TOMBO is an efficient all-electron mixed basis (first-principles calculation) code, which uses both plane waves and atomic orbitals as a basis set. It can treat not only periodic systems (supercell systems and crystals) but also isolated systems (atoms, clusters, and molecules). In addition to usual LDA calculations, one-shot GW and several other calculations are possible.

Anyone who publishes any result using TOMBO has to cite the following reference:

Shota Ono, Yoshifumi Noguchi, Ryoji Sahara, Yoshiyuki Kawazoe, and Kaoru Ohno,
"TOMBO: All-electron mixed-basis approach to condensed matter physics", Computer Physics Communications 189, 20-30 (2015). DOI: 10.1016/j.cpc.2014.11.012
(Elsevier Comp. Phys. Comm. Website)

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Manual for LDA & GW Calculations Download

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