Optically detected heavy- and light-hole anti-crossing in GaAs quantum wells under pulsed magnetic fields

Yongmin Kim; Lee, Kyu-Seok; Perry, C. H.
February 2004
Applied Physics Letters;2/2/2004, Vol. 84 Issue 5, p738
Academic Journal
We report magneto-photoluminescence studies of two undoped GaAs–Al[sub 0.3]Ga[sub 0.7]As single quantum well (SQW) samples (120 and 60 Å) in pulsed magnetic fields up to ∼65 T. Both samples exhibit exciton transitions due to the ground-state (1s) electron-heavy-hole recombination which undergoes diamagnetic energy shifts at low fields and has a liner dependence at high fields. The 120 Å SQW shows the electron-light-hole exciton transition at zero magnetic field. However at about 30 T, the electron-heavy-hole and the electron-light-hole transitions intersect and show an anti-crossing behavior. The 60 Å SQW shows a similar behavior but the splitting between the heavy- and light-hole excitons can only be observed in the anti-crossing region at about 35 T. The results indicate that the valence band mixing plays a significant role at high magnetic fields. © 2004 American Institute of Physics.


Related Articles

  • Diamagnetic shift of the A free exciton in CuGaSe2 single crystals. Luckert, F.; Yakushev, M. V.; Faugeras, C.; Karotki, A. V.; Mudryi, A. V.; Martin, R. W. // Applied Physics Letters;10/18/2010, Vol. 97 Issue 16, p162101 

    Single crystals of CuGaSe2 were studied using magnetophotoluminescence in magnetic fields up to 20 T at 4.2 K. The rate of the diamagnetic shift in the A free exciton peak was determined to be 9.82×10-6 eV/T2. This rate was used to calculate the reduced mass as 0.115m0, the binding energy as...

  • Hydrostatic pressure effects on electron states in GaAs–(Ga,Al)As double quantum rings. Culchac, F. J.; Porras-Montenegro, N.; Latgé, A. // Journal of Applied Physics;May2009, Vol. 105 Issue 9, p094324-1 

    Here we address a theoretical analysis of the effects of applied hydrostatic pressure on electron states in concentric GaAs–(Ga,Al)As double quantum rings, under axial magnetic fields. Emphasis is put on the dependence of such effects on the system geometry confinement described within a...

  • Magnetic-field modulated exciton-exciton interaction in semiconductor microcavities. Zhang, Yongyou; Shi, Li-jie; Jin, Guojun; Zou, Bingsuo // Journal of Applied Physics;Mar2010, Vol. 107 Issue 5, p053527-1 

    We study the quantum-well magnetoexcitons by the variational method in the strong coupling regime of excitons with microcavity photons. In such strong coupling regime, we find that the coupling between the exciton internal state and center of mass motion can be neglected. Through the...

  • Magnetic exciton in a two-layer system. Vol, E. D.; Vol, E.D.; Shevchenko, S. I.; Shevchenko, S.I. // Low Temperature Physics;Aug2000, Vol. 26 Issue 8 

    Analyzes the bound state of a light electron of mass and a heavy hole of mass for two-layer semiconductor systems in a magnetic field. Ground-state energy of magnetic exciton; Behavior of exciton in crossed electric and magnetic fields.

  • Aperture effects on charged particles in a magnetic field. Wang, E. Y.; Li, W. Q.; Lam, S. W.; Hershkowitz, N. // Journal of Applied Physics;9/1/1991, Vol. 70 Issue 5, p2570 

    Presents information on a study which investigated aperture effects on charged particles in the presence of a magnetic field. Methods; Results; Discussion.

  • Direct imaging of the spatial diffusion of excitons in single semiconductor nanowires. Fickenscher, M. A.; Jackson, H. E.; Smith, L. M.; Yarrison-Rice, J. M.; Kang, J. H.; Paiman, S.; Gao, Q.; Tan, H. H.; Jagadish, C. // Applied Physics Letters;12/26/2011, Vol. 99 Issue 26, p263110 

    We use spatially and temporally resolved photoluminescence to measure exciton diffusion in single zinc blende GaAs/AlGaAs core/shell and mixed phase InP nanowires. Excitons in the single phase GaAs/AlGaAs nanowires are seen to diffuse rapidly throughout the nanowire with a measured diffusion...

  • Nondestructive photoacoustic detection of exciton resonances in GaAs/AlGaAs multiple quantum.... Chu, J.H.; Bak, Y.H.; Kim, J.H.; Park, H.L.; Park, S.H.; Kim, U.; Choi, J.G.; Kim, I.G. // Applied Physics Letters;2/7/1994, Vol. 64 Issue 6, p745 

    Examines the detection of hole excitons in GaAs/AlGaAs multiple quantum wells (MQW). Observation of distinct peaks in the photoacoustic signal of MQW: Exhibition of enhanced exciton binding energy in MQW structures.

  • On vortex phase of systems with pairing of spatially separated electrons and holes. Shevchenko, S.I.; Bezuglyi, V.A. // Low Temperature Physics;May99, Vol. 25 Issue 5, p366 

    Studies a structure formed by planar vortices in a disk-shaped sample in a magnetic fields whose two-dimensional divergence differs from zero. Determination of the total number of vortices and the energy of a system of vortices as functions of the external magnetic field and the sample size;...

  • Resonant tunneling of holes in double-barrier structures in the presence of an in-plane magnetic field. Zhu, Jian-Xin; Wang, Z. D.; Gong, Chang-De // Journal of Applied Physics;8/15/1996, Vol. 80 Issue 4, p2291 

    Discusses a study which investigated the resonant tunneling of holes in double-barrier semiconductor structures in the presence of an in-plane magnetic field. Theoretical background; Description of the experimental setup; Findings.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics