Electronic correlations in functionalized graphene on SiC (T2)

Project description

Graphene is an all-surface material. Its low-energy electrons can be tuned from massless Dirac fermions to flat band behavior upon strong charge doping. We intend to explore how this uniquely controllable electronic system can be utilized to establish functionalized graphene on SiC as platform to realize and control electronic correlation phenomena. We will combine computational firstprinciples and many-body approaches to understand the emerging electronic structure, when Mott insulating and superconducting surface systems as well as heavily charge doping layers are brought in direct proximity to graphene. Overarching questions will be which kind of electronic correlation effects arise in the hybrid interface systems and how these respond to tuning knobs like charge doping, stacking, and generically atomic scale manipulations of the interface.


Composition of the project group


Project-related publications

Ab Initio Phonon Self-Energies and Fluctuation Diagnostics of Phonon Anomalies: Lattice Instabilities from Dirac Pseudospin Physics in Transition Metal Dichalcogenides

J. Berges, E. G. C. P. van Loon, A. Schobert, M. Rösner, T. O. Wehling, Phys. Rev. B 101, 155107 (2020)

DOI-Link

Deconfinement of Mott Localized Electrons into Topological and Spin-Orbit-Coupled Dirac Fermions

J. M. Pizarro, S. Adler, K. Zantout, T. Mertz, P. Barone, R. Valentí, G. Sangiovanni, T. O. Wehling, npj Quantum Mater. 5, 1 (2020)

DOI-Link

Introducing strong correlation effects into graphene by gadolinium intercalation

S. Link, S. Forti, A. Stohr, K. Küster, M. Rosner, D. Hirschmeier, C. Chen, J. Avila, M. C. Asensio, A. A. Zakharov, T. O. Wehling, A. I. Lichtenstein, M. I. Katsnelson, U. Starke, Phys. Rev. B 100, 121407(R) (2019)

DOI-Link

Internal screening and dielectric engineering in magic-angle twisted bilayer graphene

J. M. Pizarro, M. Rösner, R. Thomale, R. Valentí, T. O. Wehling, Phys. Rev. B 100, 161102(R) (2019)

DOI-Link

Manifestation of nonlocal electron-electron interaction in graphene

S. Ulstrup, M. Schüler, M. Bianchi, F. Fromm, C. Raidel, T. Seyller, T.Wehling, P. Hofmann, Phys. Rev. B 94, 081403(R) (2016)

DOI-Link

Wannier function approach to realistic Coulomb interactions in layered materials and heterostructures

M. Rösner, E. Şaşioğlu, C. Friedrich, S. Blügel, T. O. Wehling, Phys. Rev. B 92, 085102 (2015)

DOI-Link

Dirac materials

T. O.Wehling, A. M. Black-Schaffer, A. V. Balatsky, Adv. Phys. 63, 1 (2014)

DOI-Link

Optimal Hubbard Models for Materials with Nonlocal Coulomb Interactions: Graphene, Silicene, and Benzene

M. Schüler, M. Rösner, T. O. Wehling, A. I. Lichtenstein, M. I. Katsnelson, Phys. Rev. Lett. 111, 036601 (2013)

DOI-Link

Strength of Effective Coulomb Interactions in Graphene and Graphite

T. O. Wehling, E. Şaşioğlu, C. Friedrich, A. I. Lichtenstein, M. I. Katsnelson, S. Blügel, Phys. Rev. Lett. 106, 236805 (2011)

DOI-Link

Orbitally controlled Kondo effect of Co adatoms on graphene

T. O. Wehling, A. V. Balatsky, M. I. Katsnelson, A. I. Lichtenstein, A. Rosch, Phys. Rev. B 81, 115427 (2010)

DOI-Link

Tim Wehling
U Hamburg
+49 40 42838-2916
twehling@physik.uni-hamburg.de

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