6,000 research outputs found
Exciton-relaxation dynamics in lead halides
We survey recent comprehensive studies of exciton relaxation in the crystals
of lead halides. The luminescence and electron-spin-resonance studies have
revealed that excitons in lead bromide spontaneously dissociate and both
electrons and holes get self-trapped individually. Similar relaxation has been
also clarified in lead chloride. The electron-hole separation is ascribed to
repulsive correlation via acoustic phonons. Besides, on the basis of the
temperature profiles of self-trapped states, we discuss the origin of
luminescence components which are mainly induced under one-photon excitation
into the exciton band in lead fluoride, lead chloride, and lead bromide.Comment: REVTeX, 5 pages, 5 figure
Supersymmetric Adler Functions and Holography
We perform several tests on a recent proposal by Shifman and Stepanyantz for
an exact expression for the current correlation functions in supersymmetric
gauge theories. We clarify the meaning of the relation in superconformal
theories. In particular we show that it automatically follows from known
relations between the current correlation functions and anomalies. It therefore
also automatically matches between different dual realizations of the same
superconformal theory. We use holographic examples as well as calculations in
free theories to show that the proposed relation fails in theories with mass
terms.Comment: 13 page
Photoacoustic wave propagating from normal into superconductive phases in Pb single crystals
Photoacoustic (PA) wave has been examined in a superconductor of the first
kind, Pb single crystal. The PA wave is induced by optical excitation of
electronic state and propagates from normal into superconductive phases below
T. It is clearly shown by wavelet analysis that the measured PA wave
includes two different components. The high-frequency component is
MHz-ultrasonic and the relative low-frequency one is induced by thermal wave.
The latter is observed in a similar manner irrespective of T. On the
other hand, the MHz-frequency component is obviously enhanced below T. The behavior is reproduced by the change of attenuation of longitudinal
ultrasonic wave and is consistent with BCS theory.Comment: 5 pages, 5 figures (fig.3 is colored), RevTeX4; the text is modifie
A high temperature apparatus for measurement of the Seebeck coefficient
A high temperature Seebeck coefficient measurement apparatus with various features to minimize typical sources of error is designed and built. Common sources of temperature and voltage measurement error are described and principles to overcome these are proposed. With these guiding principles, a high temperature Seebeck measurement apparatus with a uniaxial 4-point contact geometry is designed to operate from room temperature to over 1200 K. This instrument design is simple to operate, and suitable for bulk samples with a broad range of physical types and shapes
相対的副腎機能不全の児に対するコルチコトロピン放出ホルモン分泌刺激試験
京都大学新制・論文博士博士(医学)乙第13553号論医博第2282号新制||医||1067(附属図書館)京都大学大学院医学研究科医学専攻(主査)教授 齋藤 潤, 教授 万代 昌紀, 教授 長尾 美紀学位規則第4条第2項該当Doctor of Medical ScienceKyoto UniversityDFA
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