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Journal Article

Scale-invariant magnetoresistance in a cuprate superconductor

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Modic,  K. A.
Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Giraldo-Gallo, P., Galvis, J. A., Stegen, Z., Modic, K. A., Balakirev, F. F., Betts, J. B., et al. (2018). Scale-invariant magnetoresistance in a cuprate superconductor. Science, 361(6401), 479-481. doi:10.1126/science.aan3178.


Cite as: https://hdl.handle.net/21.11116/0000-0001-EEDC-C
Abstract
The anomalous metallic state in the high-temperature superconducting cuprates is masked by superconductivity near a quantum critical point. Applying high magnetic fields to suppress superconductivity has enabled detailed studies of the normal state, yet the direct effect of strong magnetic fields on the metallic state is poorly understood. We report the high-field magnetoresistance of thin-film La2-xSrxCuO4 cuprate in the vicinity of the critical doping, 0.161 <= p <= 0.190. We find that the metallic state exposed by suppressing superconductivity is characterized by magnetoresistance that is linear in magnetic fields up to 80 tesla. The magnitude of the linear-in-field resistivity mirrors the magnitude and doping evolution of the well-known linear-in-temperature resistivity that has been associated with quantum criticality in high-temperature superconductors.