<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> <dc:creator>Tal, Alexey</dc:creator> <dc:creator>Bischoff, Thomas</dc:creator> <dc:creator>Pasquarello, Alfredo</dc:creator> <dc:date>2024-02-14</dc:date> <dc:description>We demonstrate the importance of addressing the šŖ vertex and thus going beyond the GW approximation for achieving the energy levels of liquid water in many- body perturbation theory. In particular, we consider an effective vertex function in both the polarizability and the self-energy, which does not produce any computational overhead compared with the GW approximation. We yield the band gap, the ionization potential, and the electron affinity in good agreement with experiment and with a hybrid functional description. The achieved electronic structure and dielectric screening further lead to a good description of the optical absorption spectrum, as obtained through the solution of the BetheāSalpeter equation. In particular, the experimental peak position of the exciton is accurately reproduced.</dc:description> <dc:identifier>https://archive.materialscloud.org/record/2024.28</dc:identifier> <dc:identifier>doi:10.24435/materialscloud:n5-7n</dc:identifier> <dc:identifier>mcid:2024.28</dc:identifier> <dc:identifier>oai:materialscloud.org:2081</dc:identifier> <dc:language>en</dc:language> <dc:publisher>Materials Cloud</dc:publisher> <dc:rights>info:eu-repo/semantics/openAccess</dc:rights> <dc:rights>Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights> <dc:subject>water</dc:subject> <dc:subject>GW</dc:subject> <dc:subject>Vertex</dc:subject> <dc:subject>many-body perturbation theory</dc:subject> <dc:subject>electronic structure</dc:subject> <dc:subject>ionization potential</dc:subject> <dc:title>Absolute energy levels of liquid water from many-body perturbation theory with effective vertex corrections</dc:title> <dc:type>Dataset</dc:type> </oai_dc:dc>