Laha, A. and Kanchana, V. and et al, .
(2019)
Magnetotransport properties of the correlated topological nodal-line semimetal YbCdGe.
Physical Review B.
ISSN 2469-9950
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Abstract
Realization of strong correlation effect in topological materials is very rare due to lack of ideal systems. In this work, we present the magnetotransport properties of a correlated nodal-line semimetal YbCdGe. A valence fluctuating state has been observed through magnetic susceptibility and specific heat data. This compound shows an extremely large, non-saturating transverse magnetoresistance (1.14
10
3
at 3 K and 12 T). The cusp-like magnetoconductivity at low magnetic field indicates the presence of weak anti-localization. The origin of this phenomenon is further supported from the direction dependent transport measurements. Magnetic field-induced metal-semiconductor-like crossover and a plateau in resistivity are observed at low temperature which are common features of topological semimetals. Hall measurement and electronic band-structure calculation suggest that YbCdGe is a topological nodal-line semimetal with higher carrier (hole) density than a typical Dirac/Weyl semimetal.
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