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- W1999059968 abstract "We investigate the transmission of electrons through a quantum point contact by using a quasi-one-dimensional model with an extra local bound state staying below the band bottom. While the complete transmission in lower channels gives rise to plateaus of conductance at multiples of 2e2/h, the electrons in the lowest channel are scattered by the local bound state when it is singly occupied. This scattering produces a wide anti-resonant zero-transmittance for singlet formed by tunneling and local electrons, and has no effect on triplets, leading to an exact 0.75(2e2/h) shoulder prior to the first 2e2/h plateau. While at low temperature, the formation of Kondo cloud screens magnetic moment of the local bound state and reduces the scattering to the singlet channel, complementing the shoulder from 0.75 to 1." @default.
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- W1999059968 date "2011-08-01" @default.
- W1999059968 modified "2023-10-15" @default.
- W1999059968 title "Anti-resonance and the “0.7 anomaly” in conductance through a quantum point contact" @default.
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- W1999059968 doi "https://doi.org/10.1016/j.physleta.2011.07.015" @default.
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