CAJ | 학술논문

采用分维变分方法讨论了有限深抛物量子阱中束缚极化子的束缚能,得到了束缚能随阱宽的变化关系,并给出了声子对束缚能的贡献随阱宽的变化曲线.数值计算的结果表明,束缚极化子的束缚能随阱宽的增大存在一极大值,电子一声子的相互作用使束缚极化子的束缚能显著降低,声子的贡献不可忽略.
채용분유변분방법토론료유한심포물양자정중속박겁화자적속박능,득도료속박능수정관적변화관계,병급출료성자대속박능적공헌수정관적변화곡선.수치계산적결과표명,속박겁화자적속박능수정관적증대존재일겁대치,전자일성자적상호작용사속박겁화자적속박능현저강저,성자적공헌불가홀략.
The binding energy of a bound polaron in a finite parabolic quantum well is studied theoretically by a fractional-dimensional variational method. The numerical results for the binding energies of the bound polaron and longitudinal-opti-cal phonon contributions in GaAs/Al0.3 Ga0.7 As parabolic quantum well structures are obtained as functions of the wellwidth. It is shown that the binding energies of the bound polaron are obviously reduced by the electron-phonon interactionand the phonon contribution is observable and cannot be neglected.