Hidden strange metallic state in underdoped electron-doped cuprates
| Autor: | Mun Chan, Tarapada Sarkar, Richard L. Greene, P. R. Mandal, Nicholas R. Poniatowski, Joshua Higgins |
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| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Magnetoresistance Fermi surface 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electrical resistivity and conductivity Hall effect Condensed Matter::Superconductivity Quantum critical point 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Cuprate 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.103.224501 |
| Popis: | The low-temperature linear-in-T resistivity of ``strange metals,'' such as the metallic state of the cuprate high-temperature superconductors, has long been thought to be associated with a quantum critical point. However, recent transport studies of the cuprates have found this behavior persists over a finite range of overdoping. In this work, we report magnetoresistance and Hall effect results for electron-doped films of the cuprate superconductor ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Ce}}_{x}{\mathrm{CuO}}_{4}$ (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) at $x=0.14$, 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 \ensuremath{\sim}40 K down to 0.7 K. The magnitude of the linear coefficient scales with Tc and doping, as found previously [K. Jin, Nature(London) 476, 73 (2011), T. Sarkar, Sci. Adv. 5, eaav6753 (2019)] for dopings above the FSR. This striking observation suggests that the strange metal is not confined to a single ``critical point'' in the phase diagram, but rather is a robust universal feature of the metallic ground state of the cuprates. |
| Databáze: | OpenAIRE |
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