| Original Articles |
|
|
|
|
Self-Trapping of Acoustic Polaron in One Dimension |
| HOU Jun-Hua;LIANG Xi-Xia |
| Department of Physics, Inner Mongolia University, Hohhot 010021 |
|
| Cite this article: |
|
HOU Jun-Hua, LIANG Xi-Xia 2007 Chin. Phys. Lett. 24 3222-3224 |
|
|
|
Abstract The ground-state energy and effective mass of an acoustic polaron in one
dimension are calculated by using an electron--longitudinal-acoustic-phonon interaction Hamiltonian derived here. The self-trapping of the acoustic polaron is discussed. It is found that the critical coupling constant shifts toward weaker electron--phonon interaction with the increasing cutoff wave vector and the products of the critical coupling constant by the cutoff wave vector
tend to a certain value. The self-trapping of acoustic polarons in one
dimension is easier to be realized than that in three- and two-dimensional systems. The self-trapping transition of acoustic polarons is expected to be observed in the one dimensional systems of alkali halides and wide-band-gap semiconductors.
|
| Keywords:
71.38.Fp
73.20.Mf
63.20.Kr
|
|
|
Received: 02 June 2007
Published: 23 October 2007
|
|
| PACS: |
71.38.Fp
|
(Large or Fr?hlich polarons)
|
| |
73.20.Mf
|
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
|
| |
63.20.Kr
|
|
|
|
|
|
|
[1] Khan M A and Shur M S et al 1995 Appl. Phys. Lett. 66 1083
[2] Bungaro C, Rapcewicz K and Bernholc J 2000 Phys. Rev. B 61 6720
[3] Ruf T and Serrano J et al 2001 Phys. Rev. Lett. 86 906
[4] Yu H B, Chen H, Li D S and Zhou J M 2004 Chin. Phys.Lett. 21 1323
[5] Lu Y W, Cai L and Liang S 2006 Chin. Phys. Lett. 23 956
[6] Hayes W and Jenkin T J L 1986 J. Phys. C: SolidState Phys 19 6211
[7] Iwanaga M and Shirai M et al 2002 Phys. Rev. B 66064304
[8] Sumi A and Toyozawa Y 1973 J. Phys. Soc. Jpn. 35 137
[9] Peeters F M and Devreese J T 1985 Phys. Rev. B 323515
[10] Farias G A, da Costa W B and Peeters F M 1996 Phys.Rev. B 54 12835
[11] Wellein G and Fehske H 1998 Phys. Rev. B 58 6208
[12] Ryzhii V and Vyurkov V 2003 Phys. Rev. B 68165406
[13] Kirova N and Bussac M N 2003 Phys. Rev. B 68235312
[14] Hou J H and Liang X X 2007 Chin. Phys. 16 3059
[15] Huybrechts W J 1977 J. Phys C: Solid State Phys 10 3761
[16] Sarma S D and Mason B A 1985 Ann. Phys. 163 78
[17] Peeters F M, Wu X G and Devreese J T 1986 Phys. Rev. B 33 3926
[18] Liang X X and Hou J H 2004 Phys. Status Solidi C 1 2803 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
