Results 51 to 60 of about 198,178 (161)

Tight-Binding Models in a Quasiperiodic Optical Lattice

Acta Physica Polonica A, 2014
This paper describes how one can use four standing wave laser fields to realize a two dimensional optical quasicrystal with eight-fold symmetry, closely related to the well-known octagonal or Ammann-Beenker tiling quasicrystal. We describe the structure and its properties, and the effective tight-binding model for atoms in this optical quasicrystal ...
Jagannathan, Anuradha, Duneau, Michel
openaire   +2 more sources

Bloch oscillation with a diatomic tight-binding model on quantum computers

Physical Review Research
We aim to explore a more efficient way to simulate few-body dynamics on quantum computers. Instead of mapping the second quantization of the system Hamiltonian to qubit Pauli gate representation via the Jordan-Wigner transform, we propose to use the few ...
Peng Guo, Jaime Park, Frank X. Lee
doaj   +1 more source

Band gap engineering in finite elongated graphene nanoribbon heterojunctions: Tight-binding model

AIP Advances, 2015
A simple model based on the divide and conquer rule and tight-binding (TB) approximation is employed for studying the role of finite size effect on the electronic properties of elongated graphene nanoribbon (GNR) heterojunctions.
Benjamin O. Tayo
doaj   +1 more source

Bridging the small and large in twisted transition metal dichalcogenide homobilayers: A tight binding model capturing orbital interference and topology across a wide range of twist angles

Physical Review Research
Many of the important phases observed in twisted transition metal dichalcogenide homobilayers are driven by short-range interactions, which should be captured by a local tight binding description since no Wannier obstruction exists for these systems. Yet,
Valentin Crépel, Andrew Millis
doaj   +1 more source

Klein Tunneling in β₁₂ Borophene

Nanomaterials
Motivated by the recent observation of Klein tunneling in 8-Pmmn borophene, we delve into the phenomenon in β12 borophene by employing tight-binding approximation theory to establish a theoretical mode.
Jinhao Lai, Lekang Wang, Fu Li, Hongbin Zhang, Qingtian Zhang   +4 more
doaj   +1 more source

Symmetry, Maximally Localized Wannier States, and a Low-Energy Model for Twisted Bilayer Graphene Narrow Bands

Physical Review X, 2018
We build symmetry-adapted maximally localized Wannier states and construct the low-energy tight-binding model for the four narrow bands of twisted bilayer graphene. We do so when the twist angle is commensurate near the “magic” value and the narrow bands
Jian Kang, Oskar Vafek
doaj   +1 more source

Data-driven approximations of topological insulator systems

APL Machine Learning
A data-driven approach to calculating tight-binding models for discrete coupled-mode systems is presented. In particular, spectral and topological data are used to build an appropriate discrete model that accurately replicates these properties. This work
Justin T. Cole, Michael J. Nameika
doaj   +1 more source

STRUCTURE OF SMALL CLUSTERS OF TITAN TiN ( N=2÷15 ) [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013
The study was performed of the structure of free clusters of titanium TiN ( N=2÷15 ) means of molecular dynamics using a many-particle cooperation in the tight-binding model.
N.A. Pankin
doaj  

Nonsmooth and level-resolved dynamics illustrated with a periodically driven tight-binding model

ScienceOpen Research, 2015
We point out that in the first-order time-dependent perturbation theory, the transition probability may behave nonsmoothly in time and have kinks periodically.
Masudul Haque, jiang min zhang
doaj   +1 more source

Remarks on the tight-binding model of graphene

New Journal of Physics, 2009
15 pages, 4 ...
Bena, Cristina, Montambaux, Gilles
openaire   +2 more sources