Electrical transport properties of CaB6
Stankiewicz, Jolanta (Universidad de Zaragoza) ; Sesé Monclús, Javier (Universidad de Zaragoza) ; Balakrishnan, Geetha ; Fisk, Zachary
Resumen: We report results from a systematic electron-transport study in a broad temperature range on 12 CaB6 single crystals. None of the crystals were intentionally doped. The different carrier densities observed presumably arise from slight variations in the Ca:B stoichiometry. In these crystals, the variation of the electrical resistivity and of the Hall effect with temperature can be consistently accounted for by the model we propose, in which B-antisite defects (B atom replacing Ca atom) are “amphoteric.” The magnetotransport measurements reveal that most of the samples we have studied are close to a metal-insulator transition at low temperatures. The magnetoresistance changes smoothly from negative—for weakly metallic samples—to positive values—for samples in a localized regime.
Idioma: Inglés
DOI: 10.1103/PhysRevB.90.155128
Año: 2014
Publicado en: Physical review. B, Condensed matter 90 (2014), 155128 [5 pp]
ISSN: 0163-1829
Financiación: info:eu-repo/grantAgreement/ES/DGA/CAMRADS
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-01
Tipo y forma: Article (Published version)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1103/PhysRevB.90.155128
Año: 2014
Publicado en: Physical review. B, Condensed matter 90 (2014), 155128 [5 pp]
ISSN: 0163-1829
Financiación: info:eu-repo/grantAgreement/ES/DGA/CAMRADS
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-01
Tipo y forma: Article (Published version)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2018-06-22-11:08:22)
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Record created 2018-06-22, last modified 2018-06-22