Publications (36)
Signatures of exciton condensation in a transition metal dichalcogenide
Anshul Kogar, Melinda S. Rak, Sean Vig +9
Bose condensation has shaped our understanding of macroscopic quantum phenomena, having been realized in superconductors, atomic gases, and liquid helium. Excitons are bosons that…
Electronic Sound and Diffusion in Disordered Multiband Metals
Miguel-Ãngel Sánchez-MartÃnez, Blaise Goutéraux, Louk Rademaker +1
Multiband metals can host acoustic plasmons: gapless collective charge excitations involving out-of-phase motion of electrons in different bands, sometimes referred to as 'demons'.…
Classical Dimers on Penrose Tilings
Felix Flicker, Steven H. Simon, S. A. Parameswaran
We study the classical dimer model on rhombic Penrose tilings, whose edges and vertices may be identified with those of a bipartite graph. We find that Penrose tilings do not admit…
Quasiperiodicity and 2D Topology in 1D Charge Ordered Materials
Felix Flicker, Jasper van Wezel
It has recently been argued that individual 1D quasicrystals can be ascribed 2D topological quantum numbers and a corresponding set of topologically protected edge modes. Here, we…
Hamiltonian Cycles on Ammann-Beenker Tilings
Shobhna Singh, Jerome Lloyd, Felix Flicker
We provide a simple algorithm for constructing Hamiltonian graph cycles (visiting every vertex exactly once) on a set of arbitrarily large finite subgraphs of aperiodic two-dimensi…
Floquet Engineering Ultracold Polar Molecules to Simulate Topological Insulators
Thomas Schuster, Felix Flicker, Ming Li +4
We present a quantitative, near-term experimental blueprint for the quantum simulation of topological insulators using lattice-trapped ultracold polar molecules. In particular, we…
Exact Solution to the Quantum and Classical Dimer Models on the Spectre Aperiodic Monotiling
Shobhna Singh, Felix Flicker
The decades-long search for a shape that tiles the plane only aperiodically under translations and rotations recently ended with the discovery of the `spectre' aperiodic monotile.…
Pell and Clapeyron Words as Stable Trajectories in Dynamical Systems
Felix Flicker
We establish the existence of `time quasicrystals', tilings of the time axis with two unit cells of different duration. These aperiodic tilings can be constructed as slices through…
Proposal for the Detection of Magnetic Monopoles in Spin Ice via Nanoscale Magnetometry
Franziska K. K. Kirschner, Felix Flicker, Amir Yacoby +2
We present a proposal for applying nanoscale magnetometry to the search for magnetic monopoles in the spin ice materials holmium and dysprosium titanate. Employing Monte Carlo simu…
Fractal Topology of Majorana Bound States in Superconducting Quasicrystals
William Caiger, Felix Flicker, Miguel-Ãngel Sánchez-MartÃnez
Quasicrystalline order induces a fractal energy spectrum, yet its impact on topological protection remains an open fundamental question. Here, we demonstrate that the topological p…
Time Quasilattices in Dissipative Dynamical Systems
Felix Flicker
We establish the existence of `time quasilattices' as stable trajectories in dissipative dynamical systems. These tilings of the time axis, with two unit cells of different duratio…
One-Dimensional Quasicrystals from Incommensurate Charge Order
Felix Flicker, Jasper van Wezel
Artificial quasicrystals are nowadays routinely manufactured, yet only two naturally occurring examples are known. We present a class of systems with the potential to be realized b…
Charge Order from Orbital-dependent Coupling Evidenced by NbSe
Felix Flicker, Jasper van Wezel
Niobium diselenide has long served as a prototype of two-dimensional charge ordering, believed to arise from an instability of the electronic structure analogous to the one-dimensi…
Magnetic Monopole Noise
Ritika Dusad, Franziska K. K. Kirschner, Jesse C. Hoke +6
Magnetic monopoles are hypothetical elementary particles exhibiting quantized magnetic charge and quantized magnetic flux . A classic proposal for…
Compression theory for inhomogeneous systems
Doruk Efe Gökmen, Sounak Biswas, Sebastian D. Huber +3
The physics of complex systems stands to greatly benefit from the qualitative changes in data availability and advances in data-driven computational methods. Many of these systems…
Weak-coupling superconductivity in an anisotropic three-dimensional repulsive Hubbard model
Henrik Schou Røising, Felix Flicker, Thomas Scaffidi +1
We study a three-dimensional single-band repulsive Hubbard model at weak coupling. We establish the superconducting phase diagram in the parameter space of the chemical potential a…
Finite temperature effects on Majorana bound states in chiral -wave superconductors
Henrik Schou Røising, Roni Ilan, Tobias Meng +2
We study Majorana fermions bound to vortex cores in a chiral -wave superconductor at temperatures non-negligible compared to the superconducting gap. Thermal occupation of Carol…
Conformal Quasicrystals and Holography
Latham Boyle, Madeline Dickens, Felix Flicker
Recent studies of holographic tensor network models defined on regular tessellations of hyperbolic space have not yet addressed the underlying discrete geometry of the boundary. We…
Realizing Hopf Insulators in Dipolar Spin Systems
