نتایج جستجو برای: quantum point contact
تعداد نتایج: 947201 فیلتر نتایج به سال:
We study the negative correction to the quantized value 2e(2)/h of the conductance of a quantum point contact due to the backscattering of electrons by acoustic phonons. The correction shows activated temperature dependence and also gives rise to a zero-bias anomaly in conductance. Our results are in qualitative agreement with recent experiments studying the 0.7 feature in the conductance of qu...
We construct a scattering formalism of electrons passing through a quantum point contact that explains the unusual temperature dependence of the 0.7 anomaly. The existence of pronounced fluctuations (“paramagnons”) induced by the exchange interaction in the region of constriction where the density is low and shortrange interaction is enhanced. The spin related backscattering of the electrons ca...
Tantalum oxide memristors can switch continuously from a low-conductance semiconducting to a high-conductance metallic state. At the boundary between these two regimes are quantized conductance states, which indicate the formation of a point contact within the oxide characterized by multistable conductance fluctuations and enlarged electronic noise. Here, we observe diverse conductance-dependen...
Phonon Effects on the Weak Measurement of Charge States in Quantum Dots with a Quantum Point Contact
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