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51.
S. Nagahara Y. Matsuura R. Naganuma T. Kita O. Wada L. Marsal H. Mariette 《Physica E: Low-dimensional Systems and Nanostructures》2004,21(2-4):345
We observed anisotropic large peak-energy shift of photoluminescence (PL) from CdTe/Cd0.75Mn0.25Te quantum wires (QWRs). The large PL-peak-energy shift is caused by the exchange interaction between excitons in the non-magnetic QWR and Mn ions in the DMS barrier. The exchange interaction is enhanced when magnetic field is perpendicular to the QWR. 相似文献
52.
It is known that every 3-dimensional noetherian Calabi–Yau algebra generated in degree 1 is isomorphic to a Jacobian algebra of a superpotential. Recently, S.P. Smith and the first author classified all superpotentials whose Jacobian algebras are 3-dimensional noetherian quadratic Calabi–Yau algebras. The main result of this paper is to classify all superpotentials whose Jacobian algebras are 3-dimensional noetherian cubic Calabi–Yau algebras. As an application, we show that if S is a 3-dimensional noetherian cubic Calabi–Yau algebra and σ is a graded algebra automorphism of S, then the homological determinant of σ can be calculated by the formula with one exception. 相似文献
53.
Izuru Mori 《代数通讯》2013,41(12):4659-4677
Let A be a Frobenius Koszul algebra such that its Koszul dual A ! is a quantum polynomial algebra. Co-point modules over A were defined as dual notion of point modules over A ! with respect to the Koszul duality. In this article, we will see that various important functors between module categories over A used in representation theory of finite dimensional algebras send co-point modules to co-point modules. As a consequence, we will show that if (E, σ) is a geometric pair associated to A !, then the map σ:E → E is an automorphism of the point scheme E of A !, so that there is a bijection between isomorphism classes of left point modules over A ! and those of right point modules over A !. 相似文献
54.
Hiroshi Uyama Hideharu Kurioka Junji Sugihara Izuru Komatsu Shiro Kobayashi 《Journal of polymer science. Part A, Polymer chemistry》1997,35(8):1453-1459
Enzymatic oxidative polymerization of p-alkylphenols using horseradish peroxidase as catalyst has been carried out in two polymerization solvent systems: a mixture of phosphate buffer (pH 7) and 1,4-dioxane, and a reverse micellar solution, yielding powdery polymeric materials. The polymer yield was much dependent upon the type of alkyl group in the monomer as well as the solvent type. In case of the polymerization of umbranched alkylphenols in the aqueous 1,4-dioxane, the polymer yield increased with increasing chain length of the alkyl group from 1 to 5, and the yield of the polymer from hexyl or heptylphenol was almost the same as that of the pentyl derivative. The relationship between the type of substituent and the polymer yield in the reverse micellar system was different from that in the aqueous 1,4-dioxane; the highest yield was achieved from ethylphenol. The resulting polymers had molecular weight of several thousands. The polymer was estimated to be composed from a mixture of phenylene and oxyphenylene units from IR analyses. TG measurement exhibited that the polymer had relatively high thermal stability. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 1453–1459, 1997 相似文献
55.
Fengniu Lu Akira Shinohara Izuru Kawamura Akinori Saeki Tomohisa Takaya Koichi Iwata Takashi Nakanishi 《Helvetica chimica acta》2023,106(8):e202300050
Achieving the lowest phase transition temperature with minimal chemical modification in highly crystalline π-conjugated molecules is a universal problem in related research fields. This paper reports room-temperature liquefication of diphenylpyrene isomers by introducing bulky yet flexible branched alkyl chains through molecular desymmetrization. Six isomers with different symmetries depending on the positions of the phenyl groups and alkyl groups were synthesized, and three of the isomers were found to be liquids at 25 °C, a state in which they have remained for more than five years. Although it is generally believed that the lower the symmetry of a molecule, the less likely it is to crystallize, one molecule with a relatively high molecular symmetry unexpectedly did not crystallize, which was evidenced by the kinetic inhomogeneity of this amorphous material (practically stable liquid) assessed by rheological analysis. 相似文献
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59.
Izuru Kimura 《Journal of magnetism and magnetic materials》1987,70(1-3):273-274
Using the 12-sublattice model with Ising spin
, we analyze the magnetization process of DyCu2 theoretically. The necessary conditions for the exchange constants and the possible magnetic structures of DyCu2 are suggested. 相似文献
60.
A random site Ising model on the checkerboard square lattice with first neighbor interactionsJ
in all first neighbor bonds and second neighbor interactionsJ
in red squares is considered as a simple model of the dilute spin glass of Eu
p
Sr1–p
S. The phase boundary between the paramagnetic and ferromagnetic phases, and that between the paramagnetic and spin glass phases are calculated. The obtained phase diagram is qualitatively similar to the experimental result by Maletta and Convert. 相似文献