Hole-Binding in Nx2 Dice-Ladder

ORAL

Abstract

Recent theoretical work has showed that the geometrical transition from 2D planes to quasi-1D ladders does not alter the basic topological properties in dice lattices. Additionally, interaction studies via DMRG and Lanczos for Nx2 ladders has revealed the existence of a ferrimagnetic phase in these systems at half filling [1]. In this work, we show the presence of negative binding energy for a pair of holes in this ferrimagnetic region of the Nx2 ladder. We will be discussing the dominant pair-pair correlation channels and compare with the charge and spin correlation channels. We will also discuss the structure of the one-hole and two-hole ground states in the Nx2 ladder system. Our efforts pave the way for exploring the presence of superconducting channels in such topological systems, where the combined effect of topology and correlation unveils rich physical aspects.

[1] R. Soni, N. Kaushal, S. Okamoto, and E. Dagotto, Phys. Rev. B 102, 045105 (2020).
[2] S. R. White, and D. J. Scalapino, Phys. Rev. B 55 6504 (1997).
[3] N. D. Patel, A. Nocera, G. Alvarez, A. Moreo, and E. Dagotto, Phys. Rev. B 96 024520 (2017).
[4] F. Wang and Y. Ran, Phys. Rev. B. 84, 241103 (2011).

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Presenters

  • Rahul Soni

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee

Authors

  • Rahul Soni

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee

  • Gonzalo Alvarez

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Computational Sciences and Engineering Division, Oak Ridge National Laboratory
    • Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
    • Computational Sciences & Engineering Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
    • Computational Sciences and Engineering Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

  • Elbio Dagotto

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennesse at Knoxville
    • Physics, University of Tennessee
    • University of Tennessee and ORNL
    • Department of Physics and Astronomy, University of Tennessee
    • Oak Ridge National Lab