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Superconductivity in the two-dimensional t-J model.

S Sorella1, G B Martins, F Becca

  • 1Istituto Nazionale per la Fisica della Materia, and SISSA, I-34014 Trieste, Italy.

Physical Review Letters
|March 23, 2002
PubMed
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Pairing is a robust property in hole-doped antiferromagnetic insulators. While quantum fluctuations disrupt superconductivity in 1D systems, they do not suppress it in 2D.

Area of Science:

  • Condensed Matter Physics
  • Quantum Materials

Background:

  • Antiferromagnetic insulators are key materials in condensed matter physics.
  • Understanding electron pairing mechanisms is crucial for discovering new superconductors.

Purpose of the Study:

  • To investigate the robustness of pairing in hole-doped antiferromagnetic insulators.
  • To determine the impact of quantum fluctuations on superconductivity in various dimensions.

Main Methods:

  • Computational techniques, including variational wave functions and the Jastrow factor.
  • Numerical simulations, particularly quantum Monte Carlo methods.

Main Results:

  • Pairing is confirmed as a robust property in these materials.
  • In 1D and two-leg ladder systems, BCS-like wave functions accurately represent the ground state.

Related Experiment Videos

  • Strong quantum fluctuations destroy long-range superconducting order in 1D.
  • In 2D, quantum fluctuations are insufficient to suppress superconductivity.

    • Conclusions:

    • Superconductivity is a viable property in 2D hole-doped antiferromagnetic insulators.
    • The dimensionality significantly influences the effect of quantum fluctuations on superconducting order.