Maria Hellgren

Researcher CNRS

Contact

maria.hellgren(at)sorbonne-universite.fr

Research interests

• Many-body physics
• Strongly correlated systems from first principles
• Electron-phonon coupling
• Fundamentals of (time-dependent) density functional theory

Selected publications

Hellgren M, Baima J, Acheche A, Exciton Peierls mechanism and universal many-body gaps in carbon nanotubes, PHYSICAL REVIEW B 98, 201103(R) (2018)

Hellgren M, Colonna N, de Gironcoli S, Beyond the random phase approximation with a local exchange vertex, PHYSICAL REVIEW B 98, 045117 (2018)

Hellgren M., Baima J., Bianco R., Calandra M., Mauri F., and Wirtz L. Critical Role of the Exchange Interaction for the Electronic Structure and Charge-Density-Wave Formation in TiSe2, PHYSICAL REVIEW LETTERS 119, 176401 (2017)

Caruso F, Rohr D, Hellgren M, Ren X, Rinke P, Rubio A, and Scheffler M, Bond Breaking and Bond Formation: How Electron Correlation is Captured in Many-Body Perturbation Theory and Density-Functional Theory, PHYSICAL REVIEW LETTER 110, 146403 (2013)

Hellgren M, Gross E.K.U., Discontinuities of the exchange-correlation kernel and charge-transfer excitations in time-dependent density-functional theory, PHYSICAL REVIEW A 85, 022514 (2012)

Hellgren M, von Barth U, Correlation energy functional and potential from time-dependent exact-exchange theory, JOURNAL OF CHEMICAL PHYSICS 132, 044101 (2010)

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