Acoustic polaron in free-standing quantum wells

作者：Li J; Hou J H^*

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2015, 9(3-4): 447-450.

• Free-standing quantum well
• Acoustic polaron
• Self-trapping

The numerical results of the ground-state energy and the derivate of the acoustic polaron in free-standing quantum wells are performed by using the Huybrechts-like variational approach. The criterion for the self-trapping transition of the acoustic polaron in free-standing quantum wells is determined quantitatively. It is found that the critical coupling constant corresponding the discontinuous transition from a quasi-free state to a trapped state of the acoustic polaron in free-standing quantum wells tends to shift toward the weaker electron-phonon coupling with the increasing cutoff wave-vector. Detailed numerical results confirm that the self-trapping transition of acoustic polaron is expected to realize in the free-standing quantum wells of wide-band-gap semiconductors.

• 出版日期2015-4
• 单位山西师范大学