Physics & Atmospheric Science: Recent submissions
Now showing items 261-280 of 532
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Analytical structure of the wave-number-dependent susceptibility of many-fermion systems at low temperature and long wavelength. II
(1980-10/15)For pt.I see ibid., vol.15, p.1523 (1977). It is shown that the nonanalytic structure of the wave-number-dependent susceptibility noted by Geldart and Rasolt is not removed by including repeated particle-particle scattering -
Temperature dependent resistivity in the low-resistance region for diffusive transport in two dimensions
(APS through AIP, 2004-12/15)The interpretation of the metal-insulator transition phenomena in disordered two-dimensional electron systems in terms of density-dependent scaling variables suggests the existence of a quantum critical point at some ... -
Quantum critical behavior in the insulating region of the two-dimensional metal-insulator transition
(American Physical Society by AIP, 2007-11/15)We show that the quantum critical point associated with the metal-insulator transition phenomenon in two dimensions controls an extended critical region encompassing not only the usual quantum critical sector but also a ... -
Density dependence of critical magnetic fields at the metal-insulator bifurcation in two dimensions
(APS through AIP, 2003-01/15)The density dependence of the critical in-plane magnetic field Bc at the bifurcation of the resistivity of two-dimensional electron systems with low levels of disorder is determined using the spin-polarization dependence ... -
Anisotropy of the critical magnetic susceptibility of gadolinium
(1989-06/05)The magnetic susceptibility along the c axis (xc) and in the basal plane (xb) has been measured on a single crystal of Gd in the reduced temperature range 410-4t1.310-2. Uniaxial anisotropy is observed. Magnetic dipole-dipole ... -
Surface-induced quantum density oscillations in the presence of an external magnetic field
(1985-03/15)The electron number density and spin density near the surface of a model metal, semimetal, or semiconductor are calculated in the presence of a uniform magnetic field. The magnetic field is applied in a direction perpendicular ... -
Dipole-dipole interactions and the critical resistivity of gadolinium
(1987-06/01)Results are presented for the electrical resistivity of a c-axis single crystal of high-purity gadolinium metal in the immediate vicinity of the Curie temperature. Numerical analysis reveals that the data are not well ... -
Effect of finite mean free path on spin-flip scattering rates near the critical point of magnetically ordered systems
(1985)The finite electron mean free path of conduction electrons is found to play an important role in determining spin-flip scattering rates, 1/sf, near a magnetic critical point. Small-momentum-transfer processes are suppressed ... -
Convergence properties as a function of spatial dimensionality of gradient expansions for the ground-state energy of an inhomogeneous electron gas
(1986-02/15)The extended Thomas-Fermi approximation for the ground-state energy of a many-fermion system is generalized to arbitrary spatial dimension. The authors' objective is a better understanding of convergence properties of such ... -
Short-distance expansion for the spin-spin correlation function of uniaxial dipolar systems
(1992-03/01)Motivated by recent work on the critical resistivity of gadolinium, a detailed study has been made of the temperature dependence of the two-point vertex function in the large-momentum regime. The operator-project expansion ... -
Influence of the envelope function on the ground-state energy of quasi-two-dimensional Wigner solids
(1992-10/15)At sufficiently low density, quasi-two-dimensional electron systems in their ground state form Wigner solids. In previous studies of the ground-state energy of such systems (in the absence of an applied magnetic field), ... -
Lattice sums for dipolar systems
(1987-12/01)A general method for the evaluation of lattice sums determining the effective parameters in the Hamiltonian of a dipolar magnetic system is described. The anisotropy of the Hamiltonian is examined for crystal structures ... -
Anharmonicity and cross section for absorption of radiation by water dimer
(AIP, 1998-04/01)We calculate the absorption cross section of water dimer molecules in thermal equilibrium at temperatures typical of the lower atmosphere using quantum mechanical coupled nonlinear equations of motion. Empirical Morse-oscillator ... -
Negative electron-electron drag between narrow quantum Hall channels
(APS through AIP, 1998-03/15)Momentum transfer due to Coulomb interaction between two parallel, two-dimensional, narrow, and spatially separated layers, when a current Idrive is driven through one layer, is studied in the presence of a perpendicular ... -
Diamagnetic susceptibility of a dense electron gas
(1988-02/15)The authors calculate the diamagnetic susceptibility of a uniform interacting electron gas in the random-phase approximation. From this the exact high-density expansion of the diamagnetic susceptibility is obtained -
Motion of a point dipole in an infinite hole through a superconductor
(1993-08/01)The authors consider the system of a magnetic point dipole placed in an infinite square hole through a superconductor. Using the method of images they obtain the potential and the field distribution in the hollow. Using ... -
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Theory of impurity-concentration dependence of freezing temperatures of metallic spin glasses
(1992-08/01)The authors present a theory of the freezing temperature Tg of metallic spin glasses. Length scales associated with intrinsic sd scattering and finite temperature play essential roles. They describe an approach in which ... -
Plasmons in disordered, two-component, quasi-two-dimensional electron systems
(1989-08/15)The authors investigate the effect of elastic scattering of electrons on the properties of plasmons in a disordered, two-component, quasi-two-dimensional electron gas. Numerical results are given for dispersion relations ... -
Indirect-Exchange Interactions in Disordered Metals at Finite Temperature
(1992-09)No abstract available.