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1
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Equations of Motion for a Charged Particle in n-Dimensional Magnetic Field

100%
Florek W., Thomas M.
Acta Physica Polonica A
|
2000
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vol. 97
|
issue 5
935-938
EN
The equation of motion for a charged particle moving in the n-dimensional constant magnetic field is obtained for any linear gauge and any metric tensor by generalization of Johnson and Lipmann's approach. It allows to consider the magnetic orbits in the n-dimensional space. It is shown that the movement of a particle can always be decomposed into a number of two-dimensional cyclotronic motions and a free particle part.
2
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Tunneling Current into the Vortex Lattice States of s- and p-Wave Superconductors

81%
Kowalewski L., Nogala M., Thomas M., Wojciechowski R.
Acta Physica Polonica A
|
2000
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vol. 97
|
issue 1
237-240
EN
The tunneling current between the metallic tip of a scanning microscope and s-wave and p-wave superconductors in a quantizing magnetic field is investigated. The differential conductance is calculated both as a function of bias voltage at the centre of the vortex line and for varying position of the scanning tunneling microscope tip at a stable voltage.
3
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Heavy Fermion Superconductor Order Parameter in High Magnetic Field

81%
Kowalewski L., Wojciechowski R., Thomas M., Nogala M.
Acta Physica Polonica A
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1994
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vol. 85
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issue 2
347-350
EN
It is shown that, independently on either the nature and the strength of pairing, the orbital effects of a high magnetic field in heavy fermion superconductor change the form of both the effective pairing and the gap function.
4
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Magnetic Ground State of Fullerenes

81%
Koper A., Stankowski J., Thomas M.
Acta Physica Polonica A
|
1994
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vol. 85
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issue 2
351-355
EN
The classical limit of the effective antiferromagnetic Heisenberg Hamiltonian has been investigated on the series of free clusters (molecules) of C_{N} (N = 32, 44, 50, 58, 60,, 70 and 84). The valley structures of the frustrated ground states were determined. Moreover, the probability distributions of the spin correlation functions were calculated.
5
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Properties of the Semi Spin Glass Ground State of Garnets

81%
Koper A., Lehmann-Szweykowska A., Thomas M., Wojciechowski R.
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EN
A strong magnetic ordering response to valence-uncompensated doping observed experimentally in yttrium iron garnet, indicates the importance of a thorough analysis of the problem. Within the framework of the classical two-sublattice Heisenberg model the position on the ground state phase diagram, corresponding to the experimentally found values of the superexchange parameters of yttrium iron garnet, turns out to lie close to the semi spin glass region. Thus, in this paper, the magnetic structure factor, the spectrum of magnetic excitations, the density of states and a magnetic contribution to the specific heat, are calculated and discussed.
6
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Unconventional Superconductivity in Strong Magnetic Field

81%
Kowalewski L., Nogala M. M., Thomas M., Wojciechowski R. J.
Acta Physica Polonica A
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1997
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vol. 91
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issue 2
395-398
EN
The Landau quantization effects are considered in low carrier concentration unconventional spin triplet p-wave superconductors in a high magnetic field region. The field dependence of the superconducting order parameter and the vortex lattice states for intra Landau level pairing are analyzed. The gap functions are calculated within mean field approximation.
7
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Proceedings of the European Conference Physics of Magnetism 96. Preface.

61%
Krompiewski S., Micnas R., Fechner B., Kowalewski L., Morkowski J., Szajek A., Thomas M.
Acta Physica Polonica A
|
1997
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vol. 91
|
issue 1
3-6
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