Physical properties of Smx B6 single crystals

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

Resumen: We study the magnetic susceptibility, electrical resistivity, Hall effect, and heat capacity of single crystals of SmxB6 for x=1, 0.94, 0.8, and 0.75. Remarkably, the overall properties of the crystals do not qualitatively depend on the density of vacancies. The topological surface states are seen at low temperatures in the electrical transport properties as the bulk conductivity freezes out. Even a large number of Sm vacancies does not close the hybridization gap. The linear term in the specific heat ¿, of unclear origin, remains large but decreases gradually with x. The shoulder in the density of states, brought by the hybridized 4f states and observed in the susceptibility and the specific heat, does not move but decreases its height with decreasing x. The specific heat also displays a weak Schottky anomaly at about 1.5 K for all x, except for the x = 0.75 sample. This Schottky anomaly is only slightly field dependent and of unknown origin.

Idioma: Inglés

DOI: 10.1103/PhysRevB.99.045138

Año: 2019

Publicado en: PHYSICAL REVIEW B 99, 4 (2019), 045138 [8 pp]
ISSN: 2469-9950

Factor impacto SCIMAGO: 1.811 - Electronic, Optical and Magnetic Materials (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-73914-JIN
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-68204-R

Tipo y forma: Artículo (Versión definitiva)

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