Anomalous anisotropic compression behavior of superconducting CrAs under high pressure
2015
Yu, Zhenhai | Wu, Wei | Hu, Qingyang | Zhao, Jinggeng | Li, Chunyu | Yang, Ke | Cheng, Jinguang | Luo, Jianlin | Wang, Lin | Mao, Ho-kwang
Significance We preformed high-pressure structural studies of CrAs to understand the physical mechanism of its pressure-induced superconductivity. It was found that the lattice parameters a and c both demonstrate a nonmonotonic change, and the lattice parameter b undergoes a rapid contraction at ∼0.18–0.35 GPa, which suggests that a pressure-induced isostructural phase transition occurs in CrAs. Above the phase transition pressure, the axial compressibilities of CrAs present remarkable anisotropy. The pressure-related structural changes occurred concurrently with the appearance of bulk superconductivity, shedding light on the structural and related electronic responses to high pressure, which play a key role toward understanding the superconductivity of CrAs.
Mostrar más [+] Menos [-]Información bibliográfica
Este registro bibliográfico ha sido proporcionado por National Agricultural Library