| Автор | S S Kubakaddi |
| Автор | P N Butcher |
| Дата выпуска | 1989-06-26 |
| dc.description | The theory of phonon-drag thermopower S<sub>g</sub> is given for a quasi-1D electron gas in a GaAs heterostructure. The coupling of the electrons to 3D phonons is considered through acoustic deformation potential and piezoelectric fields. An expression for S<sub>g</sub> is given which may be used for quasi-1D wires of different geometries. Numerical results are presented for both the screened and the unscreened value of S<sub>g</sub> for cylindrical wires in the temperature range 1-10 K. For temperatures T>or=2 K the major contribution to S<sub>g</sub> comes from the deformation potential scattering but for T<2 K the contribution to S<sub>g</sub> due to piezoelectric scattering is significant. Screening reduces S<sub>g</sub> by 40%. S<sub>g</sub> increases as the density of electrons decreases and curves of S<sub>g</sub>/T<sup>3</sup> against T show maxima. The overall behaviour is dominated by the 3D character of the phonon system and is similar to that found previously for a quasi-2D electron gas coupled to 3D phonons. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A calculation of the phonon-drag thermopower of a 1D electron gas |
| Тип | paper |
| DOI | 10.1088/0953-8984/1/25/006 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 1 |
| Первая страница | 3939 |
| Последняя страница | 3946 |
| Аффилиация | S S Kubakaddi; Dept., of Phys., Warwick Univ., Coventry, UK |
| Аффилиация | P N Butcher; Dept., of Phys., Warwick Univ., Coventry, UK |
| Выпуск | 25 |
