### 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

*Journal of the Physical Society of Japan*,

*75*(1), [014601]. https://doi.org/10.1143/JPSJ.75.014601

**Thermal transport properties of a charge density wave.** / Yoshimoto, Hiroyuki; Kurihara, Susumu.

Research output: Contribution to journal › Article

*Journal of the Physical Society of Japan*, vol. 75, no. 1, 014601. https://doi.org/10.1143/JPSJ.75.014601

}

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

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 -