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ID 19276
file
creator
Harimochi, Hiroyuki
Ishizaka, Masahiro
Yamanishi, Masamichi
Matsuishi, Satoshi
Hosono, Hideo
abstract
We have performed terahertz time-domain spectroscopy of carrier-doped nanoporous crystal 12CaO·7Al2O3 showing the Mott variable range hopping at room temperature. The real part of the dielectric constant clearly demonstrates the nature of localized carriers. The frequency dependence of both the real and imaginary parts of the dielectric constant can be simply explained by assuming two contributions: a dielectric response by the parent compound with no carriers and an ac hopping conduction with the Jonscher law generally reported up to GHz range. The possible obedience to the Jonscher law in the THz range suggests a relaxation time of the hopping carriers much faster than 1 ps in the carrier-doped 12CaO·7Al2O3.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 70
issue
Issue 19
start page
193104-1
end page
193104-4
date of issued
2004-11-15
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter