Abstract
The effects of collective modes on the thermoelectric properties of a charge density system is studied. We derive the temperature dependences of thermoelectric power and thermal conductivity by applying the linear response theory to the Fröhlich Hamiltonian. Energy dissipation has been attributed to the nonlinear interaction between the phase mode and the amplitude mode, ignoring disorder effects. We have found that the temperature dependence of the correlation function between electrical and heat currents is the same as that of the correlation function between electrical currents. This implies that thermoelectric power is inversely proportional to temperature. We have also found that the temperature dependences of all correlation functions are essentially determined by the same mechanism - nonlinear amplitude-phase interaction. The thermal conductivity is nearly constant at a temperature above the amplitude mode gap, and is exponentially low at a temperature sufficiently below it.
| Original language | English |
|---|---|
| Article number | 014601 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 75 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2006 Jan |
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Keywords
- Charge density wave
- Collective mode
- Thermoelectric properties
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Thermal transport properties of a charge density wave. / Yoshimoto, Hiroyuki; Kurihara, Susumu.
In: Journal of the Physical Society of Japan, Vol. 75, No. 1, 014601, 01.2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermal transport properties of a charge density wave
AU - Yoshimoto, Hiroyuki
AU - Kurihara, Susumu
PY - 2006/1
Y1 - 2006/1
N2 - The effects of collective modes on the thermoelectric properties of a charge density system is studied. We derive the temperature dependences of thermoelectric power and thermal conductivity by applying the linear response theory to the Fröhlich Hamiltonian. Energy dissipation has been attributed to the nonlinear interaction between the phase mode and the amplitude mode, ignoring disorder effects. We have found that the temperature dependence of the correlation function between electrical and heat currents is the same as that of the correlation function between electrical currents. This implies that thermoelectric power is inversely proportional to temperature. We have also found that the temperature dependences of all correlation functions are essentially determined by the same mechanism - nonlinear amplitude-phase interaction. The thermal conductivity is nearly constant at a temperature above the amplitude mode gap, and is exponentially low at a temperature sufficiently below it.
AB - The effects of collective modes on the thermoelectric properties of a charge density system is studied. We derive the temperature dependences of thermoelectric power and thermal conductivity by applying the linear response theory to the Fröhlich Hamiltonian. Energy dissipation has been attributed to the nonlinear interaction between the phase mode and the amplitude mode, ignoring disorder effects. We have found that the temperature dependence of the correlation function between electrical and heat currents is the same as that of the correlation function between electrical currents. This implies that thermoelectric power is inversely proportional to temperature. We have also found that the temperature dependences of all correlation functions are essentially determined by the same mechanism - nonlinear amplitude-phase interaction. The thermal conductivity is nearly constant at a temperature above the amplitude mode gap, and is exponentially low at a temperature sufficiently below it.
KW - Charge density wave
KW - Collective mode
KW - Thermoelectric properties
UR - http://www.scopus.com/inward/record.url?scp=30344478574&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=30344478574&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.75.014601
DO - 10.1143/JPSJ.75.014601
M3 - Article
AN - SCOPUS:30344478574
VL - 75
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 1
M1 - 014601
ER -