Pii: S0022-3697(00)00039-1
نویسندگان
چکیده
A method is presented for solving the Bloch equation for Morse potential, based on the application of Fourier transformation of the density matrix. The results obtained agree completely with the results obtained by other methods, however its advantage lies in its elegance and intuitivity of the approach. q 2000 Elsevier Science Ltd. All rights reserved.
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Pii: S0022-3697(99)00039-6
A summary of some recent results of neutron scattering studies of high temperature superconductors is given, with a focus on resonant spin excitations in the superconducting states of YBa2Cu3O61x and Bi2Sr2CaCu2O81d . The opportunities offered by advances in neutron scattering instrumentation, such as focusing and polarization techniques, for these experiments are discussed. q 1999 Published by...
متن کاملPii: S0022-3697(00)00068-8
The effects of lattice relaxation on the deep levels due to substitutional impurities in semiconductors are investigated using an extension of a previously developed formalism. Both ®rstand second-neighbor relaxation are included in the formalism. Using this method, deep level chemical trends and their trends with varying amounts of lattice relaxation are explored. For speci®c impurities, molec...
متن کاملPii: S0022-3697(99)00313-3
A variational method for many-electron system is applied to momentum distribution calculations. The method uses a generating two-electron geminal and the amplitudes of the occupancies of one particle natural orbitals as variational parameters. It introduces correlation effects beyond the free fermion nodal structure. q 2000 Elsevier Science Ltd. All rights reserved.
متن کاملPii: S0022-3697(99)00337-6
We describe the design of an instrument for the investigation of sample dynamics: the SPring-8 High Resolution Beamline (BL35XU). The primary purpose of the beamline is high resolution (,meV) inelastic X-ray scattering measurements. The secondary purpose is nuclear resonant scattering measurements. Construction of the beamline will begin in the summer of 1999 and commissioning will start in the...
متن کاملPii: S0022-3697(98)00144-9
In this paper, we review some of the work our group has done in the past few years to obtain the electron self-energy of high temperature superconductors by analysis of angle-resolved photoemission data. We focus on three examples which have revealed: (1) a d-wave superconducting gap, (2) a collective mode in the superconducting state, and (3) pairing correlations in the pseudogap phase. In eac...
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