Physical properties of SmxB6 single crystals

Stankiewicz, Jolanta; Evangelisti, Marco; Rosa, Priscila F. S.; Schlottmann, Pedro; Fisk, Zachary

doi:10.1103/physrevb.99.045138

Title: Physical properties of Sm_xB₆ single crystals

Journal Article · 23 January 2019 · Physical Review B

DOI: https://doi.org/10.1103/physrevb.99.045138 · OSTI ID:1650618

Stankiewicz, Jolanta ^[1]; Evangelisti, Marco ^[1];

^[2]; Schlottmann, Pedro ^[3]; Fisk, Zachary ^[4]

Univ. de Zaragoza (Spain)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Florida State Univ., Tallahassee, FL (United States)
Univ. of California, Irvine, CA (United States)

We study the magnetic susceptibility, electrical resistivity, Hall effect, and heat capacity of single crystals of Sm_xB₆ 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 γ, 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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: MINECO; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1650618

Report Number(s):: LA-UR--19-23590

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 99; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Investigation of high-temperature bulk transport characteristics and skew scattering in samarium hexaboride Rakoski, Alexa; Eo, Yun Suk; Kurdak, Çağlıyan arXiv https://doi.org/10.48550/arxiv.1907.09436	preprint	January 2019

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Title: Physical properties of Sm_xB₆ single crystals