Thomas Schuster, Felix Flicker, Ming Li +4
The Hopf insulator is a weak topological insulator characterized by an insulating bulk with conducting edge states protected by an integer-valued linking number invariant. The stat…
Spinon mediation of witness spin dynamics in herbertsmithite
Hiroto Takahashi, Jack Murphy, Mitikorn Wood-Thanan +12
The kagome lattice of spin-1/2 copper atoms in herbertsmithite is conjectured to sustain a quantum spin liquid state with spinon quasiparticles. Ideally, the kagome crystal planes…
Lifshitz transition enabling superconducting dome around the quantum critical point in TiSe
R. D. H. Hinlopen, Owen Moulding, Will Broad +9
Superconductivity often emerges as a dome around a quantum critical point (QCP) where long-range order is suppressed to zero temperature. So far, this has been mostly studied in ma…
In-plane anisotropy of charge density wave fluctuations in 1-TiSe
Xuefei Guo, Anshul Kogar, Jans Henke +17
We report measurements of anisotropic triple- charge density wave (CDW) fluctuations in the transition metal dichalcogenide 1-TiSe over a large volume of reciprocal space…
Superconducting order of from a three-dimensional microscopic model
Henrik S. Røising, Thomas Scaffidi, Felix Flicker +2
We compute and compare even- and odd-parity superconducting order parameters of strontium ruthenate () in the limit of weak interactions, resulting fro…
Charge order from structured coupling in VSe
Jans Henke, Felix Flicker, Jude Laverock +1
Charge order--ubiquitous among correlated materials--is customarily described purely as an instability of the electronic structure. However, the resulting theoretical predictions o…
Charge Ordering Geometries in Uniaxially-Strained NbSe
Felix Flicker, Jasper van Wezel
Recent STM experiments reveal niobium diselenide to support domains of striped (1Q) charge order side-by-side with its better-known triangular (3Q) phase, suggesting that small var…
Absence of superconducting dome at the charge-density-wave quantum phase transition in 2H-NbSe2
Owen Moulding, Israel Osmond, Felix Flicker +2
Superconductivity is often found in a dome around quantum critical points, i.e. 2nd-order quantum phase transitions. Here, we show that an enhancement of superconductivity is avoid…
Chiral Optical Response of Multifold Fermions
Felix Flicker, Fernando de Juan, Barry Bradlyn +3
Multifold fermions are generalizations of two-fold degenerate Weyl fermions with three-, four-, six- or eight-fold degeneracies protected by crystal symmetries, of which only the l…
Atomic-Scale Strain Manipulation of a Charge Density Wave
Shang Gao, Felix Flicker, Raman Sankar +9
A charge density wave (CDW) is one of the fundamental instabilities of the Fermi surface occurring in a wide range of quantum materials. In dimensions higher than one, where Fermi…
Inducing superconductivity in Weyl semi-metal microstructures by selective ion sputtering
Maja D. Bachmann, Nityan Nair, Felix Flicker +7
By introducing a superconducting gap in Weyl- or Dirac semi-metals, the superconducting state inherits the non-trivial topology of their electronic structure. As a result, Weyl sup…
Charge Order in NbSe
Felix Flicker, Jasper van Wezel
We develop in detail a model of the charge order in NbSe deriving from a strong electron-phonon coupling dependent on the ingoing and outgoing electron momenta as well as the e…
A microscopic Ginzburg--Landau theory and singlet ordering in SrRuO
Glenn Wagner, Henrik S. Røising, Felix Flicker +1
The long-standing quest to determine the superconducting order of SrRuO (SRO) has received renewed attention after recent nuclear magnetic resonance (NMR) Knight shift expe…
Statistical mechanics of dimers on quasiperiodic Ammann-Beenker tilings
Jerome Lloyd, Sounak Biswas, Steven H. Simon +2
We study classical dimers on two-dimensional quasiperiodic Ammann-Beenker (AB) tilings. Despite the lack of periodicity we prove that each infinite tiling admits 'perfect matchings…
Superconvergence of Topological Entropy in the Symbolic Dynamics of Substitution Sequences
Leon Zaporski, Felix Flicker
We consider infinite sequences of superstable orbits (cascades) generated by systematic substitutions of letters in the symbolic dynamics of one-dimensional nonlinear systems in th…
Multiband charge density wave exposed in a transition metal dichalcogenide
Ãrpád Pásztor, Alessandro Scarfato, Marcello Spera +5
In the presence of multiple bands, well-known electronic instabilities may acquire new complexity. While multiband superconductivity is the subject of extensive studies, the possib…
Physical properties of an Aperiodic monotile: Graphene-like features, chirality and zero-modes
Justin Schirmann, Selma Franca, Felix Flicker +1
The discovery of the Hat, an aperiodic monotile, has revealed novel mathematical aspects of aperiodic tilings. However, the physics of particles propagating in such a setting remai…
Uniaxial Strain Tuning of Superconductivity in 2-NbSe
Andrew Wieteska, Ben Foutty, Zurab Guguchia +7
We explore the effect of lattice anisotropy on the charge-ordered superconductor 2H-NbSe. Using a novel strain apparatus, we measure the superconducting transition temperatur…