The strange metal Hall effect connects quantum criticality and superconductivity in an iron-based superconductor

  title={The strange metal Hall effect connects quantum criticality and superconductivity in an iron-based superconductor},
  author={Ian M. Hayes and Nikola Maksimovic and Mun K. Chan and Gilbert N. Lopez and B. J. Ramshaw and Ross D. McDonald and James G. Analytis},
  journal={arXiv: Strongly Correlated Electrons},
Many unconventional superconductors exhibit a common set of anomalous charge transport properties that characterize them as `strange metals', which provides hope that there is single theory that describes them. However, model-independent connections between the strange metal and superconductivity have remained elusive. In this letter, we show that the Hall effect of the unconventional superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$ contains an anomalous contribution arising from the correlations… 

Strange Metallic Transport in the Antiferromagnetic Regime of Electron Doped Cuprates

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

Hall Anomaly, Quantum Oscillations and Possible Lifshitz Transitions in Kondo Insulator YbB12 : Evidence for Unconventional Charge Transport

In correlated electronic systems, strong interactions and the interplay between different degrees of freedom may give rise to anomalous charge transport properties, which can be tuned by exter-nal

Putative Hall response of the strange metal component in FeSe1−xSx

The authors show that the Hall response of the electron nematic FeSe${}_{1\ensuremath{-}x}$S${}_{x}$ comprises two metal components, one of which shows an anomalous 1/T temperature dependence and



Link between spin fluctuations and electron pairing in copper oxide superconductors

It is shown that a scattering rate that is linearly dependent on temperature—a key feature of the anomalous normal state properties of the copper oxides—is correlated with the electron pairing, and an envelope of such scattering surrounds the superconducting phase, surviving to zero temperature when superconductivity is suppressed by magnetic fields.

Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point

A model that can be tuned through a metallic quantum critical point is simulated and behavior consistent with “bad metal” phenomenology is observed, including a “nodal–antinodal dichotomy” reminiscent of that seen in several transition metal oxides.

Anomalous quantum criticality in the electron-doped cuprates

Measurements of the low-temperature normal-state thermopower of the electron-doped cuprate superconductor La2−xCexCuO4 (LCCO) are presented, and a quantum critical S/T versus ln(1/T) behavior over an unexpectedly wide doping range is observed, suggesting a link between the critical fluctuations and the superconductivity.

Quantum-critical fluctuations in 2D metals: strange metals and superconductivity in antiferromagnets and in cuprates

  • C. Varma
  • Physics
    Reports on progress in physics. Physical Society
  • 2016
The solution of this model in (2+1)D reveals that the critical fluctuations are determined by topological excitations, vortices and a variety of instantons, and not by renormalized spin-wave theories of the Landau-Ginzburg-Wilson type, adapted by Moriya, Hertz and others for quantum-criticality.

Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate

Measurements of the low-temperature normal-state magnetoresistance of the n-type cuprate system La2−xCexCuO4 find that it is characterized by a linear-in-field behavior, which follows a scaling relation with applied field and temperature.

Quantum Critical Quasiparticle Scattering within the Superconducting State of CeCoIn_{5}.

The fact that the quantum critical scattering of the unpaired electrons is much weaker than the average scattering of all electrons in the normal state reveals a k-space correlation between the strength of pairing and thestrength of scattering, pointing to a common mechanism, presumably antiferromagnetic fluctuations.

Scaling between magnetic field and temperature in the high-temperature superconductor BaFe2(As1-xPx)2

The linear change in resistance with temperature in high-temperature superconductors is an enduring mystery. And now, the resistance in a magnetic field shows similar scaling, suggesting that

Anomalous Criticality in the Electrical Resistivity of La2–xSrxCuO4

Measurements of the low-temperature in-plane resistivity of several highly doped La2–xSrxCuO4 single crystals in which the superconductivity had been stripped away by using high magnetic fields show that the resistivity is maximal at a critical doping level (pc) ∼ 0.19 at whichsuperconductivity is most robust.

Multi-band mass enhancement towards critical doping in a pnictide superconductor

Near critical doping, high-temperature superconductors exhibit multiple anomalies associated with enhanced electronic correlations and quantum criticality. Quasiparticle mass enhancement approaching

A tale of two metals: contrasting criticalities in the pnictides and hole-doped cuprates

It is argued that the opening of the normal state pseudogap in cuprates arises from a momentum-dependent breakdown of quasiparticle coherence that sets in at much higher doping levels but which is driven by the proximity to the Mott insulating state at half filling.