@article{F.Hori_PRB_2025,
title = {Lu/Se substitution effect on magnetic properties of the Yb-based zigzag-chain semiconductor YbCuS2},
author = {F Hori and H Matsudaira and S Kitagawa and K Ishida and S Mizutani and H Shirai and T Onimaru
2},
url = {https://arxiv.org/abs/2412.18373},
doi = {10.1103/bypl-fd1q},
year = {2025},
date = {2025-08-07},
journal = {Physical Review B},
volume = {112},
pages = {064414},
abstract = {We have investigated the changes in the magnetic properties on YbCuS2 by Lu or Se substitutions from a microscopic perspective. In general, it is expected that nonmagnetic Lu substitution dilutes the magnetic Yb3+ concentration and that Se substitution induces the negative pressure in YbCuS2. The 63/65 Cu -nuclear quadrupole resonance (NQR) measurements on polycrystalline Yb0.9Lu0.1CuS2 and YbCu(S0.9Se0.1)2 revealed that the Se substitution leads to larger lattice expansion compared to the Lu substitution. The antiferromagnetic transition temperature 𝑇N decreased from 0.95 K in the unsubstituted system to 0.75 K in both substituted systems. Furthermore, the 𝑇-linear behavior of the 63 Cu -NQR spin-lattice relaxation rate 1/𝑇1, suggesting the presence of the gapless quasiparticle excitations, was observed even in the substituted systems and the value of 1/𝑇1𝑇 increases. These results under the chemical substitutions are opposite to those under pressure as previously reported and are consistent with the expectation. Our systematic study indicates a clear relationship between the magnetic ordered states and the quasiparticle excitations in YbCuS2.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
