Coulomb blockade and quantum critical points in quantum dots
نویسندگان
چکیده
منابع مشابه
Coulomb blockade and Quantum Critical Points in Quantum Dots
An ultrasmall quantum dot coupled to a lead and to a quantum box (a large quantum dot) is investigated. Tuning the tunneling amplitudes to the lead and box, we find a line of unstable non-Fermi-liquid fixed points as function of the gate potentials of the quantum dots, extending to arbitrary charging energies on the small and large quantum dots. These quantum-critical fixed points possess a fin...
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In the resonant tunnelling diode we have treated electrons as non interacting particles. We have discussed their wave nature, which led to quantized energy states in small and coherent cavities. Qualitatively this is due to the requirement that an integer number of Fermi wavelengths has to fit between the barriers. Here we begin in the opposite limit by neglecting space quantization effects in ...
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A few years ago, Professor Kastner's research group discovered that the conductance through a quantum dot weakly coupled to the leads shows periodic peaks as a function of the voltage on a gate electrode. 1 This behavior was attributed to the phenomenon of Coulomb blockade: to add an electron to the dot, the system must have an energy equal to the electrostatic energy of a dot charged by one el...
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ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 2005
ISSN: 0921-4526
DOI: 10.1016/j.physb.2005.01.427