2014/07/22 by Jianzhong Liu, Sheng Li, Yu-Feng Li +4 · 19 citations
Materials Science · Mathematics · Physics and Astronomy · #Algorithm #Condensed matter physics #Electrical resistivity and conductivity #Electronic and Structural Properties of Oxides #Ground state #Hydrostatic pressure #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Materials science #Mathematics #Phase (matter) #Physics #Quantum mechanics #State (computer science) #Superconductivity #Thermodynamics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.90.094507
published in Physical Review B 90(9) (American Physical Society) · 6 pages, 4 figures
arxiv created 2014/07/22 · openalex publication_date 2014/09/12 · arxiv updated 2014/09/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
By using a hydrostatic pressure, we have successfully tuned the normal state property and superconductivity in LaO0.5F0.5BiSe2 single crystals. It is found that, with the increase of pressure, the original superconducting phase with Tc\ensuremath∼3.5 K can be tuned to a state with lower Tc, and then a new superconducting phase with Tc\ensuremath∼6.5 K emerges. Accompanied by this crossover, the normal state is switched from that with a low temperature resistivity upturning to a metallic one. Accordingly, the normal state resistivity also shows a nonmonotonic change with the external pressure. Furthermore, by applying a magnetic field, the new superconducting state under pressure with Tc\ensuremath∼6.5 K is suppressed, and the recovered normal state reveals a resistivity-upturning feature again. These results illustrate a nontrivial relationship between the normal state property and superconductivity in this newly discovered superconducting system.