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

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.

6 pages, 6 figures

References in corpus (5)

• Toroidal order in metals without local inversion symmetry
• S wave superconductivity in newly discovered superconductor BaTi${}_2$Sb${}_2$O revealed by ${}^{121/123}$Sb-NMR/Nuclear Quadrupole Resonance measurements
• Magnetoelectric Effect in the Antiferromagnetic Ordered State of Ce${}_3$TiBi${}_5$ with Ce Zig-Zag Chains
• Coexistence of multiple charge-density waves and superconductivity in SrPt2As2 revealed by 75As-NMR/NQR and 195Pt-NMR
• Charge fluctuations and nodeless superconductivity in quasi-one-dimensional Ta${}_4$Pd${}_3$Te${}_{16}$ revealed by ${}^{125}$Te-NMR and ${}^{181}$Ta-NQR