High-field splitting of the cyclotron resonance absorption in strainedp-InGaAs/GaAsquantum wells

Abstract

We report a systematic study of the cyclotron resonance ͑CR͒ absorption of two-dimensional holes in strained InGaAs/GaAs quantum wells ͑QWs͒ in the quantum limit. The energies of the CR transitions are traced as a function of magnetic field up to 55 T. A remarkable CR line splitting was evidenced when the resonant field exceeds 20 T. We analyze our data with a 4 ϫ 4 Luttinger Hamiltonian including strain and QW potentials using two different methods to calculate Luttinger parameters for ternary alloys. We found excellent agreement with the experiment when linear interpolation of the Luttinger parameters is used.

Charge inhomogeneities and transport in semiconductor heterostructures with a manganese $δ$-layer

“…The cyclotron resonance measurements were performed at the Toulouse High Magnetic Field Laboratory (LNCMP) using a long-pulse coil, delivering magnetic fields up to 40 T with a total pulse length of 800 ms. The obtained values of the hole effective mass m * ≃ 0.14m e are in agreement with m * determined in nonmagnetic GaAs/InGaAs/GaAs heterostructures from the ShdH oscillations 30 as well as from the recent cyclotron resonance measurements 32 .…”

Modification to the central-cell correction of germanium acceptors

“…11 and was recently successfully applied for a number of cyclotron-resonance experiments. [12][13][14][15][16] Figure 1(a) shows an example of the magnetic field dependence of the photocurrent under FEL excitation at λ = 46 μm. The inset shows the same data plotted versus reciprocal magnetic field.…”

Terahertz-range free-electron laser electron spin resonance spectroscopy: Techniques and applications in high magnetic fields

“…The new approach is of particular importance for studying magnetic excitation spectra in spin systems with large zero-field splitting (for instance single-molecular magnets, magnetically ordered materials, and gapped quantum-disordered antiferromagnets) and magnetic materials exhibiting field-induced phenomena (such as spinreorientation transitions, quantum critical behavior, etc.). The cyclotron resonance will probably remain one of the most important applications of the pulsed-field FEL-spectroscopy in the THz range [33]. The employment of FEL for pulse ESR (sometime called spin-echo ESR) looks very promising.…”

“…9. The data were obtained at a wavelength of 228.6 µm and at a Furthermore, the FEL facilities at the FZD have been further successfully used for studies of the cyclotron resonance in strained p-InGaAs/GaAs quantum wells in the frequency range of 2.6 -4.3 THz (69.9 -115.8 µm) in magnetic fields up to 55 T [33] and of the antiferromagnetic resonance in the hexagonal multiferroics YMnO 3 [34].…”