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The Fermi surface and cyclotron masses of the ErGa 3 ErGa 3 compound are studied by means of the de Haas–van Alphen technique under pressure. Concurrently, the electronic structure is calculated ab initio for the ferromagnetic phase of ErGa 3 . ErGa 3 . The experimental data have been analyzed...
The results of a detailed theoretical analysis of coupling of weakly damped electromagnetic and acoustic waves in metals are presented. The main difference between the natures of coupling of modes propagating in the same (helicon–phonon resonance) or opposite (doppleron– phonon resonance)...
The ferromagnetic state of the itinerant compound UFe 2 UFe 2 correlated with a peak in the density of states at the Fermi level is well known to be strongly suppressed by replacing Fe with other 3 d 3 d elements. To separate the effect of change in filling of the band from that of its...
We report the results of the superconducting and kinetic parameter measurements (transition temperature T c , T c , parallel and perpendicular critical fields H c 2 , H c 2 , resistivity in the normal state) on a set of Mo/Si superconducting superlattices with a constant metal layer thickness d...
Spectral parameters of the Raman scattering band corresponding to intrinsic vibration ν 2 ( A 1 ) ν 2 ( A 1 ) of the PO 4 PO 4 tetrahedron in mixed crystals of K 1− x A x DP K 1 − x A x DP with various ammonium concentrations are studied in the temperature range 4.2–300 K. Abrupt changes...
The problem of the robust de Haas–van Alphen oscillations seen experimentally in mixed superconducting state is discussed. The new threshold mechanism is suggested to explain persistence of the quantum oscillations deep in the superconducting state. © 1999 American Institute of Physics.
The spatially homogeneous spin dynamics of the superfluid 3 He- B 3 He - B with dissipation is considered for the general spin-orbital configurations. It is demonstrated that the possibility of new coherent spin-precessing modes appears explicitly in the equations of motion describing the...
Exact analytic expressions for local densities of atoms of the system as functions of the distance to a defect as well as defect parameters (variations of mass and force constants) are derived for an semi-infinite linear chain with an impurity at the end as well as for an infinite linear chain...
A generic Hamiltonian, which incorporates the effect of the orbital contraction on the hopping amplitude between nearest sites, is studied both analytically at the weak coupling limit and numerically at the intermediate and strong coupling regimes for a finite atomic cluster. The effect of the...
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