EFFECT OF SHORT-RANGE POTENTIAL AND COUPLING WITH PHONONS ON IMPURITY STATES

被引:3
作者
BEDNAREK, S
ADAMOWSKI, J
机构
[1] Faculty of Physics and Nuclear Techniques, Academy of Mining and Metallurgy (AGH)
关键词
D O I
10.1016/0038-1098(94)90779-X
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
An influence is discussed of a short-range potential and a coupling with phonons on the energy spectrum of donors. It is shown that the increasing attractive short-range potential leads to an additional state of s symmetry, in which the electron is more strongly localized than in the other states. The energy level connected with this state and hydrogen-like donor levels exhibit an anticrossing with a shape dependent on the electron-phonon interaction. For sufficiently small phonon energy, the anticrossing becomes very sharp. This additional state coexists with the hydrogen-like states, which can lead to a metastability of donors.
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页码:429 / 434
页数:6
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