Here, we report that K-doped BaMn2Bi2 shows no experimental evidence of superconductivity down to 1.5 K under pressures up to 35.6 GPa, however, a tetragonal to an orthorhombic phase transition is observed at pressure of 20 GPa. Theoretical calculations for the tetragonal and orthorhombic phases, on basis of our high-pressure XRD data, find that the AFM order is robust in both of the phases in pressurized Ba0.61K0.39Mn2Bi2. Our experimental and theoretical results suggest that the K-doped BaMn2Bi2 belongs to a strong Hunds AFM metal with a hybridization of localized spin electrons and itinerant electrons, and that its robust AFM order essentially prevents the emergence of superconductivity.
@article{arxiv.1404.5030,
title = {Robust antiferromagnetism preventing superconductivity in pressurized Ba0.61K0.39Mn2Bi2},
author = {Dachun Gu and Xia Dai and Congcong Le and Liling Sun and Qi Wu and Bayrammurad Saparov and Jing Guo and Peiwen Gao and Shan Zhang and Yazhou Zhou and Chao Zhang and Lun Xiong and Rui Li and Yanchun Li and Xiaodong Li and Jing Liu and Athena S. Sefat and Jiangping Hu and Zhongxian Zhao},
journal= {arXiv preprint arXiv:1404.5030},
year = {2015}
}