Monolayer NbF$_4$: a $4d^1$-analogue of cuprates

Yang Yang; Wan-Sheng Wang; C. S. Ting; Qiang-Hua Wang

Monolayer NbF$_4$: a $4d^1$-analogue of cuprates

Superconductivity 2019-12-19 v1 Strongly Correlated Electrons

Authors: Yang Yang , Wan-Sheng Wang , C. S. Ting , Qiang-Hua Wang

Abstract

The electronic structure and possible electronic orders in monolayer NbF $_4$ are investigated by density functional theory and functional renormalization group. Because of the niobium-centered octahedra, the energy band near the Fermi level is found to derive from the $4d_{xy}$ orbital, well separated from the other bands. Local Coulomb interaction drives the undoped system into an antiferromagnetic insulator. Upon suitable electron/hole doping, the system is found to develop $d_{x^2-y^2}$ -wave superconductivity with sizable transition temperature. Therefore, the monolayer NbF $_4$ may be an exciting $4d^1$ analogue of cuprates, providing a new two-dimensional platform for high- $T_c$ superconductivity.

Keywords

monolayer nbf4 cuprate analogue density functional theory functional renormalization group antiferromagnetic insulator d-wave superconductivity high-tc superconductivity

Cite

@article{arxiv.1912.08383,
  title  = {Monolayer NbF$_4$: a $4d^1$-analogue of cuprates},
  author = {Yang Yang and Wan-Sheng Wang and C. S. Ting and Qiang-Hua Wang},
  journal= {arXiv preprint arXiv:1912.08383},
  year   = {2019}
}

Comments

5 pages, 6 color figures

Monolayer NbF$_4$: a $4d^1$-analogue of cuprates

Abstract

Keywords

Cite

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