The polarizability of electrons in CdTe/Cd_xHg_1−xTe/CdTe quantum wells is studied. It is shown that polarizability in the quantum well without cadmium is negative, i.e., the displacement of an electron and hole in the main subbands of spatial quantization in an electric field applied perpendicularly to the quantum well plane is opposite to the force acting on it. It is predicted that the negative polarizability can reduce the dielectric constant of quantum wells by up to 15% and manifest itself as the blue shift of the interband light absorption edge in an electric field.

中文翻译：

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HgTe量子阱的异常电子极化率

研究了CdTe / Cd _x Hg _{1- x} Te / CdTe量子阱中电子的极化率。结果表明，没有镉的量子阱中的极化率是负的，即，在垂直于量子阱平面施加的电场中，空间量化的主要子带中电子和空穴的位移与作用在其上的力相反。据预测，负极化率可将量子阱的介电常数降低多达15％，并表现为电场中带间光吸收边缘的蓝移。