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Wyszukujesz frazę "Hill, G." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Quantum States of Self-Assembled InAs Dots Probed by Magneto-Tunneling Spectroscopy
    Autorzy:
    Patanè, A.
    Eaves, L.
    Main, P. C.
    Levin, A.
    Zambrano, M. L.
    Henini, M.
    Vdovin, E. E.
    Dubrovskii, Y. V.
    Hill, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027456.pdf
    Data publikacji:
    2001-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.63.-b
    73.63.Kv
    73.43.Jn
    Opis:
    We present an experimental study of the electron wave function in InAs/GaAs self-assembled quantum dots. Magneto-tunneling spectroscopy is employed as a non-invasive probe to produce two-dimensional images of the probability density of an electron confined in a quantum dot. The images reveal the elliptical symmetry of the ground state and the characteristic lobes of the higher energy states of the dots.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 2; 165-173
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Breakdown of the Quantum Hall Effect
    Autorzy:
    Maude, D. K.
    Rigal, L. B.
    Desrat, W.
    Potemski, M.
    Portal, J. C.
    Eaves, L.
    Wasilewski, Z. R.
    Toropov, A. I.
    Hill, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027467.pdf
    Data publikacji:
    2001-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.10.Pm
    74.25.Dw
    Opis:
    The breakdown of the dissipationless conductance in the integer and fractional quantum Hall effect regime is reviewed. The temperature dependence of the critical current and of the critical magnetic field at breakdown bears a striking resemblance to the phase diagram of the phenomenological two-fluid Gorter-Casimir model for superconductivity. In addition, a remarkably simple scaling law exists between different filling factors.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 2; 213-226
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic Properties of InAs/GaAs Self-Assembled Quantum Dot Structures and Devices Studied by Photocurrent Spectroscopy
    Autorzy:
    Mowbray, D. J.
    Fry, P. W.
    Skolnick, M. S.
    Itskevich, I. E.
    Harris, L.
    Ashmore, A. D.
    Finley, J. J.
    Wilson, L. R.
    Schumacher, K. L.
    Barker, J. A.
    O'Reilly, E. P.
    Al-Khafaji, M.
    Cullis, A. G.
    Hopkinson, M.
    Clark, J. C.
    Hill, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2014190.pdf
    Data publikacji:
    2000-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.Fd
    73.61.Ey
    73.50.Pz
    42.55.Px
    Opis:
    The power of photocurrent spectroscopy to study the electronic properties of InAs/GaAs self-assembled quantum dots is described. From comparison of results from different samples it is shown that photocurrent provides a direct means to measure absorption spectra of quantum dots. Studies in high electric field enable the electron-hole vertical alignment to be determined. Most surprisingly this is found to be opposite to that predicted by all recent predictions. Comparison with theory shows that this can only be explained if the dots contain significant amounts of gallium, and have a severely truncated shape. The nature of the ground and excited state transitions, carrier escape mechanisms from dots, in-plane wave function anisotropies and the modal gain of a quantum dot laser are determined.
    Źródło:
    Acta Physica Polonica A; 2000, 98, 3; 279-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and testing of power system protection functions using Simulink and EMTP
    Autorzy:
    Sawko, P.
    Hill, K.
    Evans, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/410599.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    model based design
    test automation
    Simulink and EMTP
    Opis:
    This paper presents how simulation of power system behaviour under different disturbances can be used to test protection algorithms. A method for co-simulation using Electromagnetic Transient Program (EMTP) and Simulink is presented along with the procedure used for testing protection algorithms against different power system waveforms. The advantages of model based design are described showing how a realistic model of protection relay can be designed and how individual components are integrated.
    Źródło:
    Present Problems of Power System Control; 2013, 4; 51-65
    2084-2201
    Pojawia się w:
    Present Problems of Power System Control
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on the anatomy and relationships of the Paleocene crocodylian Akanthosuchus langstoni
    Autorzy:
    Hill, R.V.
