Magnetoresistivity features connected with the spin level coincidences under tilted fields in a 螕conduction band of the HgTe quantum well were found to align along straight trajectories in a (B,B) plane between the field components perpendicular and parallel to the layer, meaning a linear spin ...
The mobility has been found to reach a maximum and then to decrease at two-dimensional electron densities above (2–6) × 10 11 cm 2 owing to scattering by roughness of the quantum well. The theory of scattering by roughness has been elaborated taking into account transformation of the ...
HgTe quantum wells (QWs) have shown a number of interesting phenomena, recently the first two-dimensional topological insulating state. We have studied the
Crossing of conduction- and valence-subband Landau levels in an inverted HgTe/CdTe quantum well In the inverted-band regime of HgTe/CdTe quantum wells, the lowest Landau level of the lowest conduction subband and the highest Landau level of the topmos... M Schultz,U Merkt,A Sonntag,... -...
Using k路p theory, we derive an effective four-band model describing the physics of the typical two-dimensional topological insulator (HgTe/CdTe quantum well (QW)) in the presence of an out-of-plane (in the z-direction) inversion breaking potential and an in-plane potential. We find that ...
Figure1.(a) Four-terminal device based on HgTe/CdTe quantum well with two current terminals 1, 4 and two voltage terminals 2, 3; the blue region and green region can be independently tuned into the three region shown in panel (b); (b) band structure of 2 D HgTe/CdTe quantum well. ...
This chapter will focus on the experimental properties of the quantum spin Hall effect in HgTe quantum well structures. HgTe quantum wells above a critical thickness are 2-dimensional topological insulators. The most prominent signature of the non-trivial topology in these systems is the occurrence ...
It is also found that the splitting of this anticrossing only depends weakly on the tilting angle when the magnetic field is tilted away from the perpendicular direction to the quantum well. Thus, the strength of bulk inversion asymmetry can be determined via a direct comparison between the ...
Transport experiments on HgTe/CdTe quantum wells are described that demonstrate the existence of the edge states predicted for the quantum spin Hall insulator... MZ Hasan - 《Rev.mod.phys》 被引量: 5644发表: 2010年 Coupled-channel version of the PT-symmetric square well A coupled pair of PT...
We present a theoretical study on the electron tunneling through a single barrier created in a two-dimensional electron gas (2DEG) and quantum spin Hall (QSH) bar in a HgTe/CdTe quantum well with inverted band structures. For the 2DEG, the transmission shows the Fabry-Pérot resonances for...