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Giraldo-Gallo P, Galvis JA, Stegen Z, Modic KA, Balakirev FF, Betts JB, Lian X, Moir C, Riggs SC, Wu J, Bollinger AT, He X, Božović I, Ramshaw BJ, McDonald RD, Boebinger GS, Shekhter A. Scale-invariant magnetoresistance in a cuprate superconductor. Science 2018; 361:479-481. [PMID: 30072535 DOI: 10.1126/science.aan3178] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 05/31/2018] [Indexed: 11/02/2022]
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-x Sr x CuO4 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.
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Affiliation(s)
- P Giraldo-Gallo
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Department of Physics, Universidad de Los Andes, Bogotá 111711, Colombia
| | - J A Galvis
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Departamento de Ciencias Naturales, Facultad de Ingeniería y Ciencias Básicas, Universidad Central, Bogotá 110311, Colombia
| | - Z Stegen
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Department of Physics, Florida State University, Tallahassee, FL 32310, USA
| | - K A Modic
- Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany
| | - F F Balakirev
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - J B Betts
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - X Lian
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Department of Physics, Florida State University, Tallahassee, FL 32310, USA
| | - C Moir
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Department of Physics, Florida State University, Tallahassee, FL 32310, USA
| | - S C Riggs
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA
| | - J Wu
- Brookhaven National Laboratory (BNL), Upton, NY 11973, USA
| | - A T Bollinger
- Brookhaven National Laboratory (BNL), Upton, NY 11973, USA
| | - X He
- Brookhaven National Laboratory (BNL), Upton, NY 11973, USA.,Applied Physics Department, Yale University, New Haven, CT 06520, USA
| | - I Božović
- Brookhaven National Laboratory (BNL), Upton, NY 11973, USA.,Applied Physics Department, Yale University, New Haven, CT 06520, USA
| | - B J Ramshaw
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA.,Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853, USA
| | - R D McDonald
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - G S Boebinger
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.,Department of Physics, Florida State University, Tallahassee, FL 32310, USA
| | - A Shekhter
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL 32310, USA.
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Riggs SC, McDonald RD, Kemper JB, Stegen Z, Boebinger GS, Balakirev FF, Kohama Y, Migliori A, Chen H, Liu RH, Chen XH. Doping dependent nonlinear Hall effect in SmFeAsO(1-x)F(x). J Phys Condens Matter 2009; 21:412201. [PMID: 21693981 DOI: 10.1088/0953-8984/21/41/412201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the Hall resistivity, ρ(xy), of polycrystalline SmFeAsO(1-x)F(x) for four different fluorine concentrations from the onset of superconductivity through the collapse of the structural phase transition. For the two more highly doped samples, ρ(xy) is linear in magnetic field up to 50 T with only weak temperature dependence, reminiscent of a simple Fermi liquid. For the lightly doped samples with x<0.15, we find a low temperature regime characterized as ρ(xy)(H) being both nonlinear in magnetic field and strongly temperature-dependent even though the Hall angle is small. The onset temperature for this nonlinear regime is in the vicinity of the structural phase (SPT)/magnetic ordering (MO) transitions. The temperature dependence of the Hall resistivity is consistent with a thermal activation of carriers across an energy gap. The evolution of the energy gap with doping is reported.
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Affiliation(s)
- Scott C Riggs
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
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