Jump to main content
Jump to site search

Issue 25, 2016
Previous Article Next Article

Designing artificial two dimensional electron lattice on metal surface: a Kagome-like lattice as an example

Author affiliations

Abstract

Recently, a new kind of artificial two dimensional (2D) electron lattice on the nanoscale, i.e. molecular graphene, has drawn a lot of interest, where the metal surface electrons are transformed into a honeycomb lattice via absorbing a molecular lattice on the metal surface [Gomes et al., Nature, 2012, 438, 306; Wang et al., Phys. Rev. Lett., 2014, 113, 196803]. In this work, we theoretically demonstrate that this technique can be readily used to build other complex 2D electron lattices on a metal surface, which are of high interest in the field of condensed matter physics. The main challenge to build a complex 2D electron lattice is that this is a quantum antidot system, where the absorbed molecule normally exerts a repulsive potential on the surface electrons. Thus, there is no straightforward corresponding relation between the molecular lattice pattern and the desired 2D lattice of surface electrons. Here, we give an interesting example about the Kagome lattice, which has exotic correlated electronic states. We design a special molecular pattern and show that this molecular lattice can transform the surface electrons into a Kagome-like lattice. The numerical simulation is conducted using a Cu(111) surface and CO molecules. We first estimate the effective parameters of the Cu/CO system by fitting experimental data of the molecular graphene. Then, we calculate the corresponding energy bands and LDOS of the surface electrons in the presence of the proposed molecular lattice. Finally, we interpret the numerical results by the tight binding model of the Kagome lattice. We hope that our work can stimulate further theoretical and experimental interest in this novel artificial 2D electron lattice system.

Graphical abstract: Designing artificial two dimensional electron lattice on metal surface: a Kagome-like lattice as an example

Back to tab navigation

Publication details

The article was received on 20 Apr 2016, accepted on 25 May 2016 and first published on 26 May 2016


Article type: Paper
DOI: 10.1039/C6NR03223K
Citation: Nanoscale, 2016,8, 12747-12754
  •   Request permissions

    Designing artificial two dimensional electron lattice on metal surface: a Kagome-like lattice as an example

    S. Li, W. Qiu and J. Gao, Nanoscale, 2016, 8, 12747
    DOI: 10.1039/C6NR03223K

Search articles by author

Spotlight

Advertisements