Thermoelectric properties and scattering mechanisms in natural PbS

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dc.authoridZuniga-Puelles, Esteban/0000-0002-9803-9717
dc.authoridHimcinschi, Cameliu/0000-0002-5572-0393
dc.authoridSevik, Cem/0000-0002-2412-9672
dc.authoridGurel, Tanju/0000-0002-2623-5081
dc.authoridOzden, Ayberk/0000-0002-4701-0201
dc.authoridLevytskyy, Volodymyr/0000-0003-0874-8833
dc.contributor.authorZuniga-Puelles, Esteban
dc.contributor.authorLevytskyi, Volodymyr
dc.contributor.authoroezden, Ayberk
dc.contributor.authorGuerel, Tanju
dc.contributor.authorBulut, Nebahat
dc.contributor.authorHimcinschi, Cameliu
dc.contributor.authorSevik, Cem
dc.date.accessioned2024-10-29T17:58:41Z
dc.date.available2024-10-29T17:58:41Z
dc.date.issued2023
dc.departmentTekirdağ Namık Kemal Üniversitesien_US
dc.description.abstractX-ray diffraction and energy dispersive x-ray spectroscopic analyses showed a natural galena (PbS) crystal from Freiberg in Saxony (Germany) to be a single phase specimen [rock salt (NaCl) structure type, space group Fm3m, a = 5.932(1) angstrom] with stoichiometric composition and an enhanced dislocation density (8 approximate to 1011 cm-2). The latter parameter leads to an increase of the electrical resistivity in the high-temperature regime, as well as to the appearance of phonon resonance with a characteristic frequency coPR = 3.8(1) THz. Being in the same range (i.e., 3-5.5 THz) with the sulfur optical modes of highest group velocities, it results in a drastic reduction (by similar to 75%) of thermal conductivity (K) at lower temperatures (i.e., < 100 K), as well as in the appearance of a characteristic minimum in K at T approximate to 30 K. Furthermore, the studied galena is characterized by phonon-drag behavior and by temperature dependent switch of the charge carrier scattering mechanism regime (i.e., scattering on dislocations for T < 100 K, on acoustic phonons for 100 K < T < 170 K and on both acoustic and optical phonons for 170 K < T < 300 K). The combined theoretical calculation and optical spectroscopic study confirm this mineral to be a direct gap degenerate semiconductor. The possible origins of the second-order Raman spectrum are discussed.en_US
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG) [441856638]; DFG [422219907]en_US
dc.description.sponsorshipThis work was performed within the Deutsche Forschungsgemeinschaft (DFG) Project No. 441856638. The DynaCool- 12 system was acquired within the DFG Project No. 422219907. The authors thank U. Burkhardt, M. Eckert, S. Kostmann for metallographic preparation and analysis as well as G. Gaertner for performing IR optical measurements. We are grateful to T. Weigel and D. -C. Meyer for the assistance during single crystal diffraction experiments. The phonon transport calculations reported in this paper were partially performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA resources) .en_US
dc.identifier.doi10.1103/PhysRevB.107.195203
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.issue19en_US
dc.identifier.scopus2-s2.0-85161155152en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.107.195203
dc.identifier.urihttps://hdl.handle.net/20.500.11776/14454
dc.identifier.volume107en_US
dc.identifier.wosWOS:001009980400008en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Ben_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLattice Thermal-Conductivityen_US
dc.subjectP-Type Pbsen_US
dc.subjectOptical-Propertiesen_US
dc.subjectPoint-Defectsen_US
dc.subjectTransport-Propertiesen_US
dc.subjectLead Chalcogenidesen_US
dc.subjectPhonon-Scatteringen_US
dc.subjectCrystal-Structureen_US
dc.subjectRaman-Scatteringen_US
dc.subjectPerformanceen_US
dc.titleThermoelectric properties and scattering mechanisms in natural PbSen_US
dc.typeArticleen_US

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