The abTEM code: transmission electron microscopy from first principles¶
abTEM provides a Python API for running simulations of (scanning) transmission electron microscopy images and diffraction patterns. It is written entirely in Python, which enables easy integration with first-principles codes and analysis tools accessible from Python, and allows for a simple and intuitive user interface. The computationally demanding parts are implemented using jit-compiled Numba code and high-performance libraries, maintaining speed while ensuring portability.
abTEM works with the Atomic Simulation Environment and the density functional theory code GPAW to provide an seamless environment for simulating images from first principles.
>>> from ase import read >>> from abtem.waves import PlaneWave >>> atoms = read('SrTiO.cif') >>> plane_wave = PlaneWave(sampling=0.01, energy=300e3) >>> exit_wave = plane_wave.multislice(atoms) >>> image_wave = exit_wave.apply_ctf(defocus=200, focal_spread=40) >>> image_wave.show()