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Structure and Electronic Properties of Silicon and Germanium Network Polyhedra

Published online by Cambridge University Press:  26 February 2011

Katsumi Tanigaki ,
Takeshi Rachi ,
Ryotaro Kumashiro ,
Takuya Nishino ,
Kiyotsugu Narita  and
Naoya Komatsu
Katsumi Tanigaki
Affiliation:
tanigaki@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan, +81-22-795-6469, +81-22-795-6470
Takeshi Rachi
Affiliation:
rachi@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan
Ryotaro Kumashiro
Affiliation:
rkuma@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan
Takuya Nishino
Affiliation:
nishino@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan
Kiyotsugu Narita
Affiliation:
narita@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan
Naoya Komatsu
Affiliation:
kamatsu@sspns.phys.tohoku.ac.jp, Tohoku University, Department of Physics, 6-3 Aoba, Aramaki, Aoba, Sendai, 980-8578, Japan
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Abstract

Clathrates of type I to type III are presented from the two points of views. The first one is intriguing electronic states appearing from the variation in phonons. The various phonons ranging from lattice phonons, intra-cluster phonons and atomic phonons are described in connection to the electronic states created via electron-phonon interactions. The other issue is the application to thermoelectric power materials on a basis of the concept of phonon-glass-electron-crystal (PGEC).

Keywords

nanostructurecluster assemblysuperconducting
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 988: Symposium QQ – Solid-State Chemistry of Inorganic Materials VI , 2006 , 0988-QQ07-05
Copyright
Copyright © Materials Research Society 2007

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