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Monte Carlo Simulation of Interacting Liquid Crystal and Substrate using Rigid Model Molecules
Hyodo, Yosuke,Koda, Tomonori,Momoi, Yuichi,Kim, Woo-Yeol,Nishioka, Akihiro,Miyata, Ken,Murasawa, Go The Korean Infomation Display Society 2007 Journal of information display Vol.8 No.4
In the present study, we propose Monte Carlo simulation that takes into consideration the interface phenomena between liquid crystal and substrate. We use rigid model molecules of liquid crystal and substrate. Interface is generated using potential field that induces decomposition of molecules. We use hard spherocylinders as model liquid crystal molecules. Substrate is modeled as region composed of shorter spherocylinders. Our results show that there is a case in which nematic order is reinforced in the vicinity of rubbed substrate.
Strongly correlated electrons on frustrated lattices
Tsunetsugu, H,Hattori, K,Ohashi, T,Kawakami, N,Momoi, T Institute of Physics 2009 Journal of physics. Conference series Vol.145 No.1
<P>We review our two recent theoretical works on strongly correlated electrons on typical frustrated lattices. The first topic is about a Mott transition in the single-band Hubbard model on anisotropic triangular lattice, and we discuss a reentrant behaviour of metal-insulator transition, consistent with that in a κ-type BEDT-TTF salt. The second topic is about heavy fermion behaviour in the vanadium spinel LiV<SUB>2</SUB>O<SUB>4</SUB>. We study the 3-orbital t<SUB>2<I>g</I></SUB> Hubbard model on the pyrochlore lattice at quarter filling and derive its low-energy effective model. The correlations of spin and orbital degrees of freedom are discussed.</P>