Tailoring plasmon excitations in armchair nanoribbons

A Iurov, L Zhemchuzhna, G Gumbs, D Huang… - Scientific reports, 2021 - nature.com
We have calculated and investigated the electronic states, dynamical polarization function
and the plasmon excitations for α-T 3 nanoribbons with armchair-edge termination. The …

Signatures of many-body localization of quasiparticles in a flat band superconductor

K Swaminathan, P Tadros, S Peotta - Physical Review Research, 2023 - APS
We construct a class of exact eigenstates of the Hamiltonian obtained by projecting the
Hubbard interaction term onto the flat band subspace of a generic lattice model. These exact …

Superfluid density and collective modes of fermion superfluid in dice lattice

YR Wu, XF Zhang, CF Liu, WM Liu, YC Zhang - Scientific Reports, 2021 - nature.com
The superfluid properties of attractive Hubbard model in dice lattice are investigated. It is
found that three superfluid order parameters increase as the interaction increases. When the …

Infinite bound states and 1/n energy spectrum induced by a coulomb-like potential of type iii in a flat band system

YC Zhang - Physica Scripta, 2022 - iopscience.iop.org
In this work, we investigate the bound states in a one-dimensional spin-1 flat band system
with a Coulomb-like potential of type III, which has a unique non-vanishing matrix element in …

Bound states in the continuum (BIC) protected by self-sustained potential barriers in a flat band system

YC Zhang - Scientific Reports, 2022 - nature.com
In this work, we investigate the bound states in the continuum (BIC) of a one-dimensional
spin-1 flat band system. It is found that, when the potential is sufficiently strong, there exists …

Critical regions in a one-dimensional flat band lattice with a quasi-periodic potential

YC Zhang - Scientific Reports, 2024 - nature.com
In our previous work, the concept of critical region in a generalized Aubry–André model
(Ganeshan–Pixley–Das Sarma's model) has been established. In this work, we find that the …

Infinite bound states and hydrogen atom-like energy spectrum induced by a flat band

YC Zhang, GB Zhu - Journal of Physics B: Atomic, Molecular and …, 2022 - iopscience.iop.org
In this work, we investigate the bound-state problem in a one-dimensional spin-1 Dirac
Hamiltonian with a flat band. It is found that the flat band has significant effects on the bound …

Wave function collapses and 1/n energy spectrum induced by a Coulomb potential in a one-dimensional flat band system

YC Zhang - Chinese Physics B, 2022 - iopscience.iop.org
We investigate the bound state problem in a one-dimensional flat band system with a
Coulomb potential. It is found that, in the presence of a Coulomb potential of type I (with …

Critical region in a one-dimensional flat band lattice with a quasi-periodic potential

Y Zhang - 2024 - researchsquare.com
In our previous work, the concept of critical region in a generalized Aubry-Andr'{e} model
(Ganeshan-Pixley-Das Sarma's model) has been set up. In this work, we find that the critical …

Proposed realization of critical regions in a one-dimensional flat band lattice with a quasi-periodic potential

YC Zhang - arXiv preprint arXiv:2205.12337, 2022 - arxiv.org
In the previous work, the concept of critical region in a generalized Aubry-Andr\'{e} model
(Ganeshan-Pixley-Das Sarma's model) has been set up. In this work we propose that the …