Acoustic Polaron in Free-Standing Slabs  

作　　者：Junhua Hou Guangming Si 

机构地区：[1]College of Physics and Information Engineering, Shanxi Normal University, Linfen, China

出　　处：《World Journal of Condensed Matter Physics》2014年第4期235-240,共6页凝固态物理国际期刊（英文）

摘　　要：The ground-state energy and its derivate of the acoustic polaron in free-standing slab are calculated by using the Huybrechts-like variational approach. The criteria for presence of the selftrapping transition of the acoustic polaron in free-standing slabs are determined qualitatively. The critical coupling constant for the discontinuous transition from a quasi-free state to a trapped state of the acoustic polaron in free-standing slabs tends to shift toward the weaker electronphonon coupling with the increasing cutoff wave-vector. Detailed numerical results confirm that the self-trapping transition of holes is expected to occur in the free-standing slabs of wide-bandgap semi-conductors.The ground-state energy and its derivate of the acoustic polaron in free-standing slab are calculated by using the Huybrechts-like variational approach. The criteria for presence of the selftrapping transition of the acoustic polaron in free-standing slabs are determined qualitatively. The critical coupling constant for the discontinuous transition from a quasi-free state to a trapped state of the acoustic polaron in free-standing slabs tends to shift toward the weaker electronphonon coupling with the increasing cutoff wave-vector. Detailed numerical results confirm that the self-trapping transition of holes is expected to occur in the free-standing slabs of wide-bandgap semi-conductors.

关 键 词：FREE-STANDING SLABS ACOUSTIC POLARON SELF-TRAPPING 

分 类 号：R73[医药卫生—肿瘤]