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881.
M. Ye Y. T. Cui Y. Nishimura Y. Yamada S. Qiao A. Kimura M. Nakatake H. Namatame M. Taniguchi 《The European Physical Journal B - Condensed Matter and Complex Systems》2010,75(1):31-35
The edge properties of single layer graphene epitaxially grown on partially graphitized 4H-SiC(0001) surface have been investigated with scanning tunneling microscopy (STM). We directly observed the atomic-structure dependency of the super structures in the vicinity of armchair and zigzag edges due to the different kinds of symmetry-breaking at those two edges. 相似文献
882.
By adopting a simplified model of a non-polytropic hard-sphere system where heat capacity depends on the temperature, we demonstrate the importance of non-polytropic effect on the shock-induced phase transitions. We show explicitly that with the increase of the shock strength the perturbed temperature (the temperature after a shock) increases and the vibrational modes are gradually excited, and as a result, shock-induced phase transitions are qualitatively and quantitatively different from the phase transitions observed in a simple polytropic model. The effect on the admissibility (stability) of a shock wave is also analyzed. 相似文献
883.
Computer Generated Rainbow Hologram 总被引:3,自引:0,他引:3
The rainbow hologram is very practical to display 3-D images because it can be reconstructed with white light. We propose a simplified model to calculate the computer generated rainbow hologram quickly. In the proposed method, we can simply generate the final hologram from intermediate data, whose total number of samples can be less than one tenth of the final hologram. This intermediate format makes fast computation and effective storage/transmission possible. Only multiple and additional operation need be used to convert the intermediate data to final data. Therefore, it is possible that hardware can be added to an electro-holographic display or printer. In this paper, we discuss both theory of the simplified model and experimental results of white light reconstructed images. Full color holograms are also discussed. 相似文献
884.
Bernard Mehlig Nobuhiko Taniguchi 《Physica E: Low-dimensional Systems and Nanostructures》1999,4(4):316
Fluctuations of expectation values of observables are calculated in complex quantum systems, such as disordered metallic grains or quantum systems with classical chaotic motion. We derive an exact expression for these fluctuations valid for systems with and without time-reversal symmetry, as well as in the transition region between these two cases. We compare our results with those of a semiclassical theory and with simulations of random matrices. 相似文献
885.
T. Yamauchi T. Taniguchi K. Oda T. Ikeda Y. Honda S. Tagawa 《Radiation measurements》1999,31(1-6):121-126
The effect of gamma-rays and pulsed electrons has been investigated on the bulk etch rate of CR-39 detector at doses up to 100 kGy under various dose-rate between 0.0044 and 35.0 Gy/s. The bulk etch rate increased exponentially with the dose at every examined dose-rates. It was reveled to be strongly depend on the dose-rate: the bulk etch rate was decreased with increasing dose-rate at the same total dose. A primitive model was proposed to explain the dose-rate effect in which oxygen dissolved was assumed to dominate the damage formation process. 相似文献
886.
J. Souletie Y. Tabata T. Taniguchi Y. Miyako 《The European Physical Journal B - Condensed Matter and Complex Systems》1999,8(1):43-46
The usual scaling equations at a phase transition, employed out of their usual validity range, with Tc a negative constant, fit properties observed in correlated electron systems with unmatched accuracy. We illustrate this behavior
with our data in Ce(Ru1-xRhx)2Si2 for x
= 0.4 and 0.5 and comment these results and what they imply physically.
Received 22 June 1998 and Received in final form 29 September 1998 相似文献
887.
Y. Toh S. Yamada A. Taniguchi Y. Kawase 《The European Physical Journal A - Hadrons and Nuclei》1999,4(3):233-238
The structure of 152Nd, produced via β− decay of 152Pr, has been investigated using γ-γ coincidence, γ-γ angular correlation, and β-γ-γ triple coincidence measurements. Praseodymium
activities were obtained by the thermal neutron fission of 235U and collected by the on-line isotope separator KUR-ISOL. Nineteen γ-rays and four excited states were newly found. The spins
of six exited states were determined and the parities of three of them were also deduced. The spin and parity of the 152Pr ground state, which were previously considered as 4−, are proposed to be 4+ by the present study.
Received: 19 October 1998 / Revised version: 22 December 1998 相似文献
888.
Masahiko Taniguchi Thies Thiemann Tsuyoshi Sawada Shuntaro Mataka 《无机化学与普通化学杂志》1999,625(8):1249-1251
The preparation of the layered [3.3]orthocyclophane tricarbonylchromium mono- and bis complexes, 4 and 5 , are described. X-ray crystallographic analysis reveals the fact that the distances and the dihedral angle between the planes of the two benzo rings in mono complex 4 decrease as compared to those in 1 . This is due to the decrease in π electron density in one benzo unit. 相似文献
889.
Nobukazu Taniguchi Takeshi Hata Motokazu Uemura 《Angewandte Chemie (International ed. in English)》1999,38(9):1232-1235
Without any formation of stereoisomers , the intramolecular pinacol cyclization of 1 —planar chiral mono-Cr(CO)3 complexes of 1,1′-biphenyls with carbonyl functionalities at the 2- and 2′-positions—with samarium diiodide gives cyclic trans-1,2-diols 2 . Upon exposure to sunlight, the chromium-complexed diols 2 produce optically pure chromium-free trans-diols 3 . Similarly, the corresponding enantiomerically pure trans-1,2-diamines and amino alcohols are obtained from the planar chiral chromium complexes of biphenyls with diimino or keto-imino functionalities. R1=H, OMe; R2=H, Me; R3=H, Me. 相似文献
890.