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Published on: May 27, 2020
Gaussian-Based Coupled-Cluster Theory for the Ground-State and Band Structure of Solids
James McClain1, Qiming Sun2, Garnet Kin-Lic Chan2
1Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States.
Abstract:
We present the results of Gaussian-based ground-state and excited-state equation-of-motion coupled-cluster theory with single and double excitations for three-dimensional solids. We focus on diamond and silicon, which are paradigmatic covalent semiconductors. In addition to ground-state properties (the lattice constant, bulk modulus, and cohesive energy), we compute the quasiparticle band structure and band gap. We sample the Brillouin zone with up to 64 k-points using norm-conserving pseudopotentials and polarized double- and triple-ζ basis sets, leading to canonical coupled-cluster calculations with as many as 256 electrons in 2176 orbitals.
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