Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김성진 | * |
dc.contributor.author | 한미경 | * |
dc.date.accessioned | 2022-02-22T16:30:05Z | - |
dc.date.available | 2022-02-22T16:30:05Z | - |
dc.date.issued | 2022 | * |
dc.identifier.issn | 0022-3727 | * |
dc.identifier.other | OAK-30901 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/260547 | - |
dc.description.abstract | The optimization of thermoelectric properties of the CuCrS Se x (x = 0, 0.5, 1.0, 1.5, 2) samples was achieved by substitution in anionic sublattice and sintering at high temperature. The maximum power factor PF ∼ 0.3 mW (m•K)-2 among a series of samples with chalcogen substitution was obtained for CuCrS0.5Se1.5 sample at T = 300 K. The sintering made it possible to obtain the maximum value PF ∼ 2.1 mW (m•K)-2 for CuCrSe2 sample. This is due to a more than threefold increase in the thermopower S(T) in CuCrSe2 sample with a spin-orbital interaction in comparison with CuCrS0.5Se1.5 sample with the same optimal electrical conductivity σ ( 100 S cm-1), but without spin-orbital interaction. In CuCrSe2 sample, sintering effectively reduced the σ to an optimal value, suppressed of the magnetic phase transition in the range of 50-100 K, and the weak localization were replaced by weak antilocalization indicating the appearance of strong spin-orbit interaction below 20 K. As a result, an additional contribution to the S(T) appeared due to the filtration of current carriers caused by the strong spin-orbit interaction. The effect of grain boundaries on the properties σ and S(T) of the samples was investigated. It was established that polycrystalline samples with a high sulfur content were low-conductivity materials consisting of high-conductivity crystallites with the charge carriers concentration cm-3 separated by low-conductivity grain boundaries with fluctuation-induced tunneling conductivity. Both the replacement of sulfur with selenium and sintering led to a decrease in the energy barriers connecting grain boundaries. Selenium-dominated samples (CuCrS0.5Se1.5 and CuCrSe2) had high electrical conductivity with negligible energy barriers between grain boundaries. Logarithmic quantum corrections to the electrical conductivity was observed below 20 K, which indicated a quasi-two-dimensional electron transport in these samples. © 2021 IOP Publishing Ltd. | * |
dc.language | English | * |
dc.publisher | IOP Publishing Ltd | * |
dc.subject | filtration of current carriers | * |
dc.subject | replacing chalcogens | * |
dc.subject | sintering | * |
dc.subject | spin-orbit interaction | * |
dc.subject | thermoelectric | * |
dc.title | Enhanced thermoelectric properties of polycrystalline CuCrS2-xSex(x = 0, 0.5, 1.0, 1.5, 2) samples by replacing chalcogens and sintering | * |
dc.type | Article | * |
dc.relation.issue | 13 | * |
dc.relation.volume | 55 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | Journal of Physics D: Applied Physics | * |
dc.identifier.doi | 10.1088/1361-6463/ac453e | * |
dc.identifier.wosid | WOS:000736757200001 | * |
dc.identifier.scopusid | 2-s2.0-85123455109 | * |
dc.author.google | Romanenko A.I. | * |
dc.author.google | Chebanova G.E. | * |
dc.author.google | Katamanin I.N. | * |
dc.author.google | Drozhzhin M.V. | * |
dc.author.google | Artemkina S.B. | * |
dc.author.google | Han M.-K. | * |
dc.author.google | Kim S.-J. | * |
dc.author.google | Wang H. | * |
dc.contributor.scopusid | 김성진(56812714700) | * |
dc.contributor.scopusid | 한미경(36069389600) | * |
dc.date.modifydate | 20240405124638 | * |