Electron cyclotron mass in undoped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Cd</mml:mi><mml:mi mathvariant="normal">Te</mml:mi><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">Cd</mml:mi><mml:mi mathvariant="normal">Mn</mml:mi><mml:mi mathvariant="normal">Te</mml:mi></mml:mrow></mml:math>quantum wells

Dremin, A. A.; Yakovlev, D. R.; Sirenko, A. A.; Gubarev, S. I.; Shabelsky, O. P.; Waag, A.; Bayer, М.

doi:10.1103/physrevb.72.195337

Cited by 12 publications

(10 citation statements)

References 32 publications

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“…Indeed, due to the temperature-dependent Brillouin function in the second term of Eq. (9) the Zeeman splitting becomes comparable to the [61]. For the calculations we also used T Mn = T and literature data of T 0 = 0.8 K and S 0 = 2.2 for x = 0.015, see Ref.…”

Section: Discussionmentioning

confidence: 99%

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

et al. 2017

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We report on the observation of magnetic quantum ratchet effect in (Cd,Mn)Te-and CdTe-based quantum well structures with an asymmetric lateral dual grating gate superlattice subjected to an external magnetic field applied normal to the quantum well plane. A dc electric current excited by cw terahertz laser radiation shows 1/B oscillations with an amplitude much larger as compared to the photocurrent at zero magnetic field. We show that the photocurrent is caused by the combined action of a spatially periodic in-plane potential and the spatially modulated radiation due to the near-field effects of light diffraction. Magnitude and direction of the photocurrent are determined by the degree of the lateral asymmetry controlled by the variation of voltages applied to the individual gates. The observed magneto-oscillations with enhanced photocurrent amplitude result from Landau quantization and, for (Cd,Mn)Te at low temperatures, from the exchange enhanced Zeeman splitting in diluted magnetic heterostructures. Theoretical analysis, considering the magnetic quantum ratchet effect in the framework of semiclassical approach, describes quite well the experimental results.

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Section: Discussionmentioning

confidence: 99%

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

et al. 2017

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“…There exist many parameters which affect on the effective mass of carriers in the CdTe-Cd 1−x Mn x Te MQWs, such as growth direction, well width, strain, polaron effect due to the electron-phonon interaction [19,20]. Equations (13) and (14) give only the dependence of the effective mass to composition and the effect of the other parameters is ignored.…”

Section: Resultsmentioning

confidence: 99%

“…In polar semiconductors, plasmon of free carriers intract with longitudinal optical (LO) phonon via macroscopic electric field. Due to the effect of the LO phonon-plasmon coupling (polaronic effects) the frequencies of the LO phonons are shifted [9,22] and allow the determination of the free carrier concentration and it is the only significant effect of the plasmon on the phonon response. The experimental results have shown that the polaronic effects on the effective mass of MQWs are reduced in comparison with the results for the bulk semiconductor [9].…”

Section: Resultsmentioning

confidence: 99%

“…However, only limited data have been reported so far for the II-VI family of MQWs [9]. In doped samples there exist the longitudinal optical phonon-plasmon coupled (LPP) modes, which are interesting for physical interactions between the lattice vibration and free carriers, and can be directly investigated using infrared magnetoplasmon reflectivity spectra.…”

Section: Introductionmentioning

confidence: 99%

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The Magneto-Optical Response of Diluted Magnetic Semiconductor CdTe-Cd_1-xMn_xTe Multi Quantum Wells in the Voigt Configuration

Hidari

Shayesteh

2009

Acta Phys. Pol. A

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We have calculated the s-and p-polarized far infrared magnetoplasmon spectra of doped CdTe-Cd1−xMnxTe multi quantum wells in the presence of a static magnetic field up to 20 T parallel to the surface of the layers using a macroscopic model based on effective medium theory, using a novel approach which gives a good account of the data together with a clear physical interpretation of the various spectral features, such as the free carrier and optical phonon properties. The results show that the transverse optical modes (for the whole composition range, x = 0 to 1) are sensitive and change linearly with respect to the composition parameter. In p-polarized reflectivity the cyclotron resonance experiences a blue shift when the magnetic field strength increases. Also, the analysis of the dielectric tensor function and the Voigt dielectric function is used to determine the carriers' cyclotron effective masses (for both holes and electrons) as a function of composition. Furthermore, a modified random element iso-displacement approach has been extended for the multi layers to analyze the influence of the composition on the optical phonon response in the barrier layer.

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“…[6][7][8][9] Cadmium sulfide (CdS) is a II-VI semiconductor made of strong ionic bonding between Cd and S. An electron or an exciton in CdS is highly possible to be coupled to phonons due to the relatively large Froehlich coupling constant of 0.53, which is much larger than that of CdTe, GaAs, and GaP. [10,11] As can be seen in Figure 3, the Raman scattering intensity ratio of the 2LO and the 1LO of the CdS NWs is much larger than that of the CdS film, indicating strong resonance two-phonon coupling and excitonic scattering in the CdS NWs. [1] For CdS, the atomic masses of Cd and S have a relatively large difference.…”

Section: Introductionmentioning

confidence: 99%

Enhanced anharmonic phonon coupling and decay dominated by low‐energy phonons in CdS nanowires

Iqbal

Saeed

et al. 2019

J Raman Spectroscopy

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Low‐energy optical phonons with energy in the order of that of acoustic phonons are readily populated at room temperature, and therefore, they play a key role in thermal, electronic, and thermo‐electric fundamental processes in a solid material. High‐quality crystalline cadmium sulfide (CdS) nanowires with a diameter of several tens of nanometer and a length up to several micrometers (3–5 μm) demonstrate strong exciton–phonon coupling. This strong coupling interaction allows us to observe low‐energy optical phonons and their anharmonic couplings to high‐energy phonon modes. In this study, second and higher order multiphonons related to the E2low phonon were observed in near resonance Raman scattering condition (excitation wavelength of 532 nm). The clear observation of the multiphonon modes makes it possible to study composite phonon anharmonic decay. The experimental results show that low‐energy phonons (both optical and acoustical) dominate anharmonic phonon decay in CdS.

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Electron cyclotron mass in undopedCdTe∕CdMnTequantum wells

Cited by 12 publications

References 32 publications

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

The Magneto-Optical Response of Diluted Magnetic Semiconductor CdTe-Cd_1-xMn_xTe Multi Quantum Wells in the Voigt Configuration

Enhanced anharmonic phonon coupling and decay dominated by low‐energy phonons in CdS nanowires

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Electron cyclotron mass in undopedCdTe∕CdMnTequantum wells

Cited by 12 publications

References 32 publications

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

Magnetic quantum ratchet effect in (Cd,Mn)Te- and CdTe-based quantum well structures with a lateral asymmetric superlattice

The Magneto-Optical Response of Diluted Magnetic Semiconductor CdTe-Cd1-xMnxTe Multi Quantum Wells in the Voigt Configuration

Enhanced anharmonic phonon coupling and decay dominated by low‐energy phonons in CdS nanowires

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The Magneto-Optical Response of Diluted Magnetic Semiconductor CdTe-Cd_1-xMn_xTe Multi Quantum Wells in the Voigt Configuration