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Diamond Sensor Technologies: From Multi Stimulus to Quantum. [PDF]
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Quantum conduction in narrow constrictions
Physical Review B, 1989Quantum conductance of narrow constrictions between two wide two-dimensional regions is obtained by using the recursive transfer-matrix technique to evaluate the Kubo formula exactly. Consistent with recent experimental findings, the conductance is found to be quantized in steps of 2${e}^{2}$/h only under a restricted set of optimal conditions ...
, He, , Das Sarma S
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Conductance fluctuations in quantum wires
Physical Review B, 1991Conductance fluctuations in quantum wires are calculated numerically by a scattering-matrix formalism with Landauer's conductance formula. The fluctuations are not universal because they are strongly dependent on the system length. When many subbands are occupied, there appears the length region (called the universal region) longer than the mean free ...
, Tamura, , Ando
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Quantum Hall conduction in quantum wires
Physica B: Condensed Matter, 1993The nature of quantum Hall conduction in quantum wires is revealed from a numerical study. Whereas the Hall conductivity, σxy for the fixed chemical potential, gives quantum Hall steps, σxy for a fixed number of electrons, as appropriate for mesoscopic systems, an oscillation is exhibited against the Aharonov-Bohm flux Φ with period (12)φ0.
T. Ando, H. Aoki
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Nonuniversal Conductance Quantization in Quantum Wires
Physical Review Letters, 1996We have measured the transport properties of high-quality quantum wires fabricated in GaAs-AlGaAs by using cleaved edge overgrowth. The low temperature conductance is quantized as the electron density in the wire is varied. While the values of the conductance plateaus are reproducible, they deviate from multiples of the universal value of ${2e}^{2}/h ...
, Yacoby +5 more
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Ballistic conductance of a quantum sphere
Journal of Physics A: Mathematical and General, 2002Summary: The conductance of a quantum sphere with two one-dimensional wires attached to it is investigated. An explicit form for the conductance as a function of the chemical potential is found from first principles. The form and positions of the resonance maxima on a plot of the conductance are studied.
Brüning, J. +3 more
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Conductance spectroscopy in coupled quantum dots
Physical Review B, 1994We investigate the linear-response conductance through a pair of coupled quantum dots. The conductance spectrum under ideal conditions is shown to consist of two sets of twin peaks whose locations and amplitudes are determined by the interdot coupling and the intradot charging.
Klimeck, Gerhard +2 more
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Resonant conduction in ballistic quantum channels
Physical Review B, 1989The conductance of a short, narrow ballistic constriction in a two-dimensional electron gas in a semiconductor heterostructure is calculated exactly for a simple but plausible model. A novel phenomenon is predicted: Such quantum channels should exhibit resonant conduction in highmobility samples at low temperatures.
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SPIN FLIP CONDUCTANCE OF QUANTUM NANOCONTACTS
Physics, Chemistry and Application of Nanostructures, 2005The theory of nanosize point contacts made of ferromagnetic metals is developed. A general quantum scattering theory is applied to calculate conductance of the nanocontact with domain wall located in the constriction. Exact solution of the electron motion in the potential of the linear domain wall is used as a zero-order approximation.
Useinov A., Useinov N., Tagirov L.
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Quantum interference and conductance in silicon quantum wires
SPIE Proceedings, 1999We present the findings of quantized conductance (QC), Coulomb staircase (CS) and local tunneling spectroscopy (LTS) techniques which reveal the single-hole confinement and charging phenomena in the smooth and modulated quantum wires created electrostatically inside self-assembly longitudinal (SLQW) and lateral (SLaQW) silicon quantum wells.
Nikolai T. Bagraev +7 more
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