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10. V. J. Härkönen, Breakdown of the Born-Oppenheimer approximation in LiH and LiD, arXiv preprint arXiv:2312.07411 (2023).
9. V. J. Härkönen, Breakdown of the Born-Oppenheimer approximation in solid hydrogen and hydrogen-rich solids, arXiv:2311.06114 (2023).
8. V. J. Härkönen, Exact factorization of the many-body Green’s function theory of electrons and nuclei, Physical Review B 106 (20), 205137 (2022).
7. V. J. Härkönen, I. A. Gonoskov, On the diagonalization of quadratic Hamiltonians, Journal of Physics A: Mathematical and Theoretical 55 (1), 015306 (2021).
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4. V. J. Härkönen, Elastic constants and thermodynamical quantities for crystal lattices from many-body perturbation theory, arXiv:1603.06376 (2016).
3. V. J. Härkönen, A. J. Karttunen, Ab initio studies on the lattice thermal conductivity of silicon clathrate frameworks II and VIII, Physical Review B 93 (2), 024307 (2016).
2. V. J. Härkönen, A. J. Karttunen, Ab initio lattice dynamical studies of silicon clathrate frameworks and their negative thermal expansion, Physical Review B 89 (2), 024305 (2014).
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