Open AccessTemperature dependence of the Seebeck coefficient for mixed semiconducting and metallic single-wall carbon nanotube bundles
Author(s) -
Daisuke Hayashi,
Yusuke Nakai,
Haruka Kyakuno,
Yasumitsu Miyata,
Kazuhiro Yanagi,
Yutaka Maniwa
Publication year - 2019
Publication title -
applied physics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.911
H-Index - 94
eISSN - 1882-0786
pISSN - 1882-0778
DOI - 10.7567/1882-0786/ab547b
Subject(s) - carbon nanotube , materials science , seebeck coefficient , thermoelectric effect , metal , doping , condensed matter physics , nanotube , nanotechnology , composite material , thermodynamics , optoelectronics , thermal conductivity , metallurgy , physics
The temperature ( T ) dependence of the Seebeck coefficient ( S ) for single-wall carbon nanotube (SWCNT) bundles was systematically investigated as a function of the chemical potential ( μ ) through theoretical simulations employing non-equilibrium Green’s function theory. The bundles were modeled as laterally aligned parallel circuits of semiconducting and metallic SWCNTs. The T dependence of S varied substantially with μ and with metallic SWCNT content. The calculated results semi-quantitatively reproduced the typical behavior observed experimentally for SWCNT films with chemical doping reported previously.