Shubnikov–de Haas Thermoelectric Field Oscillations in Layered Conductors in the Vicinity of a Topological Lifshits Transition
Rattachement africain : ua, cz, mk, gr. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract We have studied the response of a layered conductor with a quasi-two-dimensional electron spectrum and a multisheet Fermi surface (FS) formed by two weakly corrugated cylinders and two planar sheets adjoining these cylinders to nonuniform heating. As a result of action of pressure on the conductor or its doping with impurity atoms, distance Δp between the FS cylinder and planar sheets can be reduced to such an extent that conduction electrons begin roaming over these sheets, tunneling from one FS sheet (cavity) to the other. If a conduction electron can visit several times all FS sheets during its mean free time, its motion in the plane orthogonal to the magnetic field becomes finite. In this case, Shubnikov–de Haas oscillations are excited with a period determined by the closed area circumscribed by the electron during its motion in the magnetic-breakdown trajectory in the momentum space. We have calculated the dependence of the thermoelectric field on the magnitude and orientation of a quite strong quantizing magnetic field. In a magnetic field normal to the layers, the cross sections of the cylindrical part of the FS are equidistant from both FS planar sheets. However, this equidistance is violated even for a small deviation of the field from the normal to the layers by angle ϑ, and, at a certain value ϑk of this angle, the probability of magnetic breakdown to one of the FS planar sheets can be so low that the electron cannot close the magnetic-breakdown trajectory, and its motion over the other planar sheet with a visit to the FS cylindrical part becomes infinite. In this case, the magnetic-breakdown quantum oscillations of magnetization and all kinetic characteristics of the conductor disappear, and their disappearance is repeated periodically with a change in the slope of the magnetic field to the layers as a function of tanϑ.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Shubnikov–de Haas Thermoelectric Field Oscillations in Layered Conductors in the Vicinity of a Topological Lifshits Transition
- Date Crossref
- 01/08/2019
- Éditeur
- Pleiades Publishing Ltd
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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National Academy of Sciences of Ukraine pays non établi dans la noticeOrganisme public
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B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine pays non établi dans la noticeStructure de recherche
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V. N. Karazin Kharkiv National University pays non établi dans la noticeUniversité ou école supérieure
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FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic pays non établi dans la noticeStructure de recherche
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Ss. Cyril and Methodius University in Skopje pays non établi dans la noticeUniversité ou école supérieure
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University of West Attica pays non établi dans la noticeUniversité ou école supérieure
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Karazin Kharkov National University pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Natural Sciences and Mathematics Institute of Physics pays non établi dans la noticeUniversité ou école supérieure
National Academy of Sciences of Ukraine, B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine et V. N. Karazin Kharkiv National University, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.