We report on the quantum criticality of YbCu4Ni as revealed by our combined micro- and macro-measurements. We determine the crystal structure of YbCu4Ni with site mixing by neutron diffraction measurements, which suggests the possible presence of Kondo disorder. However, decreasing the local spin susceptibility distribution and the development of spin fluctuations below 10 K at ambient pressure by muon spin rotation and relaxation measurements suggests that YbCu4Ni exhibits quantum criticality. Therefore, our experimental results indicate that YbCu4Ni is a new material that exhibits quantum criticality under a zero magnetic field and ambient pressure.
Cite
@article{arxiv.2312.12775,
title = {Quantum Criticality in YbCu4Ni},
author = {Kotaro Osato and Takanori Taniguchi and Hirotaka Okabe and Takafumi Kitazawa and Masahiro Kawamata and Zhao Hongfei and Yoichi Ikeda and Yusuke Nambu and Dita Puspita Sari and Isao Watanabe and Jumpei G Nakamura and Akihiro Koda and Jun Gouchi and Yoshiya Uwatoko and Masaki Fujita},
journal= {arXiv preprint arXiv:2312.12775},
year = {2023}
}