Quantum phonons and the Peierls transition temperature
學年 90
學期 1
出版(發表)日期 2002-01-01
作品名稱 Quantum phonons and the Peierls transition temperature
著者 Zheng, H.; Zhu, S. Y.; Chen, Wei- yeu
單位 淡江大學物理學系
出版者 College Park: American Physical Society
著錄名稱、卷期、頁數 Physical Review B (Condensed Matter and Materials Physics) 65(1), 014304(8 pages)
摘要 The effect of quantum phonons on the Peierls transition temperature in a one-dimensional commensurate system is studied. The nonadiabatic effect due to finite phonon frequency ωp>0 are treated through an energy-dependent electron-phonon scattering function δ(k′,k). By using the Green’s-function perturbation theory we have shown that our theory gives a good description of the effect of quantum phonons: (i) There exists a critical electron-phonon coupling gc2. The Peierls transition temperature Tp=0 when the coupling g2<gc2 and Tp increases with increasing g2>gc2. (ii) The ratio 2Δ/Tp could be much larger than the BCS value 3.527.
語言 en
ISSN 1098-0121
期刊性質 國外
收錄於 SCI
國別 USA
出版型式 紙本

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27790 )