Electrical transport properties of single-crystal CaB 6, SrB 6, and BaB 6

Stankiewicz, J. (Universidad de Zaragoza) ; Rosa, P.F.S. ; Schlottmann, P. ; Fisk, Z.

Resumen: The electrical resistivity and Hall effect of alkaline-earth-metal hexaboride single crystals are measured as a function of temperature, hydrostatic pressure, and magnetic field. The transport properties vary weakly with the external parameters and are modeled in terms of intrinsic variable-valence defects. These defects can stay either in (1) delocalized shallow levels or in (2) localized levels resonant with the conduction band, which can be neutral or negatively charged. Satisfactory agreement is obtained for electronic transport properties in a broad temperature and pressure range, although fitting the magnetoresistance is less straightforward and a combination of various mechanisms is needed to explain the field and temperature dependences.

Idioma: Inglés

DOI: 10.1103/PhysRevB.94.125141

Año: 2016

Publicado en: Physical Review B. Condensed Matter and Materials Physics 94, 12 (2016), 125141 [8 pp]
ISSN: 1098-0121

Factor impacto JCR: 3.836 (2016)

Categ. JCR: PHYSICS, CONDENSED MATTER rank: 18 / 67 = 0.269 (2016) - Q2 - T1

Factor impacto SCIMAGO: 2.339 - Electronic, Optical and Magnetic Materials (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/CAMRADS
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-38213-C02-01

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)