276 citations · 5.9k across the 130 of their papers we have counts for
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Observation of termination-dependent topological connectivity in a magnetic Weyl kagome-lattice
Federico Mazzola, Stefan Enzner, Philipp Eck +20
Engineering surfaces and interfaces of materials promises great potential in the field of heterostructures and quantum matter designer, with the opportunity of driving new many-bod…
Protection of Correlation-Induced Phase Instabilities by Exceptional Susceptibilities
Matthias Reitner, Lorenzo Crippa, Dominik Robert Fus +3
At thermal equilibrium, we find that generalized susceptibilities encoding the static physical response properties of Hermitian many-electron systems possess inherent non-Hermitian…
Flat band separation and robust spin-Berry curvature in bilayer kagome metals
Domenico Di Sante, Chiara Bigi, Philipp Eck +16
Kagome materials have emerged as a setting for emergent electronic phenomena that encompass different aspects of symmetry and topology. It is debated whether the XVSn kagom…
Heterogeneous Ta-dichalcogenide bilayer: heavy fermions or doped Mott physics?
Lorenzo Crippa, Hyeonhu Bae, Paul Wunderlich +5
Controlling and understanding electron correlations in quantum matter is one of the most challenging tasks in materials engineering. In the past years a plethora of new puzzling co…
Dynamics and Resilience of the Charge Density Wave in a bilayer kagome metal
Manuel Tuniz, Armando Consiglio, Denny Puntel +22
Long-range electronic order descending from a metallic parent state constitutes a rich playground to study the intricate interplay of structural and electronic degrees of freedom.…
Symmetric Kondo Lattice States in Doped Strained Twisted Bilayer Graphene
H. Hu, G. Rai, L. Crippa +7
We use the topological heavy fermion (THF) model and its Kondo Lattice (KL) formulation to study the symmetric Kondo state in twisted bilayer graphene. Via a large-N approximation,…
Mott insulators with boundary zeros
Niklas Wagner, Lorenzo Crippa, Adriano Amaricci +9
The topological classification of electronic band structures is based on symmetry properties of Bloch eigenstates of single-particle Hamiltonians. In parallel, topological field th…
Non-perturbative intertwining between spin and charge correlations: A "smoking gun" single-boson-exchange result
Severino Adler, Friedrich Krien, Patrick Chalupa-Gantner +2
We study the microscopic mechanism controlling the interplay between local charge and local spin fluctuations in correlated electron systems via a thorough investigation of the gen…
Aberration of the Green's function estimator in hybridization expansion continuous-time quantum Monte Carlo
Andreas Hausoel, Markus Wallerberger, Josef Kaufmann +2
We describe an aberration of the resampling estimator for the Green's function customarily used in hybridization expansion continuous-time quantum Monte Carlo. It occurs due to Pau…
Spontaneous Formation of Exceptional Points at the Onset of Magnetism
Lorenzo Crippa, Giorgio Sangiovanni, Jan Carl Budich
We reveal how symmetry protected nodal points in topological semimetals may be promoted to pairs of generically stable exceptional points (EPs) by symmetry-breaking fluctuations at…
Mott Quantum Critical Points at finite doping
Maria Chatzieleftheriou, Alexander Kowalski, Maja Berović +5
Strongly correlated materials often undergo a Mott metal-insulator transition, which is tipically first-order, as a function of control parameters like pressure. Upon doping, rich…
Electronic correlations and universal long-range scaling in kagome metals
Domenico Di Sante, Bongjae Kim, Werner Hanke +4
We investigate the real-space profile of effective Coulomb interactions in correlated kagome materials. By particularizing to KVSb, CoSnS, FeSn, and NiIn, w…
Deep Learning the Functional Renormalization Group
Domenico Di Sante, Matija Medvidović, Alessandro Toschi +4
We perform a data-driven dimensionality reduction of the scale-dependent 4-point vertex function characterizing the functional Renormalization Group (fRG) flow for the widely studi…
Local vs non-local correlation effects in interacting quantum spin Hall insulators
Lorenzo Crippa, Adriano Amaricci, Severino Adler +2
The impact of Coulomb interaction on the electronic properties of a quantum spin-Hall insulator is studied using quantum cluster methods, disentangling local from non-local effects…
Hard x-ray angle-resolved photoemission from a buried high-mobility electron system
Michael Zapf, Matthias Schmitt, Judith Gabel +18
Novel two-dimensional electron systems at the interfaces and surfaces of transition-metal oxides recently have attracted much attention as they display tunable, intriguing properti…
Fourth-Order Exceptional Points in Correlated Quantum Many-Body Systems
Lorenzo Crippa, Jan Carl Budich, Giorgio Sangiovanni
Non-Hermtian (NH) Hamiltonians effectively describing the physics of dissipative systems have become an important tool with applications ranging from classical meta-materials to qu…
Twofold van Hove singularity and origin of charge order in topological kagome superconductor CsV3Sb5
Mingu Kang, Shiang Fang, Jeong-Kyu Kim +14
The layered vanadium antimonides AV3Sb5 (A = K, Rb, Cs) are a recently discovered family of topological kagome metals with a rich phenomenology of strongly correlated electronic ph…
Resistivity Exponents in 3D-Dirac Semimetals From Electron-Electron Interaction
Niklas Wagner, Sergio Ciuchi, Alessandro Toschi +2
We study the resistivity of three-dimensional semimetals with linear dispersion in the presence of on-site electron-electron interaction. The well-known quadratic temperature depen…
Kondo screening in Co adatoms with full Coulomb interaction
Angelo Valli, Marc Philipp Bahlke, Alexander Kowalski +3
Using a numerically exact first-principles many-body approach, we revisit the "prototypical" Kondo case of a cobalt impurity on copper. Even though this is considered a well unders…
Attractive effect of a strong electronic repulsion -- the physics of vertex divergences
M. Reitner, P. Chalupa, L. Del Re +4
While the breakdown of the perturbation expansion for the many-electron problem has several formal consequences, here we unveil its physical effect: Flipping the sign of the effect…
Deconfinement of Mott Localized Electrons into Topological and Spin-Orbit Coupled Dirac Fermions
José M. Pizarro, Severino Adler, Karim Zantout +5
The interplay of electronic correlations, spin-orbit coupling and topology holds promise for the realization of exotic states of quantum matter. Models of strongly interacting elec…
Characteristic Timescales of the Local Moment Dynamics in Hund's-metals
C. Watzenböck, M. Edelmann, D. Springer +2
We study the characteristic time scales of the fluctuating local moments in Hund's metal systems for different degrees of correlation. By analyzing the dynamical spin susceptibilit…
Coulomb Engineering of two-dimensional Mott materials
Erik G. C. P. van Loon, Malte Schüler, Daniel Springer +3
Two-dimensional materials can be strongly influenced by their surroundings. A dielectric environment screens and reduces the Coulomb interaction between electrons in the two-dimens…
Single-Co Kondo effect in atomic Cu wires on Cu(111)
Nicolas Néel, Jörg Kröger, Malte Schüler +4
Linear atomic chains containing a single Kondo atom, Co, and several nonmagnetic atoms, Cu, were assembled atom by atom on Cu(111) with the tip of a scanning tunneling microscope.…