Thermoelectric effects in layered conductors in magnetic field

Galbova, O.; Ivanovski, G.; Krstovska, Danica

doi:10.1063/1.1645183

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…In the quasi-classical approximation, when ηε F , the quantized energy spectrum of charge carriers can be determined with the use of the rule for quantizing areas [21] S(ε, p B ) = 1 cos θ S 0 (ε, p B ) = 2π N + 1 2 (17) where S 0 (ε, p B ) = p y dp x is the projection onto the p x p y plane of the section of the isoenergy surface S(ε, p B ) by the plane p B = const. Quantum oscillation effects are due to the presence of features on the density of states of the charge carriers when their energy spectrum is quantized.…”

Section: Quantum Oscillations Of the Thermoelectric Powermentioning

confidence: 99%

“…To the best of our knowledge, a few theoretical papers were published concerning thermoelectric phenomena in Q2D conductors [17][18][19]. The investigation of thermoelectric phenomena in quantized magnetic fields opens new possibilities and may give many interesting data not only for the structure of the energy spectrum and the relaxation mechanisms of charge carriers.…”

Section: Introductionmentioning

confidence: 99%

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Oscillatory thermoelectric effect in quasi-two-dimensional organic conductors in a magnetic field

Krstovska¹,

Galbova²

2007

Can. J. Phys.

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A theoretical analysis is presented of the dependence of the thermoelectric power, when the temperature gradient is directed along the normal to the layers, in a layered conductor, with a quasi-two-dimensional electron energy spectrum on the magnitude and orientation of a strong magnetic field relative to the layers. The angular oscillations of the thermoelectric power, when the magnetic field is noticeably tilted from the normal to the layers result from the periodic dependence of the average electron velocity on the angle between the normal to the layers and the magnetic field. It is shown that, in a quantizing magnetic field at low temperatures, giant quantum oscillations of thermoelectric power as a function of both the magnetic field magnitude and the angle between the normal to the layers and the magnetic field occur. This quantum oscillation effect can be used with a high degree of accuracy as a good spectroscopic method for the experimental study of certain characteristics of a Fermi surface of quasi-two-dimensional organic conductors, such as the quasi-two-dimensionality parameter of the electron energy spectrum, cyclotron effective electron mass, and velocity distribution of charge carriers as well as an accurate determination of the extremal cross sections. PACS No.: 72.15.JfRésumé : Nous présentons une étude théorique de la dépendance de la puissance thermoélectrique en présence d'un gradient de température normal aux couches d'un conducteur qui montrent un spectre électronique quasi 2-D en énergie, en fonction de la grandeur et de l'orientation par rapport à la normale aux couches d'un champ magnétique fort. Les oscillations angulaires de la puissance thermoélectrique, lorsque le champ magnétique est significativement incliné par rapport à la normale aux couches, résulte de la dépendance périodique de la vitesse électronique moyenne sur l'angle entre la normale aux couches et le champ magnétique. Nous montrons que dans un champ magnétique quantifiant à basse température, apparaissent des oscillations quantiques géantes de la puissance thermoélectrique comme fonction à la fois de la grandeur du champ magnétique et de l'angle qu'il fait avec la normale. Cette oscillation quantique peut être utilisée avec haute précision comme méthode spectroscopique pour des études expérimentales de certaines caractéristiques de la surface de Fermi de conducteurs organiques quasi 2-D, comme le paramètre de quasi 2-D du spectre en énergie des électrons, la masse cyclotronique efficace, la distribution en vitesse des porteurs de charge, ainsi que la détermination des sections extrêmales.[Traduit par la Rédaction]

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Section: Quantum Oscillations Of the Thermoelectric Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oscillatory thermoelectric effect in quasi-two-dimensional organic conductors in a magnetic field

Krstovska¹,

Galbova²

2007

Can. J. Phys.

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“…A number of publications appeared in which the results of experimental (see ref. [13]) and theoretical studies [14][15][16] of the thermoelectric coefficients were reported.…”

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confidence: 99%

Thermoelectric mechanism of electromagnetic-acoustic transformation in organic conductors

Krstovska¹,

Galbova²,

Sandev³

2008

Europhys. Lett.

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The thermoelectric mechanism of electromagnetic-acoustic transformation of the energy in an organic conductor with a quasi-two-dimensional electron energy spectrum (Q2D) placed in an external magnetic field has been considered. The amplitude of the acoustic wave excited by the temperature oscillations in a Q2D organic conductor was calculated for both the isothermal and the adiabatic thermal boundary condition. Angular oscillations of the amplitude resulting from the periodic dependence of the electron velocity on the angle between the normal to the layers and the magnetic field has been observed as expected. A comparison with the inductive mechanism of EMAT is made in order to determine the conditions at which the thermoelectric mechanism is dominant over the inductive one in the presence of a magnetic field. The thermoelectric mechanism of EMAT allows new important information on the electronic structure of the organic layered conductors to be obtained.

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Thermoelectric effects in layered conductors in magnetic field

Cited by 2 publications

References 4 publications

Oscillatory thermoelectric effect in quasi-two-dimensional organic conductors in a magnetic field

Oscillatory thermoelectric effect in quasi-two-dimensional organic conductors in a magnetic field

Thermoelectric mechanism of electromagnetic-acoustic transformation in organic conductors

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