Resonant acceptor states in diluted magnetic semiconductor (Cd1−x−yZnxMny)3As2

Laiho, R.; Лисунов, K. Г.; Shubnikov, M. L.; Stamov, V N; Захвалинский, В. С.

doi:10.1016/s0038-1098(99)00135-0

Cited by 2 publications

(10 citation statements)

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“…On the other hand, in this case we have not received substantial additional information on the band structure. In contrast to [20], wherein in the rather narrow band solid solution the acceptor narrow band resonant with the conduction band were observed. As it is known in semiconductors [18], including gapless semi conductors [13], the cyclotron mass should not depend on the magnetic field.…”

Section: Resultsmentioning

confidence: 65%

“…In single crystals of prototype material (Cd 1−x Zn y ) 3 As 2 , the SdH oscillations showed no strong dependence on the crys tallographic direction [7]. In our studies of the magnetoresist ance for Mndoped samples [11,18,20] the variation between the samples of the same composition the cutted in different directions was not more than 1-2%. These differences are comparable to the errors occurring from nonequipotential and differences of the probes resistance.…”

Section: Methodsmentioning

confidence: 62%

“…This decrease will be small, and is comparable to the growth of n due to the compression of the material. This leads to a decrease in Δ SdH ( p ) when p increases [20]. However, as mentioned above, in the CZMA samples (x + y = 0.2) the dependence m c (B) was not observed.…”

Section: Resultsmentioning

confidence: 79%

“…Therefore, the proper ties of CZMA should be influenced by the band charge carriers occupying states that are significantly higher than the bottom of the conduction band. According to the band structure of type InSb, the band gap at low temperatures was calculated using the linear relationship E 0 [eV] = −0.095 + 1.2x (where x is the total concentration of Zn and Mn) [20].…”

Section: Resultsmentioning

confidence: 99%

“…22 eV and E A2 ≈ 0.29 eV, their width is D 1 ≈ 15 meV and D 2 ≈ 10 meV, the value of the density of states g A1 (E A1 ) ≈ 4.1 × 10 19 eV −1 cm −3 and g A2 (E A2 ) ≈ 6.3 × 10 19 eV −1 cm −3 . Behavior of these zones and the Fermi energy dependence on the pressure is described in [20]. These reso nance zones depends in different ways on the pressure and each pair of samples had an equal concentration of charge car riers n R (0).…”

Section: Resultsmentioning

confidence: 99%

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Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Захвалинский

Nikulicheva

Lähderanta

et al. 2017

J. Phys.: Condens. Matter

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Shubnikov-de Haas (SdH) effect and magnetoresistance measurements of single crystals of diluted II-V magnetic semiconductors (Cd Zn Mn )As (x + y = 0.4, y = 0.04 and 0.08) are investigated in the temperature range T = 4.2 ÷ 300 K and in transverse magnetic field B = 0 ÷ 25 T. The values of the cyclotron mass m , the effective g-factor g*, and the Dingle temperature T are defined. In one of the samples (y = 0.04) a strong dependence of the cyclotron mass on the magnetic field m (B) = m(0) + αB is observed. The value of a phase shift close to β = 0.5 indicates the presence of Berry phase and 3D Dirac fermions in a single crystals of (Cd Zn Mn )As in one of the samples (y = 0.08).

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Section: Resultsmentioning

confidence: 65%

Section: Methodsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Захвалинский

Nikulicheva

Lähderanta

et al. 2017

J. Phys.: Condens. Matter

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Linear dispersion of Dirac fermions in (Cd_1–x–yZn_xMn_y)₃As₂, х+y = 0.2, у = 0.02, 0.04, 0.06, 0.08 solid solutions

Захвалинский¹,

Nikulicheva²,

Pilyuk³

et al. 2021

Phys. Scr.

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Based on the results of the Shubnikov-de Haas oscillations study in single-crystalline diluted magnetic semiconductors (Cd1−x−yZnxMny)3As2 (CZMA) with х + y = 0.2 and Mn content (у = 0.02, 0.04, 0.06, 0.08) at temperatures T = 4.2 to 30 K and magnetic fields B = 0 to 12 T under hydrostatic pressure p = 0 and 10 kbar, the values of the phase shift β, indicating the existence of the Berry phase in all samples were determined. Thickness of two-dimensional surface topological nanolayers in CZMA (х + y = 0.2) single crystals was defined. The rise in Mn concentration led to an increase in the concentration of charge carriers in the 2D surface layers n 2D and a decrease in its mobility μ 2D. The reduced cyclotron mass m с (0)/m 0, depending on the Fermi wave vector k F , experimentally observed from the Shubnikov-de Haas oscillations, which was in a good agreement with the prediction theory of linear dependence and experimental results in topological insulator single crystals Bi2Se3 indicated that Dirac fermions were present in a diluted magnetic semiconductor CZMA system with х + y = 0.2. The damping of the Shubnikov-de Haas oscillations for pressures p = 0 and 10 kbar in the CZMA sample (х + y = 0.2; y = 0.2) was found to be associated with an amplitude decrease by spin splitting (Zeeman effect). From the analysis of experimental data, the effective Lande factor g = 7.63 and 7.87 and the band gap Δ =35.3 and 9.7 meV at p = 0 and 10 kbar, respectively, were obtained.

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Resonant acceptor states in diluted magnetic semiconductor (Cd1−x−yZnxMny)3As2

Cited by 2 publications

References 9 publications

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Linear dispersion of Dirac fermions in (Cd_1–x–yZn_xMn_y)₃As₂, х+y = 0.2, у = 0.02, 0.04, 0.06, 0.08 solid solutions

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Resonant acceptor states in diluted magnetic semiconductor (Cd1−x−yZnxMny)3As2

Cited by 2 publications

References 9 publications

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd1−x−yZnxMny)3As2solid solutions

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd1−x−yZnxMny)3As2solid solutions

Linear dispersion of Dirac fermions in (Cd1–x–yZnxMny)3As2, х+y = 0.2, у = 0.02, 0.04, 0.06, 0.08 solid solutions

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Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Anomalous cyclotron mass dependence on the magnetic field and Berry’s phase in (Cd_1−x−yZn_xMn_y)₃As₂solid solutions

Linear dispersion of Dirac fermions in (Cd_1–x–yZn_xMn_y)₃As₂, х+y = 0.2, у = 0.02, 0.04, 0.06, 0.08 solid solutions