    Lucas, S.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/20775.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Akanthosuchus langstoni
    Alligatoroidea
    Crocodylia
    holotype
    Paleocene
    anatomy
    dwarfism
    paleontology
    phylogenetic relationship
    phylogenetic analysis
    Opis:
    The phylogenetic relationships of the Paleocene crocodylian Akanthosuchus langstoni are assessed using published data matrices and morphological data from the holotype and referred specimens. Cladistic analyses indicate that Akanthosuchus is unequivocally nested within Alligatoroidea. Weak support from a majority rule consensus tree indicates that Akanthosuchus may be more closely allied with alligatorines than with caimanines, but in the strict consensus tree these relationships remain ambiguous. There is no evidence from phylogenetic analyses to support the hypothesis that Akanthosuchus represents the postcrania of the Paleocene crocodylians Navajosuchus or Ceratosuchus. Growth marks observed in histological sections of osteoderms of the holotype of Akanthosuchus langstoni indicate that it was at least eight years old at the time of death. Although the individual may not have been fully mature at the time of death, lineage dwarfism cannot be ruled out as a possible reason for its relatively small size.
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New mammalian remains from the Late Cretaceous La Colonia Formation, Patagonia, Argentina
    Autorzy:
    Rougier, G W
    Forasiepi, A.M.
    Hill, R.V.
    Novacek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21844.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    mammalian remains
    Late Cretaceous
    La Colonia Formation
    Patagonia
    Argentina
    mammal fauna
    Los Alamitos
    Coloniatherium cilinskii
    Vincelestes
    Mammalia
    Mesungulatidae
    Cretaceous
    new remains
    Campanian
    Maastrichtian
    Opis:
    Knowledge of the latest Late Cretaceous mammalian fauna in the South America was, until now, mostly based on dentally known taxa recovered at Los Alamitos (Río Negro, Argentina). Here we describe new mammalian remains collected in outcrops of the La Colonia Formation (Campanian–Maastrichtian) exposed in Chubut Province, Argentina, warranting the recognition of a new mesungulatid: Coloniatherium cilinskii gen. et sp. nov. The mammalian high−level taxonomic compositions of the localities in the La Colonia Formation and at Los Alamitos are roughly similar (Reigitheriidae, Mesungulatidae, and Ferugliotheridae are represented in both localities), but gondwanatheriids and the more plesiomorphic dryolestoids from Los Alamitos are missing from La Colonia. The most abundant mammalian remains collected at La Colonia correspond to large−sized mesungulatids. Coloniatherium cilinskii is recognized by the dentition and lower jaw, and we assign five isolated petrosal bones, focusing our study primarily on the analysis of the ear regions. The morphology of the petrosals suggests a phylogenetic position similar to Vincelestes, but sharing some derived features, possibly convergent, with therians. Attribution of the petrosals to the mesungulatid Coloniatherium cilinskii is supported by overall morphology, size, and relative abundance among the mammalian remains from La Colonia.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 2; 195-212
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Response of Mn(III)F(salen) at Low Temperatures
    Autorzy:
    Park, J.
    Risset, O.
    Shiddiq, M.
    Peprah, M.
    Knowles, E.
    Andrus, M.
    Beedle, C.
    Ehlers, G.
    Podlesnyak, A.
    Čižmár, E.
    Nagler, S.
    Hill, S.
    Talham, D.
    Meisel, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368508.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    78.70.Nx
    76.30.-v
    75.10.Jm
    Opis:
    The low temperature magnetic response of Mn(III)F(salen), salen = $H_{14}C_{16}N_{2}O_{2}$, an S=2 linear-chain system, has been studied. Using a single crystal with the field applied perpendicular to the chain direction, torque magnetometry, down to 20 mK and up to 18 T, revealed a feature at 3.8 T when T ≤ 400 mK. ESR ( ≈200 GHz) studies, using single crystals at 4 K and in 5 T, have not detected any signal. In 10 mT, the temperature dependence of the susceptibility of powder-like samples can be reasonably fit when J/$k_{B}$=50 K and g=2. In addition, these data are unchanged for P ≤1.0 GPa. Using a randomly-oriented, powder-like, deuterated (12 of 14 H replaced by D) sample of 2.2 g at 270 mK, neutron scattering data, acquired with the Cold Neutron Chopper Spectrometer at the Spallation Neutron Source, show several well defined excitations that may be from the zero-field energy levels of antiferromagnetic S=2 spins with g=2, J/$k_{B}$=50 K, D/$k_{B}$=2.8 K, and E/$k_{B}$=0.5 K.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 228-229
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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