Magnetooptics of HgTe/CdTe Quantum Wells with Giant Rashba Splitting in Magnetic Fields up to 34 T

Rashba Spin Splitting in HgCdTe Quantum Wells with Inverted and Normal Band Structures

“…Our QWs are grown by molecular beam epitaxy on GaAs (013) substrates [ 25 , 26 , 27 , 28 , 29 ]. The QWs are asymmetrically modulation doped with In in bottom barriers (on the substrate side), with a concentration n imp = 1.8 × 10 18 cm −3 .…”

“… The calculations of the band structure for heterostructures close to those studied here both in composition and in the width of quantum wells were performed in [ 25 ] within the framework of the 8-band Kane model taking into account BIA and IIA. Structural asymmetry, due primarily to asymmetric doping, was taken into account in the Hartree approximation.…”

“…Structural asymmetry, due primarily to asymmetric doping, was taken into account in the Hartree approximation. The calculation showed the inverted type of band structure in QW, the lower subband in the conduction band is formed mainly by the states of heavy holes Γ8, in contrast to QW, which has a normal band order and the lower subband in the conduction band E1 of it is formed mainly by the electron-like states Γ6 (see Figure 1 and insets on it in [ 25 ]).…”

“…The calculation [ 25 ] predicts a significant Rashba spin splitting in the lower subband of the conduction band. Taking into account the BIA and IIA effects gives an additional correction to this value, and the contributions of these effects are significantly different in subbands of different nature.…”

“…In Reference [ 25 ], the spectra of the cyclotron resonance in the classical and quantizing magnetic fields in asymmetric HgCdTe/CdHgTe heterostructures with selective doping in barriers were investigated. Self-consistent calculations of energy spectra (at B = 0) and Landau levels in a standard 8-band Kane model in Hartree approximation were performed.…”