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Nonmagnetic Phase Transition in La$_3$TiSb$_5$ Observed in $^{121}$Sb Nuclear Quadrupole Resonance

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arxiv 2408.00408 v1 pith:FET5OWAY submitted 2024-08-01 cond-mat.str-el

Masahiro Manago , Gaku Motoyama , Shijo Nishigori , Kenji Fujiwara , Hisatomo Harima This is my paper · ORCID
classification cond-mat.str-el
keywords nucleartisbtransitionexhibitednonmagneticphasequadrupoleresistivity
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abstract

We measured the electrical resistivity and the $^{121}$Sb nuclear quadrupole resonance (NQR) spectra of La$_3$TiSb$_5$, which is a nonmagnetic reference system for a locally noncentrosymmetric antiferromagnet Ce$_3$TiSb$_5$, in order to determine its physical properties. The resistivity exhibited a hump anomaly at 120 K, suggesting a phase transition. The NQR spectra split below 110 K, whereas the nuclear spin-lattice relaxation exhibited no anomalies. These results can be explained by the incommensurate charge-density-wave (CDW) transition. This finding suggests the importance of quasi-one-dimensional characteristics and CDW instability in these systems.

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