Autor: Dorosinets, V. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ultrafast Optical and Magneto-Optical Dynamics in Colossal-Magnetoresistance Manganites
Autorzy:: Dorosinets, V.
Richter, P.
Jakob, G.
Roskos, H. G.
Powiązania:: https://bibliotekanauki.pl/articles/2041730.pdf
Data publikacji:: 2005-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.+p
Opis:: Transient pump-probe reflectance measurements on La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$/MgO and La$\text{}_{0.67}$ Ca$\text{}_{0.33}$MnO$\text{}_{3}$/SrTiO$\text{}_{3}$ thin films reveal a hitherto unknown magnetization-dependent energy gap that determines the relaxation process of the optically excited charge carriers on the picosecond time scale. In the case of La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$/SrTiO$\text{}_{3}$, the subsequent reflectance dynamics at low temperatures is determined to be substrate-induced strain that drives the sample into a metastable state characterized by an increased number of paramagnetic domains.
Źródło:: Acta Physica Polonica A; 2005, 107, 1; 211-214
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Investigation of Quantum Effects in Carbonaceous Materials Near the Metal-Insulator Transition by Means of THz Photoconductivity
Autorzy:: Dorosinets, V.
Ksenevich, V.
Seliuta, D.
Martūnas, Z.
Valušis, G.
Powiązania:: https://bibliotekanauki.pl/articles/1813203.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.30.+h
72.15.Rn
Opis:: A series of carbonaceous fibers with conductivity tuned to the metal-insulator transition were prepared by heat treatment of chemically modified polymer precursors. Peculiar behaviour of the resistivity versus temperature dependence R(T) at low temperatures suggests quantum corrections to the Drude conductivity due to weak localization and electron-electron interaction dominating in the conductivity. The THz conductivity method is employed to study the modification of the density of states and provides evidence for a strong change in density of states at the Fermi level caused by the quantum effects.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 875-878
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Electrical Properties and Magnetoresistance of Nanogranular $SnO_2$ Films
Autorzy:: Ksenevich, V.
Dovzhenko, T.
Dorosinets, V.
Bashmakov, I.
Melnikov, A.
Wieck, A.
Powiązania:: https://bibliotekanauki.pl/articles/1813403.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.43.Qt
73.50.Fq
Opis:: Magnetotransport properties of the nanogranular $SnO_2$ films were invesigated. Non-linear current-voltage (I-V) characteristics were observed at low temperatures. The temperature dependence of the resistance and non-ohmic I-V curves can be well approximated by fluctuation-induced tunnelling model, indicating importance of the contacts barriers between $SnO_2$ grains. Magnetoresistance was measured within temperature range 2-15.3 K and could be consistent with the variable-range hopping conduction mechanism due to existence of localized states on the surface of $SnO_2$ grains.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 1043-1046
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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