TITLE

Magnetic-field-induced localization of electrons in InGaN/GaN multiple quantum wells

AUTHOR(S)
Arnaudov, B.; Paskova, T.; Valassiades, O.; Paskov, P.P.; Evtimova, S.; Monemar, B.; Heuken, M.
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2590
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We study longitudinal electron transport in InGaN/GaN multiple quantum wells (MQWs) at moderate magnetic fields. We observe a stepwise behavior of both the Hall coefficient and magnetoresistivity. The peculiarities are explained by a magnetic-field-induced localization of electrons in a two-dimensional (2D) potential relief of the InGaN MQW due to composition fluctuations. We extend the model for a magnetic localization of electrons, treating every QW like a quasi-2D system with a cylindrical potential relief. The calculated values of the decrease of the sheet electron concentrations in a magnetic field based on such an assumption for 2D density of states in a InGaN MQW system are in good accordance with the experimentally obtained values. © 2003 American Institute of Physics.
ACCESSION #
10894459

 

Related Articles

  • Magnetically tunable diluted magnetic semiconductor (Cd, Mn)Te quantum well laser. Isaacs, E. D.; Heiman, D.; Zayhowski, J. J.; Bicknell, R. N.; Schetzina, J. F. // Applied Physics Letters;1/27/1986, Vol. 48 Issue 4, p275 

    We report the first observation of strong magnetic field tuning of laser emission from Cd1-xMnxTe/Cd1-yMnyTe multiple quantum well structures. The spectral peak of the stimulated emission shifts to lower energy with increasing field at a rate of 3.4 meV/T to a maximum shift of 34 meV at 10 T....

  • Conductance anomaly in a quantum well. Kim, Chang Sub; Olendski, Oleg // Applied Physics Letters;10/21/1996, Vol. 69 Issue 17, p2575 

    A single quantum well under the influence of vertical electric and in-plane magnetic fields is considered theoretically. Within an effective mass and independent-electron approximation, the spectroscopy of energy levels and the lateral currents are obtained. We found an interesting anomaly in...

  • Spin relaxation of Mn ions in (CdMn)Te/(CdMg)Te quantum wells under picosecond optical pumping. Tyazhlov, M. G.; Filin, A. I.; Larionov, A. V.; Kulakovskiı, V. D.; Yakovlev, D. R.; Waag, A.; Landwehr, G. // Journal of Experimental & Theoretical Physics;Oct97, Vol. 85 Issue 4, p784 

    Spin relaxation of Mn ions in a Cd[sub 0.97]Mn[sub 0.03]Te/Cd[sub 0.75]Mg[sub 0.25]Te quantum well with photogenerated quasi-two-dimensional electron-hole plasma at liquid helium temperatures in an external magnetic field has been investigated. Heating of Mn ions by photogenerated carriers due...

  • Lifetimes of magnetopositronium in semiconductor quantum wells. Prokop’ev, E. P. // Technical Physics Letters;Jun98, Vol. 24 Issue 6, p492 

    The lifetimes of magnetopositronium in a semiconductor quantum well in a high magnetic field are calculated in an exciton model.

  • Suppression of the coherent charge oscillations in coupled quantum wells by an in-plane magnetic field. Raichev, O. E. // Journal of Applied Physics;7/15/1996, Vol. 80 Issue 2, p924 

    Focuses on a study which investigated suppression of the coherent charge oscillations in coupled quantum wells by an in-plane magnetic field. Approximations and basic formalism for description of the coherent charge oscillations; Results and discussion;Conclusions.

  • Magnetic-field-induced hybridization of electron subbands in a coupled double quantum well. Dolgopolov, V. T.; Tsydynzhapov, G. E.; Shashkin, A. A.; Deviatov, E. V.; Hastreiter, F.; Hartung, M.; Wixforth, A.; Campman, K. L.; Gossard, A. C. // JETP Letters;4/25/98, Vol. 67 Issue 8, p595 

    We employ a magnetocapacitance technique to study the spectrum of the soft two-subband (or double-layer) electron system in a parabolic quantum well with a narrow tunnel barrier at the center. In this system, when unbalanced by gate depletion, two sets of quantum oscillations are observed at...

  • Kinetics of indirect photoluminescence in GaAs/Al[sub x]Ga[sub 1-x]As double quantum wells in a random potential with a large amplitude. Butov, L. V.; Mintsev, A. V.; Filin, A. I.; Eberl, K. // Journal of Experimental & Theoretical Physics;May99, Vol. 88 Issue 5, p1036 

    The kinetics of indirect photoluminescence of GaAs/Al[sub x]Ga[sub 1 - x]As double quantum wells, characterized by a random potential with a large amplitude (the linewidth of the indirect photoluminescence is comparable to the binding energy of an indirect exciton) in magnetic fields B≤12...

  • Energy levels of single and coupled quantum wells embedded in cylindrical buffer barriers affected by an axial magnetic field. Ping, Er-Xuan; Dalal, Vikram // Journal of Applied Physics;8/15/1994, Vol. 76 Issue 4, p2547 

    Presents a study that examined energy levels of an electron in single and coupled quantum wells (CQW) embedded in cylindrical buffer barriers under the influence of an axial magnetic field. Result of the discovery of quantum well structures in the 1970s; Observations on the CQW; Advantage of...

  • Time-resolved photoluminescence study of InGaAs/GaAs quantum wells on (111)B GaAs substrates under magnetic fields. Tsai, F. Y.; Lee, C. P.; Voskoboynikov, O.; Cheng, H. H.; Shen, Jinxi; Oka, Yasuo // Journal of Applied Physics;6/15/2001, Vol. 89 Issue 12, p7875 

    The exciton dynamics in In[sub x]Ga[sub 1-x]As/GaAs quantum wells grown on (111)B and (100) GaAs substrates were studied by time-resolved photoluminescence (PL) under magnetic fields in a Faraday configuration. We have found that the piezoelectric fields in (111)B samples affect the transient...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics