4 papers
Mode-selective phonon effects on magnetism and superconductivity in trilayer nickelates
C. Alexander Baum, Jun Zhan, Congcong Le +2
The discovery of high- superconductivity in multilayer nickelates has stimulated intense interest, yet the microscopic origins of their correlated states remain debated. Recen…
Pair density wave order from non-symmorphic momentum symmetry
Matteo Dürrnagel, C. Alexander Baum, Michael Klett +2
We develop a class of microscopic lattice models in which pair density wave order emerges in the asymptotically exact weak coupling limit. The underlying mechanism is due to non-sy…
Exotic Electronic Order in a Parabolic Kagome Semimetal
C. Alexander Baum, Jonas Issing, Sarbajit Mazumdar +4
We study an interacting kagome-lattice realization of a quadratic band-touching semimetal at 2/3 filling with onsite and nearest-neighbor repulsive interactions. Combining function…
Electron-Phonon Functional Renormalization Group of Fermi Liquid Instabilities
C. Alexander Baum, Matteo Dürrnagel, Ronny Thomale +1
We formulate a functional renormalization group (FRG) ansatz for correlated electron models that incorporates electronic interactions as well as electron-phonon coupling (EPC) stem…