Inhomogeneous boundary effects in semiconductor quantum wires
نویسندگان
چکیده
منابع مشابه
Inhomogeneous boundary effects in semiconductor quantum wires
Abslract Boundary effects play an essential role in determining the physical properties of semiconductor quantum wires. Additional features come into play when one considers inhomogeneous boundaries, i.e. wires whose widths are functions of distance along the length of the wire. We show that, in the adiabatic approximation (which assumes that the boundary patential fluctuation effects, or equiv...
متن کاملBoundary Bound State Effects in Quantum Wires
We investigate the impact of boundary bound states on the dynamics of quantum fields, which propagate on star graphs modeling quantum wires. These states are localized in the vertex of the graph and decay exponentially in the bulk. We demonstrate that their contribution is completely fixed by causality (local commutativity), which represents a key point of our investigation. The boundary bound ...
متن کاملResistivity of inhomogeneous quantum wires.
We study the effect of electron-electron interactions on the transport in an inhomogeneous quantum wire. We show that contrary to the well-known Luttinger liquid result, nonuniform interactions contribute substantially to the resistance of the wire. In the regime of weakly interacting electrons and moderately low temperatures we find a linear in T resistivity induced by the interactions. We the...
متن کاملElectronic transport in inhomogeneous quantum wires
We study the transport properties of a long non-uniform quantum wire where the electron-electron interactions and the density vary smoothly at large length scales. We show that these inhomogeneities lead to a finite resistivity of the wire, due to a weak violation of momentum conservation in the collisions between electrons. Estimating the rate of change of momentum associated with non-momentum...
متن کاملConductance in quantum wires by three quantum dots arrays
A noninteracting quantum-dot arrays side coupled to a quantum wire is studied. Transport through the quantum wire is investigated by using a noninteracting Anderson tunneling Hamiltonian. The conductance at zero temperature develops an oscillating band with resonances and antiresonances due to constructive and destructive interference in the ballistic channel, respectively. Moreover, we have fo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 1992
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/4/48/016