High-field Behavior in the Electron Doped Superconducting Cuprate La<sub>2-x</sub>Ce<sub>x</sub>CuO<sub>4</sub>
ORAL
Abstract
We present recent results on the magnetoresistance and Hall effect of La2-xCexCuO4 (LCCO) in applied fields up to 65 T in the vicinity of the proposed quantum critical point at xc = 0.141. Additionally, at xc, the T -> 0 K Hall coefficient changes sign in low magnetic fields (B < 14 T) from negative below xc to positive for higher dopings. It was recently reported in Nd2-xCexCuO4 single crystals2 that the doping where the sign change occurs shifts to lower doping at higher fields. We revisit this trend in LCCO thin films and discuss the possible scenarios.
1T. Sarkar, et al., Phys. Rev. B 96, 155449 (2017).
2T. Helm, et al., Phys. Rev. B 92, 094501 (2015).
1T. Sarkar, et al., Phys. Rev. B 96, 155449 (2017).
2T. Helm, et al., Phys. Rev. B 92, 094501 (2015).
*This research was supported in part by the NSF under DMR-1410665, DMR-1708334, and by the National High Magnetic Field Laboratory, which is supported by the NSF Cooperative Agreement No. DMR-1157490 and the State of Florida.
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Presenters
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Joshua Higgins
- Univ of Maryland-College Park
- Center for Nanophysics & Advanced Materials, Univ of Maryland-College Park
- University of Maryland