Cyclotron Resonance Spectrum of 2D Polarons

Peeters, F. M.; Wu, Xiaofeng; Devreese, Jozef T.

doi:10.1088/0031-8949/1986/t13/046

Cited by 20 publications

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References 43 publications

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“…Estimating an effective coupling strength for the homopolar mode is difficult, due both the comparative weakness of the coupling and the lack of any theoretical description for the resonant interaction. One method for estimating g2 is via the self-energy correction, A E , which we expect to disappear above the phonon frequency [4,6]. Figure 3 demonstrates this effect clearly, with a step of around 2 cm-' at the HO phonon frequency on a plot of the resonance energy against magnetic field.…”

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confidence: 90%

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Howell¹,

Nicholas²,

Langerak³

et al. 1989

J. Phys.: Condens. Matter

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We have studied cyclotron resonance of the two-dimensional electron gas (2DEG) found in the layered semiconductor InSe at magnetic fields up to 30 T. The results show the first direct observation of resonant polaron coupling to a homopolar optic phonon, coupling via a deformation potential. We have also observed a large increase in the cyclotron effective mass as the LO phonon energy is approached, indicating the strongest polaron effects yet seen in any 2D system (a = 0.3).

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confidence: 90%

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Howell¹,

Nicholas²,

Langerak³

et al. 1989

J. Phys.: Condens. Matter

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Influence of Many‐Body Effects on the Cyclotron Resonance Mass of Two‐Dimensional Polarons with Application to GaAsAl_1−xGa_xAs Heterostructures

Peeters

Devreese

1987

Physica Status Solidi (b)

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The influence of many-body cffects on the cyclotron resonance mass of two-dimensional polarons is investigated. Firstly, the occupation effect is considered, which arises from the Fermi-Dirac statistics. In the calculation the Landau levels are considered to be perfectly sharp. It is found that (1) thc occupation effect reduces the polaron effect, i.e. the cyclotron resonance mass renormalization due to the polaron effect is reduced over the whole magnetic field region, (2) for a fixed electron density the cyclotron resonance mass shows an oscillating behaviour as a function of the magnetic field. The polaron cyclotron resonance mass attains minimal values when the filling factor passes through integer values. Secondly, the effect of static screening on the polaron cyclotron resonance mass is examined. The electron screening is found to reduce further the cyclotron resonance mass renormalization. The effect of the finite width of the two-dimensional electron layer is included into the present calculations by considering the lowest subband. After taking into account the nonparabolicity of the electron energy band, the calculated cyclotron resonance mass is compared to the recent experimental data for GaAs-A11 -,Ga,As heterostructures. Good agreement is found in the high magnetic field region, i.e. for magnetic fields H > 12 T.Der EinfluB von Vielkorpereffekten auf die Zyklotronresonanzmasse von zweidimensionalen Polaronen wird untersucht. Zuerst wird der Besetzungseffekt betrachtet, der aus der Fermi-DiracStatistik stammt. Bei der Berechnung werden die Landauniveaus als perfekt scharf agenommen. Es wird gefunden, da13 (1) der Besetzungseffekt sich auf den Polaroneneffekt reduziert, d. h. die Renormierung der Zyklotronresonanzmasse infolge des Polaroneneffekts wird uber den gesamten Magnetfeldbereich reduziert, (2) fur eine feste Elektronendichte die Zyklotronresonanzmasse ein oszillatorisches Verhalten als Funktion des Magnetfeldes zeigt. Die Polaron-Zyklotronresonanzmasse iiimmt minimale Werte an, wenn der Fullfaktor durch ganzzahlige Werte geht. Zweitens, wird der EinfluB einer statischen Abschirmung auf die Polaronenzyklotronresonanzmasse untersucht. Es wird gefunden, daD die Renormierung der Zyklotronresonanzmasse weiter reduziert wird. Der EinfluS der endlichen Breite der zweidimensionalen Elektronenschicht wird in die angegebenen Berechnungen durch Beriicksichtigung des niedrigsten Subbandes einbezogen. Nach Beriicksichtigung dcr NichtparabolizitLt des Elektronenenergiebandes wird die berechnete Zyklotronresonanzrnasse mit neueren experimentellen Werten fur GaAs-A11 -,Ga,As-Heterostrukturen verglichen. Es wird gute ffbereinstimmung im magnetischen Hochfeldbereich, d. h. fur Magnetfelder H > 12 T gefunden.

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Cyclotron Resonance of Polarons in Two Dimensions

Devreese

Peeters

1988

Properties of Impurity States in Superlattice Semiconductors

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Cyclotron Resonance Spectrum of 2D Polarons

Cited by 20 publications

References 43 publications

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Influence of Many‐Body Effects on the Cyclotron Resonance Mass of Two‐Dimensional Polarons with Application to GaAsAl_1−xGa_xAs Heterostructures

Cyclotron Resonance of Polarons in Two Dimensions

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Cyclotron Resonance Spectrum of 2D Polarons

Cited by 20 publications

References 43 publications

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

Influence of Many‐Body Effects on the Cyclotron Resonance Mass of Two‐Dimensional Polarons with Application to GaAsAl1−xGaxAs Heterostructures

Cyclotron Resonance of Polarons in Two Dimensions

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Influence of Many‐Body Effects on the Cyclotron Resonance Mass of Two‐Dimensional Polarons with Application to GaAsAl_1−xGa_xAs Heterostructures