurity Kondo model. At zero magnetic field the interdot coupling disrupts the Kondo physics and a local singlet state arises, but we are able to tune...
متن کاملKondo effect in side coupled double quantum-dot molecule
Electron tunneling through a double quantum dot molecule side attached to a quantum wire, in the Kondo regime, is studied. The mean-field finite-U slave-boson formalism is used to obtain the solution of the problem. We found conductance cancelations when the molecular energies of the side attached double quantum-dot cross the Fermi energy. We investigate the many body molecular Kondo states as ...
متن کاملLinear Kondo conductance in a quantum dot
In a tunneling experiment across a quantum dot it is possible to change the coupling between the dot and the contacts at will, by properly tuning the transparency of the barriers and the temperature. Gate voltages allow for changes of the relative position of the dot addition energies and the Fermi level of the leads. Here we discuss the two limiting cases: weak and strong coupling in the tunne...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 2001
ISSN: 0295-5075,1286-4854
DOI: 10.1209/epl/i2001-00301-2