Universal Conductance Enhancement and Reduction of the Two-Orbital Kondo Effect

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概要

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• We investigate theoretically the linear and nonlinear conductance through a nanostructure with two-fold degenerate single levels, corresponding to the transport through nanostructures such as a carbon nanotube, or double dot systems with capacitive interaction. It is shown that the presence of the interaction asymmetry between orbits/dots affects significantly the profile of the linear conductance at finite temperature, and, of the nonlinear conductance, particularly around half-filling, where the two-particle Kondo effect occurs. Within the range of experimentally feasible parameters, the $SU(4)$ universal behavior is suggested, and comparison with relevant experiments is made.

• Physical Society of Japanの論文
• 2010-05-15

著者

• Taniguchi Nobuhiko

  Institute Of Physics University Of Tsukuba

• Taniguchi Nobuhiko

  Institute of Physics, University of Tsukuba, Tennodai, Tsukuba, Ibaraki 305-8571, Japan

• Oguchi Haruka

  Institute of Physics, University of Tsukuba, Tennodai, Tsukuba, Ibaraki 305-8571, Japan

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• Universal Conductance Enhancement and Reduction of the Two-Orbital Kondo Effect
• Thermal Symmetry Crossover and Universal Behaviors in Carbon Nanotube Dots

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