Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2

Autor:	Fujioka, Masaya, Tanaka, Masashi, Denholme, Saleem J., Yamaki, Takuma, Takeya, Hiroyuki, Yamaguchi, Takahide, Takano, Yoshihiko
Rok vydání:	2014
Předmět:	Condensed Matter - Superconductivity
Zdroj:	EPL 108 (2014) 47007
Druh dokumentu:	Working Paper
DOI:	10.1209/0295-5075/108/47007
Popis:	We have demonstrated a pressure-induced phase transition from a low-Tc phase to a high-Tc phase in a single crystal of the superconductor LaO0.5F0.5BiSe2. The high-Tc phase appears at 2.16 GPa and the maximum superconducting transition temperature (Tc) is observed at 6.7 K under 2.44 GPa. Although the anisotropy ({\gamma}) for the low-Tc phase is estimated to be 20, it is reduced by around half (9.3) in the high-Tc phase. This tendency is the same for the BiS2 system. The Tc of LaO0.5F0.5BiSe2 has continued to increase up to the maximum pressure of this study (2.44 GPa). Therefore applied further pressure has the potential to induce a much higher Tc in this system. Comment: 12 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1408.0108 Zobrazit plný text záznamu View this record from Arxiv