Strange Metallic Transport in the Antiferromagnetic Regime of Electron Doped Cuprates
T Sarkar, NR Poniatowski, JS Higgins… - arXiv preprint arXiv …, 2020 - arxiv.org
arXiv preprint arXiv:2007.12765, 2020•arxiv.org
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 …
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 …
We report magnetoresistance and Hall Effect results for electron-doped films of the high-temperature superconductor LaCeCuO (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 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.
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