Emergence of superconductivity near 11 K by suppressing the 3-fold helical-chain structure in noncentrosymmetric HgS

He Zhang, Wei Zhong, Yanghao Meng +4

The trigonal $\alpha$-HgS has a 3-fold helical chain structure, and is in form of a noncentrosymmetric $P{3}_{1}21$ phase, known as the cinnabar phase. However, under pressure, the helical…