Autor: Takeyama, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Conductance Fluctuations in PbSe: Manifestation of Ballistic Transport in Macroscale?
Autorzy:: Grabecki, G.
Takeyama, S.
Adachi, S.
Takagi, Y.
Dietl, T.
Kamińska, E.
Piotrowska, A.
Papis, E.
Frank, N.
Bauer, G.
Powiązania:: https://bibliotekanauki.pl/articles/1933748.pdf
Data publikacji:: 1995-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Jv
Opis:: Precise magnetoresistance measurements on microstructures of photolithographically patterned PbSe epilayers have been performed in the magnetic field range up to 17 Τ. Unusually large, reproducible magnetoconductance fluctuations have been observed. The fluctuation amplitude decreases exponentially with the magnetic field. A correlation magnetic field of the fluctuations corresponds to the Aharonov-Bohm effect which involves electron trajectories much smaller than the electron mean free path. This points strongly to the ballistic, not diffusive, origin of the observed phenomenon.
Źródło:: Acta Physica Polonica A; 1995, 88, 4; 727-730
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Megagauss Cyclotron Resonance and Quantum Hall Effect of 2D Electron Gas in HgCdMnTe
Autorzy:: Grabecki, G.
Takeyama, S.
Dietl, T.
Takamasu, T.
Shimamotο, Y.
Miura, N.
Powiązania:: https://bibliotekanauki.pl/articles/1933749.pdf
Data publikacji:: 1995-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.25.Hc
73.50.Fq
73.20.Dx
73.40.Lq
Opis:: Two-dimensional electron gas adjacent to a grain boundary in bicrystal of narrow-gap semiconductor p- Hg$\text{}_{0.79}$Cd$\text{}_{0.19}$Mn$\text{}_{0.02}$Te has been studied under ultra strong impulse magnetic fields (up to 140 T). Both cyclotron resonance and quantum Hall effect are measured for the same samples. The values of the resonance fields point to strong nonparabolicity. A broadening of the line is interpreted in terms of an intersubband mixing that occurs for the upper Landau level. A steep increase in the linewidth in the field range 20-30 T, which coincides with a strong decrease in the Hall resistance is assigned to the field-induced metal-insulator transition in our system.
Źródło:: Acta Physica Polonica A; 1995, 88, 4; 731-734
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Hight-Field Submillimeter Magneto-Spectroscopy on Hg(Fe)Se
Autorzy:: Portugall, O.
Von Ortenberg, M.
Yokoi, H.
Takeyama, S.
Miura, N.
Van Bockstal, L.
Herlach, F.
Dobrowolski, W.
Powiązania:: https://bibliotekanauki.pl/articles/1886979.pdf
Data publikacji:: 1991-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.30.Fs
Opis:: Magnetooptical phenomena in the zero-gap semimagnetic semiconductor Hg(Fe)Se are studied by various techniques in pulsed magnetic fields up to 150 T. Microscopical parameters are estimated in combination with results obtained from transport and magnetization measurements.
Źródło:: Acta Physica Polonica A; 1991, 79, 2-3; 363-367
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Exciton Magneto-Optical Study on Single Quantum Wells, Cd$\text{}_{1-x}$Zn$\text{}_{x}$Te/Cd$\text{}_{1-x'-y}$Zn$\text{}_{x}$'Mn$\text{}_{y}$Te
Autorzy:: Takeyama, S.
Grabecki, G.
Adachi, S.
Takagi, Y.
Wojtowicz, T.
Karczewski, G.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1934045.pdf
Data publikacji:: 1995-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.-m
78.20.Ls
78.66.Hf
Opis:: Four-single quantum wells composed of the ternary non-magnetic compounds Cd$\text{}_{0.93}$Zn$\text{}_{0.07}$Te (well width = 13, 19, 40, 90 Å), separated by the quaternary magnetic-compound Cd$\text{}_{0.48}$Zn$\text{}_{0.04}$Mn$\text{}_{0.48}$Te on (100)GaAs substrate were grown by MBE, and exhibited clear and distinctive photoluminescence lines corresponding to each quantum well. Double luminescence peaks with closely spaced within one well were observed from 90 Å and 40 Å quantum wells. Temperature and magnetic-field study revealed characteristic luminescence features associated with a bound exciton near the interface rather than with one monolayer fluctuation.
Źródło:: Acta Physica Polonica A; 1995, 88, 5; 945-948
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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