Orbital Kondo spectroscopy in a double quantum dot system
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...
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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...
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S. Sasaki,1,* S. Kang,2,3 K. Kitagawa,4,3 M. Yamaguchi,1,3 S. Miyashita,5 T. Maruyama,5 H. Tamura,1,3 T. Akazaki,1,3 Y. Hirayama,1,6 and H. Takayanagi1,4,3 1NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan 2Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan 3CREST-JST, Honmachi, Kawaguchi, Saitama 331-0012, Japan 4Faculty of Science, ...
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We report measurements of the Kondo effect in a double quantum dot, where the orbital states act as pseudospin states whose degeneracy contributes to Kondo screening. Standard transport spectroscopy as a function of the bias voltage on both dots shows a zero-bias peak in conductance, analogous to that observed for spin Kondo in single dots. Breaking the orbital degeneracy splits the Kondo reson...
متن کاملSupplementary Information for Pseudospin Resolved Transport Spectroscopy of the Kondo Effect in a Double Quantum Dot
For all the measurements reported in the main text of this paper, we have made the voltages on the gates labeled CU and CL sufficiently negative so as to suppress inter-dot tunneling. We have confirmed that the inter-dot tunneling is negligibly small over a range of gate voltage settings. To check the inter-dot tunneling, we have measured the conductance of the dots in series, as shown in Fig. ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2013
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.88.235427