2006/05/31 by I. Tsukada, Shimpei Ono, S. Ono · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Cuprate #Doping #Electrical resistivity and conductivity #Geometry #Hall effect #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Materials science #Mathematical analysis #Mathematics #Physics #Physics of Superconductivity and Magnetism #Plane (geometry) #Quantum mechanics #Sign (mathematics) #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.74.134508
13 pages including 4 color figures (eps files), submitted to PRB
arxiv created 2006/08/25 · openalex publication_date 2006/10/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The Hall coefficient (RH) is investigated along the in-plane direction of carefully prepared La_2\ensuremath-xSrxCuO4 thin films from x=0.08 to 0.40. It is found that RH becomes almost temperature independent around room temperature for x\ensuremath\geqslant0.24, and its sign smoothly changes from positive to negative between x=0.28 and 0.32, showing contrasting behavior to previously reported results. This result indicates that the carrier can be doped smoothly across the hole- to electron-dominant regions. According to the sign change of RH, superconductivity disappears for x\ensuremath\geqslant0.32 films, which suggests that a positive RH is one of the necessary conditions for superconductivity in p-type cuprates.