{"doi":"10.1103/PhysRevB.87.195208","article_number":"195208","file":[{"file_name":"PhysRevB.87.195208.pdf","date_updated":"2020-08-30T14:53:40Z","file_size":791961,"file_id":"18478","content_type":"application/pdf","access_level":"open_access","relation":"main_file","title":"Optical response of stoichiometric and congruent lithium niobate from first-principles calculations","date_created":"2020-08-27T22:06:46Z","description":"© 2013 American Physical Society","creator":"schindlm"}],"isi":"1","ddc":["530"],"issue":"19","publication_status":"published","file_date_updated":"2020-08-30T14:53:40Z","date_created":"2019-09-30T14:11:18Z","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"has_accepted_license":"1","quality_controlled":"1","oa":"1","abstract":[{"text":"The frequency-dependent dielectric function and the second-order polarizability tensor of ferroelectric LiNbO3 are calculated from first principles. The calculations are based on the electronic structure obtained from density-functional theory. The subsequent application of the GW approximation to account for quasiparticle effects and the solution of the Bethe-Salpeter equation for the stoichiometric material yield a dielectric function that slightly overestimates the absorption onset and the oscillator strength in comparison with experimental measurements. Calculations at the level of the independent-particle approximation indicate that these deficiencies are, at least, partially related to the neglect of intrinsic defects typical for the congruent material. The second-order polarizability calculated within the independent-particle approximation predicts strong nonlinear coefficients for photon energies above 1.5 eV. The comparison with measured data suggests that the inclusion of self-energy effects in the nonlinear optical response leads to a better agreement with experiments. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular, for the 21 and 31 tensor components, further improving the agreement between experiments and theory.","lang":"eng"}],"article_type":"original","publication":"Physical Review B","date_updated":"2022-01-06T06:51:38Z","type":"journal_article","language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1550-235X"],"issn":["1098-0121"]},"department":[{"_id":"295"},{"_id":"296"}],"_id":"13525","title":"Optical response of stoichiometric and congruent lithium niobate from first-principles calculations","volume":87,"citation":{"bibtex":"@article{Riefer_Sanna_Schindlmayr_Schmidt_2013, title={Optical response of stoichiometric and congruent lithium niobate from first-principles calculations}, volume={87}, DOI={<a href=\"https://doi.org/10.1103/PhysRevB.87.195208\">10.1103/PhysRevB.87.195208</a>}, number={19195208}, journal={Physical Review B}, publisher={American Physical Society}, author={Riefer, Arthur and Sanna, Simone and Schindlmayr, Arno and Schmidt, Wolf Gero}, year={2013} }","short":"A. Riefer, S. Sanna, A. Schindlmayr, W.G. Schmidt, Physical Review B 87 (2013).","chicago":"Riefer, Arthur, Simone Sanna, Arno Schindlmayr, and Wolf Gero Schmidt. “Optical Response of Stoichiometric and Congruent Lithium Niobate from First-Principles Calculations.” <i>Physical Review B</i> 87, no. 19 (2013). <a href=\"https://doi.org/10.1103/PhysRevB.87.195208\">https://doi.org/10.1103/PhysRevB.87.195208</a>.","mla":"Riefer, Arthur, et al. “Optical Response of Stoichiometric and Congruent Lithium Niobate from First-Principles Calculations.” <i>Physical Review B</i>, vol. 87, no. 19, 195208, American Physical Society, 2013, doi:<a href=\"https://doi.org/10.1103/PhysRevB.87.195208\">10.1103/PhysRevB.87.195208</a>.","ama":"Riefer A, Sanna S, Schindlmayr A, Schmidt WG. Optical response of stoichiometric and congruent lithium niobate from first-principles calculations. <i>Physical Review B</i>. 2013;87(19). doi:<a href=\"https://doi.org/10.1103/PhysRevB.87.195208\">10.1103/PhysRevB.87.195208</a>","ieee":"A. Riefer, S. Sanna, A. Schindlmayr, and W. G. Schmidt, “Optical response of stoichiometric and congruent lithium niobate from first-principles calculations,” <i>Physical Review B</i>, vol. 87, no. 19, 2013.","apa":"Riefer, A., Sanna, S., Schindlmayr, A., &#38; Schmidt, W. G. (2013). Optical response of stoichiometric and congruent lithium niobate from first-principles calculations. <i>Physical Review B</i>, <i>87</i>(19). <a href=\"https://doi.org/10.1103/PhysRevB.87.195208\">https://doi.org/10.1103/PhysRevB.87.195208</a>"},"external_id":{"isi":["000319391000002"]},"user_id":"458","intvolume":"        87","status":"public","year":"2013","author":[{"first_name":"Arthur","last_name":"Riefer","full_name":"Riefer, Arthur"},{"full_name":"Sanna, Simone","last_name":"Sanna","first_name":"Simone"},{"full_name":"Schindlmayr, Arno","id":"458","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","first_name":"Arno"},{"last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero","orcid":"0000-0002-2717-5076","first_name":"Wolf Gero"}],"publisher":"American Physical Society"}