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Quantum wires are artificial structures characterized by nanoscale
cross sections that contain charged particles moving along a single
degree of freedom. With electronic motions constrained into
standing modes along with the two other spatial directions, they
have been primarily investigated for their unidimensional dynamics
of quantum-confined charge carriers, which eventually led to broad
applications in large-scale nanoelectronics. This book is a
compilation of articles that span more than 30 years of research on
developing comprehensive physical models that describe the physical
properties of these unidimensional semiconductor structures. The
articles address the effect of quantum confinement on lattice
vibrations, carrier scattering rates, and charge transport as well
as present practical examples of solutions to the Boltzmann
equation by analytical techniques and by numerical simulations such
as the Monte Carlo method. The book also presents topics on quantum
transport and spin effects in unidimensional molecular structures
such as carbon nanotubes and graphene nanoribbons in terms of
non-equilibrium Green’s function approaches and density
functional theory.
Presents a comprehensive study of the physical models for quantum
dots (QDs) Discusses the properties of QDs and their applications
Suggests ways to fine tune the electronic properties of QDs for
specific applications Will be helpful for solid state physicists,
material scientists, and engineers
The success of spintronics - the science and technology of storing,
processing, sensing and communicating information using the quantum
mechanical spin degree of freedom of an electron - is critically
dependent on the ability to inject, detect and manipulate spins in
semiconductors either by incorporating ferromagnetic materials into
device architectures or by using external magnetic and electric
fields. In spintronics, the controlled generation and manipulation
of spin polarization in nonmagnetic semiconductors is required for
the design of spin-sensitive devices ranging from spin-qubit hosts,
quantum memory and gates, quantum teleporters, spin polarizers and
filters, spin-field-effect-transistors, and spin-splitters, among
others. One of the major challenges of spintronics is to control
the creation, manipulation, and detection of spin polarized
currents by purely electrical means. Another challenge is to
preserve spin coherence in a device for the longest time or over
the longest distance in order to produce reliable spintronic
processors. These challenges remain daunting, but some progress has
been made recently in overcoming some of the steepest obstacles.
This book covers some of the recent advances in the field of
spintronics using semiconductors.
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