Correlation Between Band Structure and Magneto- Transport Properties in n-type HgTe/CdTe Two- Dimensional Nanostructure Superlattice. Application to Far-Infrared Detection
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Electron-Transport and Cyclotron-Resonance in [211]-Oriented HgTe-CdTe Superlattices
We discuss a magneto transport and magneto-optical investigation of [211 ]-oriented HgTe-CdTe superlattices. Measurements were performed on seven n-type samples with well widths in the range 41-125 A and energy gaps between 0 and 128 meV. Both magnetotransport and magneto-optical results give evidence for an additional electron species besides the superlattice electrons and holes usually observ...
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The type III band alignment of HgTe/CdTe superlattices leads to the interesting possibility of achieving very long wavelength infrared (VLWIR) (15 μm and longer) cutoff wavelengths with either normal (HgTe layer thickness less than about 70 Å for CdTe layer thickness of 50 Å) or inverted (HgTe thickness greater than about 70 Å) band structures. The inverted band structure superlattices promise ...
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In this paper we consider a new superlattice system consisting of alternating layers of CdTe and HgTe constructed parallel to the (001) zincblende plane. The tight-binding method is used to calc~late the electronic properties of this system, in particular, band edge and interface properties. The energy gap as a function of layer thickness is determined. It is found to decrease monotonically wit...
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In two-dimensional topological insulators, such as inverted HgTe/CdTe quantum wells, helical quantum spin Hall (QSH) states persist even at finite magnetic fields below a critical magnetic field Bc, above which only quantum Hall (QH) states can be found. Using linear-response theory, we theoretically investigate the magnetooptical properties of inverted HgTe/CdTe quantum wells, both for infinit...
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تاریخ انتشار 2017