Transport properties of Ag5Pb2O6: A three-dimensional electron-gas-like system with low carrier density

Article

关键词: KADOWAKI-WOODS RATIO;    SUPERCONDUCTOR AG5PB2O6;    RESISTIVITY;    METALS;    OXIDE;    MAGNETORESISTANCE;    PRESSURE;   

DOI  :  10.1103/PhysRevB.88.205143

来源: SCIE

【 摘 要 】

We report normal-state transport properties of the single-crystalline samples of the silver-lead oxide superconductor Ag5Pb2O6, including the electrical resistivity, magnetoresistance, and Hall coefficient. From the Hall coefficient measurement, we confirmed that the carrier density of this oxide is as low as 5 x 10(21) cm(-3), one order of magnitude smaller than that for ordinary alkali metals and noble metals. The magnetoresistance behavior is well characterized by the axial symmetry of the Fermi surface and by a single relaxation time. The T-2 term of the resistivity is scaled with the specific-heat coefficient, based on the recent theory for the electron-electron scattering. The present results provide evidence that Ag5Pb2O6 is a low-carrier-density three-dimensional electron-gas-like system with enhanced electron-electron scatterings.

【 授权许可】

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