HELIUM-ATOMS IN ZEOLITE CAGES - NOVEL MOTT-HUBBARD AND BOSE-HUBBARD SYSTEMS

被引:13
作者
CHEN, BY [1 ]
MAHANTI, SD [1 ]
YUSSOUFF, M [1 ]
机构
[1] MICHIGAN STATE UNIV,CTR FUNDAMENTAL MAT RES,E LANSING,MI 48824
关键词
D O I
10.1103/PhysRevLett.75.473
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Low-lying excitations of He-4 and He-3 atoms confined inside zeolite cages have been modeled by Bose-Hubbard and Mott-Hubbard rings with strong intrasite repulsion and finite intersite attraction. Differences between He-4 and He-3 arise due to mass and the statistics. Calculated temperature and concentration dependences of the heat capacity agree qualitatively with the experiment, but a quantitative comparison suggests that disorder may dominate at very low T.
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收藏
页码:473 / 476
页数:4
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