Speaker
Richard Dronskowski
德国亚琛工业大学教授
Date＆Time
2022.05.20（Fri）PM 15:00
Location
Zoom Meeting ID：950 680 6742 Password：2022
https://www.koushare.com/lives/room/813629
Reporter
Richard Dronskowski is Chair of Solid State and Quantum Chemistry at RWTH Aachen University in Germany, Former Director of Ab Initio Simulation Laboratory for Chemistry and Physics, Jülich Aachen Research Alliance in Germany. He was a Guest Professor (Quantum Theoretical Materials Chemistry) at the Center of Interdisciplinary Research of Tōhoku University in Japan. His many awards include the Otto Hahn Medal from the Max Planck Society, the Liebig Scholarship from German Chemical Industry Association, the Prize of Angewandte Chemie, the M. N. Saha Memorial Lecture by the Indian Association for the Cultivation of Science in Kolkata, the Innovation Award from RWTH Aachen University, and the Egon Wiberg Lecture by LMU Munich. He is on the editorial boards of journals such as Inorganics and the Journal of Physics Condensed Matter. He has more than 500 publications. His research areas include synthetic solid state chemistry, quantum chemistry, and crystal chemistry (neutron diffraction etc.).
Abstract
What makes atoms stick together in molecules and solids, exactly? To answer that, population analysis as imagined by Mulliken (1955) has held a prominent place in quantum chemistry for decades already. Likewise, periodic bonding indicators such Crystal Orbital Hamilton Population, COHP (1993) have been helpful, the latter carried out using local-basis codes. Such analysis has allowed to chemically understand three-dimensional Peierls distortions, spin polarization in itinerant magnets, and a lot more. While plane-wave packages such as VASP, ABINIT, Quantum ESPRESSO etc. offer computational advantages, they lack locality, so the aforementioned chemical concepts were unavailable. Nonetheless, all local bonding information can be analytically reconstructed by transferring plane-wave pseudopotential data to local auxiliary bases built from contracted Slater-type orbitals, as implemented in the LOBSTER (Local-Orbital Basis Suite Towards Electronic-Structure Reconstruction) code, freely available at www.cohp.de, and it also offers other tools like the density-of-energy, crystal-orbital bond index, as well as established quantum-chemical descriptors such as Mulliken or Löwdin charges directly from the wavefunction, not indirectly from the density. All that will be illustrated, using essentially non-mathematical reasoning, from a variety of recent chemical examples, including elemental solids, simple molecules, battery and “metavalently” bonded phase-change materials.
