8.6k citations
- Polish Academy of SciencesPL234 papers
- Institute of Molecular Physics of the Polish Academy of SciencesPL159 papers
- Centre National de la Recherche ScientifiqueFR113 papers
- University of MichiganUS94 papers
- RIKENJP89 papers
- European Southern ObservatoryCL83 papers
- Palacký University OlomoucCZ77 papers
- University of EdinburghGB74 papers
- Nicolaus Copernicus Astronomical CenterPL73 papers
- Royal ObservatoryGB73 papers
- University of WarsawPL72 papers
- Institute of PhysicsPL68 papers
13 papers · 1 filter
RR Lyrae Variables in the Globular Cluster M55. The First Evidence for Non Radial Pulsations in RR Lyr Stars
A. Olech, J. Kaluzny, I. B. Thompson +3
We present the results of a photometric study of RR Lyrae variables in the field of the globular cluster M55. We have discovered nine new RR Lyrae stars, increasing the number of k…
Glassy transition and metastability in four-spin Ising model
A. Lipowski, D. Johnston
Using Monte Carlo simulations we show that the three-dimensional Ising model with four-spin (plaquette) interactions has some characteristic glassy features. The model dynamically…
Spin effects in single-electron tunneling in magnetic junctions
J. Martinek, J. Barnas, G. Michalek +2
Spin dependent single electron tunneling in ferromagnetic double junctions is analysed theoretically in the limit of sequential tunneling. The influence of discrete energy spectrum…
Power density spectrum of NGC 5548 and the nature of its variability
B. Czerny, A. Schwarzenberg-Czerny, Z. Loska
We derive power density spectra in the optical and X-ray band in the timescale range from several years down to a day. We suggest that the optical power density spectrum co…
Ground state of the spin-1/2 Heisenberg antiferromagnet on a two-dimensional square-hexagonal-dodecagonal lattice
Piotr Tomczak, J. Richter
Up to now, the existence of the the magnetic Neel Long Range Order (NLRO) in nearest neighbor, spin-1/2 antiferromagnetic (AF) lattice systems has been examined for seven, from the…
Superconductivity in the Hubbard model with pair hopping
Stanislaw Robaszkiewicz, Bogdan R. Bulka
The phase diagrams and superconducting properties of the extended Hubbard model with pair hopping interaction, i.e. the Penson-Kolb-Hubbard model are studied. The analysis of the m…