论文标题
电子掺杂酸酯的抗铁磁性状态中的奇怪金属运输
Strange Metallic Transport in the Antiferromagnetic Regime of Electron Doped Cuprates
论文作者
论文摘要
我们报告了高温超导体la $ _ {2-x} $ ce $ _x $ _x $ cuo $ _4 $（lcco）的磁性和霍尔效应结果电阻率在低温下表现出众所周知的上流。我们的新结果表明，在高磁场上消除了这种电阻率上升，并且电阻率从$ \ sim $ 40 k降至0.7 k。如先前发现的FSR上方的掺杂剂，用TC和掺杂的线性系数尺度的幅度[1,2]。此外，正常的国厅系数在低于50K的温度下具有非常规场的依赖性。该异常运输数据对理论提出了新的挑战，并表明抗铁磁性状态也存在奇怪的金属法线状态。
We report magnetoresistance and Hall Effect results for electron-doped films of the high-temperature superconductor La$_{2-x}$Ce$_x$CuO$_4$ (LCCO) for temperatures from 0.7 to 45 K and magnetic fields up to 65 T. For x = 0.12 and 0.13, just below the Fermi surface reconstruction (FSR), the normal state in-plane resistivity exhibits a well-known upturn at low temperature. Our new results show that this resistivity upturn is eliminated at high magnetic field and the resistivity becomes linear-in-temperature from $\sim$ 40 K down to 0.7 K. The magnitude of the linear coefficient scales with Tc and doping, as found previously [1,2] for dopings above the FSR. In addition, the normal state Hall coefficient has an unconventional field dependence for temperatures below 50K. This anomalous transport data presents a new challenge to theory and suggests that the strange metal normal state is also present in the antiferromagnetic regime.
