Magnetophonon Resonance in Tellurium

Bresler, M. S.; Mashovets, D. V.

doi:10.1002/pssb.19700390208

Cited by 21 publications

(3 citation statements)

References 17 publications

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“…where p and p ⊥ = (p 2 x + p 2 y ) are the longitudinal and transverse, respectively, components of the momentum vector p with respect to the direction of the axis C 3 in the crystal. For p-Te, according to work [8], we have m = 0.26 m 0 and m ⊥ = 0.11 m 0 , where m 0 is the free electron mass.…”

Section: Theory and Adopted Modelmentioning

confidence: 99%

Dependences of Terahertz Radiation Emitted by Hot Charge Carriers in p-Te

2013

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Polarization dependences of the terahertz radiation emitted by hot charge carriers in p-Te have been studied both theoretically and experimentally. The angular dependences of the spontaneous radiation emission by hot carriers is shown to originate from the anisotropy of their dispersion law and the anisotropy of the dielectric permittivity of a tellurium crystal. We have shown that the polarization dependences of radiation are determined by the angle between the crystallographic axis C3 in p-Te and the polarization vector; they are found to have a periodic character. K e y w o r d s: terahertz radiation, hot carriers, polarization dependences

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Section: Theory and Adopted Modelmentioning

confidence: 99%

Dependences of Terahertz Radiation Emitted by Hot Charge Carriers in p-Te

2013

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“…Measurements on hot carriers performed by Nimtz and Seeger [8] could be explained by the polaron scattering mechanism for the heating of the free carriers by the electric field. Also measurements of the magnetoresistance (Bresler and Mashovets [9]) and cyclotron resonance (Button et al [lo]) in very strong magnetic fields give evidence for the polaron coupling.…”

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confidence: 99%

Polaron scattering of free carriers in tellurium

Selders

Gspan

Große

1971

Physica Status Solidi (b)

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Because the polaron coupling constant in tellurium is relatively large, polar optical scattering should be important in the charge transport by free carriers. Reflection and transmission measurements on heavily doped samples in the far infrared yield the amount and the frequency dependence of the free carrier scattering in the spectral region of the reststrahlen bands. From the amount of the increase in scattering a t the eigenfrequency of the LO phonons the contribution of polaron scattering can be determined.Wegen der relativ groDen Polaronenkopplungskonstanten wird im Tellur mit einem starkcn Beitrag der polaren optischen Streuung beim Ladungstransport der freien Triiger gerechnet. Reflexions-und Transmissionsmessungen a n hochdotierten Proben im fernen Infrarot ergeben die GroBe und die Frequenzabhangigkeit der Streuung der freien Ladungstriiger im spektralen Bereich der Reststrahlenbanden. Aus der Hohe des Anstiegs der Streuung bei der Eigenfrequenz der LO-Phononen kann der Beitrag der Polaronenstreuung ermittelt werden.

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“…3, were calculated (the arrows show the locations of corresponding maxima and minima; note that the highest peak is not taken into account because the corresponding magnetic field is close to the value of magnetic freezing-out at which the degeneracy of the samples under study vanishes). Using the calculations results [9], we found out that the chemical potential level of m holes in the valence band is about 1.5 meV from the band ceiling, and this value is smaller than the energy value of the saddle point in the Te holes spectrum (2.3 meV), i.е., the Fermi constant-energy surface in the samples under study can be considered ellipsoidal, and the number of ellipsoids in the Brillouin zone equals four [2]. Comparing the heat energy of the holes at T ¼ 1.5 K with the Fermi energy value we see that charge carriers are extremely degenerate (m/kT ) 1), i.е., one of the prerequisites of observing the SH effect has been satisfied.…”

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confidence: 95%

Galvanomagnetic effects in tellurium whiskers

Averkiev

Berezovets

Savchenko

et al. 2015

Physica Status Solidi (b)

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Galvanomagnetic effects on Te samples were studied. The measurements were made in the broad range of temperatures (1.5 K T 80 K) and the values of the magnetic field induction. Shubnikov-de-Haas oscillations (SH) were detected in strong magnetic fields (v c t ) 1, where v c is the cyclotrone frequency); as well as anomalous temperature dependence of the Hall potential in classically weak (v c t ( 1) magnetic fields. It was found out that the revealed SH oscillations are due to the Landau quantizations of the energy spectrum of three-dimensional (3D) charge carriers (holes) in the bulk samples under study. In the area of weak magnetic fields (v c t ( 1), the effect of anomalous magnetoresistance was found, which was due to the weak localization of 3D holes in the samples [1]. The theory of the Hall effect for holes in weak magnetic fields (B < 0.2 Т) was developed. It is based on the solution of kinetic Boltzmann equation with the specific type of the collision integral; taking into account the carriers energy spectrum in tellurium. It was shown that the peculiarities of the Hall effect temperature dependence; which were found experimentally in weak magnetic fields; can be qualitatively explained if we bear in mind the complex structure of tellurium valence band.

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Magnetophonon Resonance in Tellurium

Cited by 21 publications

References 17 publications

Dependences of Terahertz Radiation Emitted by Hot Charge Carriers in p-Te

Dependences of Terahertz Radiation Emitted by Hot Charge Carriers in p-Te

Polaron scattering of free carriers in tellurium

Galvanomagnetic effects in tellurium whiskers

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