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Related Concept Videos

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Related Experiment Video

Updated: May 17, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Conductivity close to antiferromagnetic criticality.

S V Syzranov1, J Schmalian

  • 1Institute for Theoretical Condensed Matter Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.

Physical Review Letters
|October 30, 2012
PubMed
Summary

This study investigates conductivity in disordered metals near antiferromagnetic instability. The interaction correction to conductivity is primarily influenced by

Area of Science:

  • Condensed Matter Physics
  • Quantum Materials

Background:

  • Disordered metals exhibit complex electronic properties influenced by magnetic fluctuations.
  • Antiferromagnetic instability can significantly alter conductivity in metallic systems.
  • Understanding electron-electron interactions is crucial for predicting material behavior.

Purpose of the Study:

  • To calculate the interaction correction to conductivity in a 3D disordered metal.
  • To analyze the impact of proximity to antiferromagnetic instability on conductivity.
  • To investigate the frequency and temperature dependence of conductivity corrections.

Main Methods:

  • Utilized the spin-fermion model to describe electron interactions.
  • Employed diagrammatic techniques to calculate conductivity corrections.

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Last Updated: May 17, 2026

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  • Focused on weak interactions and disorder-dominated scattering.

    • Main Results:

    • Interaction correction to conductivity, δσ(ω,T), is dominated by 'hot spots' on the Fermi surface.
    • At the critical point, δσ is proportional to [max(ω,T)](3/2).
    • At high frequencies, conductivity becomes temperature-independent; δσ ~ (τ⁻¹ - iω)⁻².

    Conclusions:

    • Electron-electron interactions near antiferromagnetic instability significantly modify conductivity.
    • Critical behavior is localized near specific regions of the Fermi surface.
    • The derived frequency dependence provides a signature for experimental verification.