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  • 1
    Electronic Resource
    Electronic Resource
    Magneto-optics of excitons in a center Si δ-doped GaAs/AlGaAs quantum well (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 8502-8505 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Observation of magneto-optical transitions in a Si center δ-doped quantum well is reported. The excitons are stabilized by the application of the field. With photoluminescence excitation spectroscopy (PLE), transitions below the Fermi level are observed. At magnetic fields (approximately-greater-than)8 T broadened Landau levels can be seen. The features in the PLE spectra sharpen up significantly when the Larmor diameter becomes less than the average interimpurity spacing. The effect of the ionized donors in the well on the optical spectra is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353402
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  • 2
    Electronic Resource
    Electronic Resource
    A critique of contact charge spectroscopy (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1957-1963 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We describe further experiments to determine whether the charge transfer to a polymer from a series of metals is additive. We conclude that charge transfer is not additive if all the metals contact the same region. This conclusion remains valid over a wide range of sample preparation methods, and shows that the concept of a charge transfer window and the associated technique of "contact charge spectroscopy'' may be invalid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341750
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of Solid Solutions of Free Radicals at Room Temperature (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 82-83 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The use of solutions at the temperature of liquid nitrogen is not always convenient, so we have investigated the possibility of producing free radicals at room temperature. Instead of using a solvent which freezes to a glass, we tried to create free radicals in a medium which is glass-like at room ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/175082b0
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  • 4
    Electronic Resource
    Electronic Resource
    Free Radical Salts of Halogenated Quinones (1956)
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 1462-1463 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Highly electropositive aromatic diamines can form stable solid paramagnetic salts with simple anions2, for example, the perchlorate of Wurster s ion, (CH3)2 N N(CH3)2]+C104-, and it was interesting to see if there also existed stable salts of quinones with simple cations: O Q O]-Na+ These should ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1781462b0
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  • 5
    Electronic Resource
    Electronic Resource
    Paramagnetic resonance in some molecular compounds; a new class of biradicals (1954)
    Springer
    Naturwissenschaften 41 (1954), S. 303-304 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00638547
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of N 2 on superconductors (1989)
    [s.l.] : Nature Publishing Group
    Nature 338 (1989), S. 383-383 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR—Matthews el al.' reported that the superconducting transition temperature (7) of YBa:Cu,Ov (y—7) ceramic can be increased by exposure to cold gas. Exposure to nitrogen raised 7C by nearly 40 K. Sarma et al.\ however, performed experiments which led them to suggest that this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/338383a0
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  • 7
    Electronic Resource
    Electronic Resource
    Stabilization of Free Radicals by Adsorption: Detection by Paramagnetic Resonance (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 830-831 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To test this idea we adsorbed p-benzoquinhydrone on barium hydroxide octahydrate, using solutions in various non-polar solvents (dioxane, benzene). An intense blue colour appeared on the surface. Solutions of pure p-benzoquinone and pure hydroquinone gave rise to no colour on adsorption, nor was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/174830a0
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  • 8
    Electronic Resource
    Electronic Resource
    Difficult superconductivity (1992)
    [s.l.] : Nature Publishing Group
    Nature 357 (1992), S. 552-552 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gerald Burns admits to having found this book difficult to write. I am not surprised; it has been estimated that 20,000 papers were published on high-temperature superconductivity in the five years after its discovery. To read their titles alone would probably take about 30 hours. Burns is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/357552b0
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  • 9
    Electronic Resource
    Electronic Resource
    PhD in evolution (1976)
    [s.l.] : Nature Publishing Group
    Nature 261 (1976), S. 626-626 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,?Your Editorial "PhD in evolution" (May 27) seems in its penultimate paragraph to reveal a general misconception about the purpose and nature of PhD research. It is assumed that PhD research should provide training for scientists going into industry. This, however, is not the case. The chief ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/261626b0
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  • 10
    Electronic Resource
    Electronic Resource
    A New Method of measuring Susceptibility (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 1082-1082 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using this principle, we have built the magnetic analogue of a Wheat stone bridge, with a permanent magnet as the source of magnetomotive force (Fig. 1). The magnetic detector (D) will register no flux when the reluctances of the four air gaps in the soft iron bridge circuit are equal, since the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1821082a0
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