NANOTIMES

Nanotimes is a French company specialized in nanoscale simulation software solutions.Provide simulation software that meets state-of-the-art requirements for STM/AFM image simulation. The application fields are many:

  • Graphene-based devices
  • Atomic scale effects in Nanoelectronics
  • Carbon Nanotubes based Nanoelectronics and Nanochemistry,
  • Nanofabrication tools & nanoscale integration
  • Nanostructured and Nanoparticle based materials

Serving both labs and companies, Nanotimes has first oriented its simulation software technology towards STM/AFM experimentalists very specific needs of nanoscale image interpretation. It also offers theoreticians great features for their specific needs,  as the Green code:

  • Can deal either with standard unit cells (diagonalization) or with complex structures involving blocks of different dimensionality via Green’s functions (e.g. the STM).
  • Uses either a semi-empirical Hamiltonian (EHT or Tight Binding) or the abinitio DFT based SIESTA framework  (to be implemented soon).
  • Offers a large amount of tools to calculate/analyze/view the electronic structure: PDOS, COOPs, charge densities, projections onto AOs, MOs, etc.
  • Deals with transport properties in out of equilibrium conditions: elastic transmission in nanodevices (e.g. STM, nanotubes, graphene, etc.).
  • Manages the calculation of vibrational modes/phonons.
  • Deals with inelastic currents: electron-vibrational mode coupling, IETS.
  • and last but not least, has incorporated spin-orbit (LS).

The classic STM simulation software package designed for STM experimentalists Nt_STM calculates the electrical current through any given nanometrical system (microscope tip + sample + surface) and reproduces the results of a real STM. It gives current or topographic mode results as well as I(v) or I(z) curves, just like in your experiment.

 

Nanotimes Nt_STM calculates all interactions between the atoms and provides results accuracy and similarity with the experiments’ results.
The simulation engine available today is based on Dr. Jorge Iribas Cerda’s ”Green”code. More engines are to be added soon.The nanometrical system is represented by the Extended Hückel Theory (EHT). More precise theoretical chemistry programs can be integrated to Nt_STM for specific simulations.
Nanotimes

Simply draw your system, design your surface and tip, adjust your EHT quantum parameters, launch the simulation and compare the simulated results with those of your STM !!.