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Related Experiment Videos

Dynamical layer decoupling in a stripe-ordered high-T(c) superconductor.

E Berg1, E Fradkin, E-A Kim

  • 1Department of Physics, Stanford University, Stanford, California 94305-4060, USA.

Physical Review Letters
|October 13, 2007
PubMed
Summary
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In stripe-ordered electronic systems, superconductivity can arise with a unique wave vector. This leads to vanishing Josephson coupling in specific crystals like La(2-x)Ba(x)CuO(4), explaining observed layer decoupling.

Area of Science:

  • Condensed matter physics
  • Materials science
  • Superconductivity

Background:

  • Strongly correlated two-dimensional electronic systems exhibit complex ordered states.
  • Stripe order and superconductivity are emergent phenomena in these systems.
  • Layered cuprate materials like La(2-x)Ba(x)CuO(4) display intricate electronic behaviors.

Purpose of the Study:

  • To investigate the relationship between stripe order and superconductivity in two-dimensional electronic systems.
  • To explain the vanishing Josephson coupling in specific layered structures.
  • To elucidate the cause of dynamical decoupling observed in transport measurements.

Main Methods:

  • Theoretical analysis of superconducting condensate wave vectors.
  • Investigation of Josephson coupling in layered materials with specific crystal structures.

Related Experiment Videos

  • Correlation of theoretical predictions with experimental transport measurements.

    • Main Results:

    • Superconducting condensate can form at a nonzero wave vector, doubling the charge order period.
    • Josephson coupling between adjacent planes vanishes identically in systems with specific structures (e.g., La(2-x)Ba(x)CuO(4)).
    • This vanishing coupling is proposed as the cause for dynamical decoupling at x = 1/8.

    Conclusions:

    • The spatial modulation of the superconducting condensate is intrinsically linked to the stripe order.
    • Vanishing Josephson coupling provides a mechanism for the observed layer decoupling in certain cuprates.
    • This finding offers a new perspective on the interplay between different electronic orders in layered materials.