Effect of Next-Nearest-Neighbor (NNN) Hopping and Exchange Interactions on High-Tc Superconductivity

Authors

  • K Roy Department of Physics, University of Kalyani, Kalyani, West Bengal 741235, India
  • N K Ghosh Department of Physics, University of Kalyani, Kalyani, West Bengal 741235, India

DOI:

https://doi.org/10.48165/

Keywords:

High-Tc superconductivity, t - t'- J - J' model, Hole pairing

Abstract

To investigate the effect of next-nearest-neighbor (NNN) hopping (t') and exchange  interactions (J') on pairing mode (s- or d-wave) and hole-binding, the t-t'-J-J' model  has been considered within an 8-site square cluster (tilted). Using the Lanczos exact  diagonalization method, the dominance of s-wave is identified. The formation of  two-hole pair is observed at J'/t > 0.5. However, appearance of superconducting  condensation is absent in the model.  

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Published

2020-06-05

Issue

Vol. 39 No. 1 (2020): Bulletin of Pure and Applied Sciences Physics (Jan-Jul) 2020

Section

Articles

How to Cite

Effect of Next-Nearest-Neighbor (NNN) Hopping and Exchange Interactions on High-Tc Superconductivity . (2020). Bulletin of Pure and Applied Sciences – Physics, 39(1), 66–70. https://doi.org/10.48165/