Search
Now showing items 101-120 of 779
Unipolar spin diodes and transistors
(American Institute of Physics, 2000)
Unipolar devices constructed from ferromagnetic semiconducting materials with variable magnetization direction are shown theoretically to behave very similarly to nonmagnetic bipolar devices such as the p-n diode and the ...
Nonlinear Spin-Polarized Transport through a Ferromagnetic Domain Wall
(American Physical Society, 2002)
A domain wall separating two oppositely magnetized regions in a ferromagnetic semiconductor exhibits, under appropriate conditions, strongly nonlinear I-V characteristics similar to those of a p-n diode. We study these ...
Gravitation and Nonlocality
(arXiv, 2001)
The physical basis of the standard theory of general relativity is examined and a nonlocal theory of accelerated observers is described that involves a natural generalization of the hypothesis of locality. The nonlocal theory is confronted...
Heterostructure unipolar spin transistors
(American Institute of Physics, 2005)
We extend the analogy between charge-based bipolar semiconductor electronics and spin-based unipolar electronics by considering unipolar spin transistors with different equilibrium spin splittings in the emitter, base, and ...
Relativity and Nonlocality
(arXiv, 2000)
The basic physical structure of the relativistic theory of gravitation is discussed. The significant role that the Hypothesis of Locality plays in relativity theory is elucidated via the phenomenon of spin-rotation coupling. The limitations...
The resonance counting function for Schrödinger operators with generic potentials
(2005)
We show that the resonance counting function for a Schr¨odinger operator has maximal order of growth for generic sets of real-valued, or
complex-valued, L1-compactly supported potentials.
Spin-Hall Effect in a [110] GaAs Quantum Well
(American Physical Society, 2006)
A self-consistent treatment of the spin-Hall effect requires consideration of the spin- orbit coupling and electron-impurity scattering on equal footing. This is done here for the experimentally relevant case of a [110] ...
Role of Physical Mechanisms in Biological Self-Organization
(American Physical Society, 2005)
Organs form during morphogenesis, the process that gives rise to specialized biological structures of specific shape and function in early embryonic development. Morphogenesis is under strict genetic control, but shape evolution itself is a physical...
Schrödinger equation for the one-particle density matrix of thermal systems: an alternative formulation of Bose-Einstein condensation
(Institute of Physics, 2007)
both with and without the confining trap. The results are in very good agreement with those of the full statistical physics treatment. This is an alternative to the Bose-Einstein condensation in the standard ideal Bose-gas treatment....
Spacetime measurements in Kaluza-Klein gravity
(arXiv, 2000)
We extend the classical general relativistic theory of measurement to include the possibility of existence of higher dimensions. The intrusion of these dimensions in the spacetime interval implies that the inertial mass ...
Modification of the Doppler effect due to the helicity-rotation coupling
(arXiv, 2002)
The helicity-rotation coupling and its current empirical basis are examined. The modification of the Doppler effect due to the coupling of photon spin with the rotation of the observer is considered in detail in connection ...
Disclination unbinding transition in quantum Hall liquid crystals
(American Physical Society, 2001)
We derive the long-wavelength elastic theory for the quantum Hall smectic state starting from the Hartree-Fock approximation. Dislocations in this state lead to an effective nematic model for T>0, which undergoes a ...
Mach's Principle
(arXiv, 2008)
We briefly review the history of Mach's principle and discuss its significance in the light of modern physics....
Dissipation through spin Coulomb drag in electronic spin dynamics
(arXiv, 2005)
Spin Coulomb drag (SCD) constitutes an intrinsic source of dissipation for spin currents in metals and semiconductors. We discuss the power loss due to SCD in potential spintronics devices and analyze in detail the associated ...
Millimeter Laser Ranging to the Moon: a comprehensive theoretical model for advanced data analysis
(arXiv, 2009)
Lunar Laser Ranging (LLR) measurements are crucial for advanced exploration of the evolutionary history of the lunar orbit, the laws of fundamental gravitational physics, selenophysics and geophysics as well as for future human missions to the Moon...
Finite Width and Local Field Corrections to Spin Coulomb Drag in a Quasi-Two-Dimensional Electron Gas
(American Physical Society, 2008)
We study the spin Coulomb drag in a quasi-two-dimensional electron gas of finite transverse width, including local field corrections beyond the random phase approximation (RPA). We find that the finite transverse width of ...
Motional Coherence in Fluid Phospholipid Membranes
(American Physical Society, 2008)
We report a high energy-resolution neutron backscattering study, combined with in situ diffraction, to investigate slow molecular motions on nanosecond time scales in the fluid phase of phospholipid bilayers of ...
Spin-Polarized Two-Dimensional Electron Gas at Oxide Interfaces
(American Physical Society, 2008)
The possibility of formation of a fully spin-polarized 2D electron gas at the SrMnO3/(LaMnO3)1/ SrMnO3 heterostructure is predicted from density-functional calculations. The La(d) electrons become confined in the direction ...
Beyond the standard IAU framework
(Cambridge university Press, 2010)
We discuss three conceivable scenarios of extension and/or modification of the IAU relativistic resolutions on time scales and spatial coordinates beyond the Standard IAU Framework. These scenarios include: (1) the formalism ...
Failure of the local density approximation in time-dependent spin density functional theory
(arXiv, 2002)
that a much more severe nonlocality problem, with a completely different physical origin, plagues the exchange-correlation potentials in time-dependent spin density functional theory. We show how the use of the spin current density as the basic variable...