K. Suekuni
Hiroshima University
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Publication
Featured researches published by K. Suekuni.
Applied Physics Letters | 2008
Marcos A. Avila; K. Suekuni; Kazunori Umeo; Hiroshi Fukuoka; Shoji Yamanaka; Toshiro Takabatake
For the past decade, intermetallic clathrates have been rattling their way into mainstream research in thermoelectrics. The unusual vibrations of their guest ions inside oversized cages interfere with the cage phonons while leaving the electronic flow intact, providing an exotic way to achieve a best-of-both-worlds scenario in terms of electrical and thermal transport in the same material. Here, we present the structural and thermoelectric properties of Ba8Ga16Sn30 single crystals grown in the type-I clathrate structure (β-BGS), showing one of the lowest recorded thermal conductivities κ(T) for any bulk compound, while still behaving electronically as a heavily doped n-type semiconducting crystal.
Physical Review B | 2007
K. Suekuni; Marcos A. Avila; Kazunori Umeo; T. Takabatake
We present a systematic study of thermal conductivity, specific heat, electrical resistivity, thermopower, and x-ray diffraction measurements performed on single-crystalline samples of the pseudoquaternary type-I clathrate system
Journal of the Physical Society of Japan | 2005
Kazunori Umeo; Marcos A. Avila; Takeaki Sakata; K. Suekuni; Toshiro Takabatake
{\mathrm{Sr}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Si}}_{30\ensuremath{-}x}{\mathrm{Ge}}_{x}
Physical Review B | 2009
Tatsuya Mori; S. Goshima; Kei Iwamoto; S. Kushibiki; Hiroaki Matsumoto; N. Toyota; K. Suekuni; Marcos A. Avila; T. Takabatake; Takumi Hasegawa; N. Ogita; M. Udagawa
, in the full range of
Science and Technology of Advanced Materials | 2008
Jun Tang; Zhaofei Li; Jing Ju; Ryotaro Kumashiro; Marcos A. Avila; K. Suekuni; Toshiro Takabatake; Fangzhun Guo; Keisuke Kobayashi; K. Akai; Katsumi Tanigaki
0\ensuremath{\leqslant}x\ensuremath{\leqslant}30
Journal of Physics: Conference Series | 2007
Yuichi Takasu; Takumi Hasegawa; N. Ogita; M. Udagawa; K. Suekuni; Marcos A. Avila; T. Takabatake
. All the samples show metallic behavior with
international conference on thermoelectrics | 2007
K. Suekuni; Shuhei Yamamoto; Marcos A. Avila; T. Takabatake
n
international conference on thermoelectrics | 2007
Shota Narazu; Yuta Hadano; K. Suekuni; T. Takabatake; K. Suzuki; Hiroaki Anno
-type majority carriers. However, the thermal conductivity and specific heat strongly depend on
Physical Review B | 2008
K. Suekuni; Marcos A. Avila; Kazunori Umeo; Hiroshi Fukuoka; Syoji Yamanaka; T. Nakagawa; T. Takabatake
x
Physical Review B | 2010
K. Suekuni; Yuichi Takasu; Takumi Hasegawa; N. Ogita; M. Udagawa; Marcos A. Avila; T. Takabatake
. Upon increasing