B
Bogdan R. Bułka
Researcher at Polish Academy of Sciences
Publications - 105
Citations - 1385
Bogdan R. Bułka is an academic researcher from Polish Academy of Sciences. The author has contributed to research in topics: Quantum dot & Kondo effect. The author has an hindex of 21, co-authored 102 publications receiving 1318 citations.
Papers
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Fano and Kondo resonance in electronic current through nanodevices.
Bogdan R. Bułka,P. Stefański +1 more
TL;DR: It is shown that multiple scattering and interference of transmitted waves through both channels lead to Fano resonance associated with Kondo resonance in electronic transport through a quantum dot strongly coupled to electrodes within a model with two conduction channels.
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Current and power spectrum in a magnetic tunnel device with an atomic-size spacer
TL;DR: In this article, the current and its noise in a ferromagnetic double tunnel barrier device with a small spacer particle were studied in the framework of the sequential tunneling approach, and analytical formulas were derived for electron tunneling through the particle containing only a single energy level.
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Coherent electronic transport and Kondo resonance in magnetic nanostructures
Bogdan R. Bułka,S. Lipiński +1 more
TL;DR: In this paper, a coherent electronic transport between two ferromagnetic electrodes separated either by a metallic nanoparticle or by a conducting molecule is considered, and the authors predict a negative magnetoresistance effect, which can be observed for asymmetric magnetic junctions.
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Spin effects in ferromagnetic single-electron transistors
TL;DR: In this article, the influence of discrete energy spectrum of a small central electrode on tunneling current and spin accumulation, charge and spin fluctuations, and on tunnel magnetoresistance is analyzed in detail.
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Superconductivity in the Hubbard model with pair hopping
TL;DR: In this article, the phase diagrams and superconducting properties of the extended Hubbard model with pair hopping interaction were studied for d-dimensional hypercubic lattices, including d=1 and d=$\infty$, by means of the broken symmetry Hartree-Fock approximations and, for d=$ ∞, by the slave-boson mean-field method.