Metal-to-Insulator Crossover in the Low-Temperature Normal State ofBi2Sr2−xLaxCuO6+δ

2000/05/26 by S. Ono, Shimpei Ono, Yoichi Ando +7 · 14 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.85.638

published as Phys. Rev. Lett. 85, 638-641(2000). · 4 pages, 5 figures, accepted for publication in PRL

arxiv created 2000/05/26 · openalex publication_date 2000/07/17 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28

Abstract

We measure the normal-state in-plane resistivity of Bi(2)Sr(2-x)La(x)CuO(6+delta) single crystals at low temperatures by suppressing superconductivity with 60 T pulsed magnetic fields. With decreasing hole doping, we observe a crossover from a metallic to an insulating behavior in the low-temperature normal state. This crossover is estimated to occur near 1/8 doping, well inside the underdoped regime, and not at optimum doping as reported for other cuprates. The insulating regime is marked by a logarithmic temperature dependence of the resistivity over two decades of temperature, suggesting that a peculiar charge localization is common to the cuprates.

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