Studies of Polaron Motion
Studies of Polaron Motion
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极化子运动的研究
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通讯作者：
T. Holstein
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作者：
T. Holstein
距离和总的非对角跃迁概率，因此是温度的指数上升函数。研究了电子重叠项的大小的极限J_（？），超过这个极限，本文的微扰处理就不适用了。对于进入理论的参数的代表性值，对于（a）基态极化子带的宽度和（B）高温位点跳跃概率的极端情况，J_n =-0.12 eV和0.035 eV（这些数字分别对应于0.24 eV和0.07 eV的电子带宽）。对于超过这些极限的电子带宽，需要根据绝热方法进行处理，文中给出了上述两种情况的初步结果。
distance and the total non-diagonal transition probability, and is therefore an exponentially rising function of temperature. The limit, J,,, , of the magnitude of the electronic overlap term, beyond which the perturbation treatment of the present paper becomes inapplicable, is investigated. For representative values of the parameters entering into the theory, J,,, - 0.12 ev and 0.035 ev for the extreme cases of (a) width of the ground-state polaron-band and (b) high-temperature site-jump probabilities (these numbers correspond to electronic bandwidths of 0.24 ev and 0.07 ev, respectively). For electronic bandwidths in excess of these limits, a treatment based on the adiabatic approach is required; preliminary results of such a treat-ment are given for the above two cases.