Anomalous influence of magnetic field on the indirect exciton in GaAs/AlGaAs double quantum wells

Krivolapchuk, V. V.; Mazurenko, D. A.; Moskalenko, E. S.; Полетаев, Н. К.; Zhmodikov, A. L.; Cheng, T.S.; Foxon, C. T.

doi:10.1134/1.1130435

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…It plays for the electron the role of a correlation quasihole. As was shown in (139) the CPs may exist in the form of plane waves and the many-particle wave functions also can be characterized by the wave vector k.…”

Section: Gauge Transformations and Statistical Gauge Fieldmentioning

confidence: 88%

“…In the case of electrons it is the Coulomb electronelectron interaction which is not canceled by the gauge transformation and CS gauge potential. It is named as "kinetic" because it depends on the wave vector of the operators (139). The bound objects such as CPs do, in fact, have such an effective "kinetic" energy.…”

Section: Gauge Transformations and Statistical Gauge Fieldmentioning

confidence: 99%

“…In these systems the polariton lifetime is longer than, but not much longer than the polariton-polariton scattering time, which leads to the thermalization. By contrast over past twenty years several groups of investigators represented by Snoke [111][112][113][114][115][116][117][118][119][120][121], Butov [122][123][124][125][126][127][128][129][130], Timofeev [131][132][133][134][135][136][137][138], Krivolapchuk [139][140][141][142][143], Fukuzawa [144][145][146] and their coworkers have pursued experiments in double quantum well (DQW) excitonic systems with very long lifetime. In these systems the indirect excitons (IXs) formed from spatially separated electrons and holes have dipole moments oriented perpendicularly to the layers.…”

Section: Spontaneous Coherence In 2d Excitonic Systemsmentioning

confidence: 99%

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Spontaneous Symmetry Breaking and Coherence in Two-Dimensional Electron–Hole and Exciton Systems

Moskalenko¹,

Liberman²,

Dumanov³

et al. 2012

Journal of Nanoelectronics and Optoelectronics

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The spontaneous breaking of the continuous symmetries of the two-dimensional (2D) electron-hole systems in a strong perpendicular magnetic field leads to the formation of new ground states and determines the energy spectra of the collective elementary excitations appearing over these ground states. In this review the main attention is given to the electron-hole systems forming coplanar magnetoexcitons in the Bose-Einstein condensation (BEC) ground state with the wave vector k = 0, taking into account the excited Landau levels, when the exciton-type elementary excitations coexist with the plasmon-type oscillations. At the same time properties of the two-dimensional electron gas (2DEG) spatially separated as in the case of double quantum wells (DQWs) from the 2D hole gas under conditions of the fractional quantum Hall effect (FQHE) are of great interest because they can influence the quantum states of the coplanar magnetoexcitons when the distance between the DQW layers diminishes. We also consider in this review the bilayer electron systems under conditions of the FQHE with the one half filling factor for each layer and with the total filling factor for two layers equal to unity because the coherence between the electron states in two layers is equivalent to the formation of the quantum Hall excitons (QHExs) in a coherent macroscopic state. This makes it possible to compare the energy spectrum of the collective elementary excitations of the Bose-Einstein condensed QHExs and coplanar magnetoexcitons. The breaking of the global gauge symmetry as well as of the continuous rotational symmetries leads to the formation of the gapless Nambu-Goldstone (NG) modes while the breaking of the local gauge symmetry gives rise to the Higgs phenomenon characterized by the gapped branches of the energy spectrum. These phenomena are equivalent to the emergence of massless and of massive particles, correspondingly, in the relativistic physics. The application of the Nielsen-Chadha theorem establishing the number of the NG modes depending of the number of the broken symmetry operators and the elucidation when the quasi-NG modes appear are demonstrated using as an example related with the BEC of spinor atoms in an optical trap. They have the final aim to better understand the results obtained in the case of the coplanar Bose-Einstein condensed magnetoexcitons. The Higgs phenomenon results in the emergence of the composite particles under the conditions of the FQHE. Their description in terms of the Ginzburg-Landau theory is remembered. The formation of the high density 2D magnetoexcitons and magnetoexciton-polaritons with point quantum vortices attached is suggested. The conditions in which the spontaneous coherence could appear in a system of indirect excitons in a double quantum well structures are discussed. The experimental attempts to achieve these conditions, the main results and the accumulated knowledge are reviewed.

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Section: Gauge Transformations and Statistical Gauge Fieldmentioning

confidence: 88%

Section: Gauge Transformations and Statistical Gauge Fieldmentioning

confidence: 99%

Section: Spontaneous Coherence In 2d Excitonic Systemsmentioning

confidence: 99%

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Spontaneous Symmetry Breaking and Coherence in Two-Dimensional Electron–Hole and Exciton Systems

Moskalenko¹,

Liberman²,

Dumanov³

et al. 2012

Journal of Nanoelectronics and Optoelectronics

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“…We applied our method to study the excitonic states in a GaAs Al .33 Ga .67 As DQW, for the specific case of a DQW composed of a left well of 10.18 nm, a barrier of 3.82 nm, and a right well of 9.61 nm. The effects of external electric and magnetic fields on the luminescence (PL) intensity for this heterostructure has been recently studied experimentally by Krivolapchuk et al [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Direct and indirect exciton mixing in a slightly asymmetric double quantum well

Vera

2000

J. Phys.: Condens. Matter

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We studied, theoretically, the optical absorption spectra for a slightly asymmetric double quantum well (DQW), in the presence of electric and magnetic fields. Recent experimental results for a 10.18/3.82/9.61 nm GaAs Al .33 Ga .67 As DQW show clearly the different behavior in the luminescence peaks for the indirect exciton IX and left direct exciton DX as a function of the external electric field. We show that the presence of a peak near the DX peak, attributed to an impurity bound left DX in the experimental results, could be a consequence of the non-trivial mixing between excitonic states.

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“…More recently, Krivolapchuk and co-workers 2 and Timofeev et al 3 also reported large, low-frequency f luctuations in the luminescence intensity from indirect excitons at high density in bias-coupled quantum wells. They varied the laser excitation density both with and without a magnetic field and found low-frequency f luctuations at high excitation density.…”

mentioning

confidence: 96%

Subhertz spectral fluctuations from high-density excitons in coupled quantum wells

et al. 2000

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In 1994 Butov et al. [Phys. Rev. Lett. 73, 304 (1994)] reported large, extremely low-frequency fluctuations in the luminescence intensity from indirect excitons in a coupled quantum well. We have reproduced these fluctuations in a similar structure. Our observations indicate, however, that the fluctuations are spectral fluctuations rather than intensity fluctuations. We have eliminated several possible causes for the fluctuations and propose a possible cause.

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Anomalous influence of magnetic field on the indirect exciton in GaAs/AlGaAs double quantum wells

Cited by 9 publications

References 8 publications

Spontaneous Symmetry Breaking and Coherence in Two-Dimensional Electron–Hole and Exciton Systems

Spontaneous Symmetry Breaking and Coherence in Two-Dimensional Electron–Hole and Exciton Systems

Direct and indirect exciton mixing in a slightly asymmetric double quantum well

Subhertz spectral fluctuations from high-density excitons in coupled quantum wells

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