154 citations · 950 across the 40 of their papers we have counts for
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Chiral bosonic mean-field Ansatz and spin dynamics in spin-1 Kitaev magnets
Daiki Sasamoto, Arnaud Ralko, Jaime Merino +1
The Kitaev model is a paradigmatic system for realizing quantum spin liquids, but its higher-spin extensions are not exactly solvable, and their spin dynamics is less well understo…
Order-by-disorder from Schwinger bosons in a frustrated honeycomb ferromagnet
Arnaud Ralko, Jaime Merino
The cobalt-based honeycomb magnet BaCo(AsO) (BCAO) has recently emerged as a promising platform for frustrated magnetism beyond conventional paradigms. Neutron-scatteri…
Strange metal transport from coupling to fluctuating spins
Simone Fratini, Ivan Duchemin, Arnaud Ralko +1
Metals hosting strong electronic interactions, including high-temperature superconductors, behave in ways that do not conform to normal Fermi liquid theory. To pinpoint the microsc…
Even-odd effect in multilayer Kitaev honeycomb magnets
Jaime Merino, Arnaud Ralko
Motivated by the three-dimensional structure of Kitaev materials we explore multilayer Kitaev models. The magnetic properties of a multilayer of an arbitrary number of Kitaev honey…
Chiral bosonic quantum spin liquid in the integer-spin Heisenberg-Kitaev model
Arnaud Ralko, Jaime Merino
Motivated by the possibility of finding a bosonic quantum spin liquid in the integer spin- Heisenberg-Kitaev model on the honeycomb lattice, we derive a Schwinger boson mean fie…
Transient localization from the interaction with quantum bosons
H. Rammal, A. Ralko, S. Ciuchi +1
We carefully revisit the electron-boson scattering problem, going beyond popular semi-classical treatments. By providing numerically exact results valid at finite temperatures, we…
A quantum theory of the nearly frozen charge glass
S. Fratini, K. Driscoll, S. Ciuchi +1
We study long-range interacting electrons on the triangular lattice using mixed quantum/classical simulations going beyond the usual classical descriptions of the lattice Coulomb f…
Schwinger boson theory of the J1,J2=J3 kagome antiferromagnet
Tristan Lugan, Ludovic D. C. Jaubert, Masafumi Udagawa +1
We study the kagome antiferromagnet for quantum spin-1/2 with first J1, second J2 and third J3 neighbour exchanges, along the J2 = J3 = J line. We use Schwinger-boson mean-field th…
Majorana chiral spin liquid in Mott insulating cuprates
Jaime Merino, Arnaud Ralko
The large thermal Hall conductivity recently detected in Mott insulating cuprates has been attributed to chiral neutral spin excitations. A quantum spin liquid with Majorana excita…
Quantum paramagnetism and magnetization plateaus in a kagome-honeycomb Heisenberg antiferromagnet
Meghadeepa Adhikary, Arnaud Ralko, Brijesh Kumar
A spin-1/2 Heisenberg model on honeycomb lattice is investigated by doing triplon analysis and quantum Monte Carlo calculations. This model, inspired by Cu(pymca)(ClO),…
Pseudogap metal induced by long-range Coulomb interactions
Katherine Driscoll, Arnaud Ralko, Simone Fratini
In correlated electron systems the metallic character of a material can be strongly suppressed near an integer concentration of conduction electrons as Coulomb interactions forbid…
Novel chiral quantum spin liquids in Kitaev magnets
Arnaud Ralko, Jaime Merino
Mott insulators under sufficiently strong spin-orbit coupling can display quantum spin liquid phases with topological order and fractional excitations. Quantum magnets with pure Ki…
Topological Nematic Spin Liquid on the Square-Kagome Lattice
Tristan Lugan, L. D. C Jaubert, Arnaud Ralko
The ground state of the spin kagome antiferromagnet remains uncertain despite decades of active research. Here we step aside from this debated question to address the ground-…
Spin molecular-orbit coupling and magnetic properties of the decorated honeycomb layers of Mo3S7(dmit)3 crystals
J. Merino, A. C. Jacko, A. L. Khosla +2
We explore the magnetic properties of isolated a-b planes of trinuclear organometallic crystals, Mo3S7(dmit)3, in which an interplay of strong electronic correlations and spin mole…
Role of quantum fluctuations on spin liquids and ordered phases in the Heisenberg model on the honeycomb lattice
J. Merino, A. Ralko
Motivated by the rich physics of honeycomb magnetic materials, we obtain the phase diagram and analyze magnetic properties of the spin-1/2 and spin-1 J1-J2-J3 Heisenberg model on t…
Microscopic theory of the nearest-neighbor valence bond sector of the spin-1/2 kagome antiferromagnet
Arnaud Ralko, Frédéric Mila, Ioannis Rousochatzakis
The spin-1/2 Heisenberg model on the kagome lattice, which is closely realized in layered Mott insulators such as ZnCu(OH)Cl, is one of the oldest and most enigmatic sp…
Avoiding Stripe Order: Emergence of the Supercooled Electron Liquid
Louk Rademaker, Arnaud Ralko, Simone Fratini +1
In the absence of disorder, electrons can display glassy behavior through supercooling the liquid state, avoiding the solidification into a charge ordered state. Such supercooled e…
Resonating valence bond physics is not always governed by the shortest tunneling loops
Arnaud Ralko, Ioannis Rousochatzakis
It is well known that in quantum spin liquids and other magnetically disordered systems, the tunneling amplitudes between different nearest-neighbor valence bond (NNVB) configurati…
Multiorbital kinetic effects on charge ordering of frustrated electrons on the triangular lattice
C. Février, S. Fratini, A. Ralko
The role of the multiorbital effects on the emergence of frustrated electronic orders on the triangular lattice at half filling is investigated through an extended spinless fermion…
Pinball liquid phase from Hund's coupling in frustrated transition metal oxides
Arnaud Ralko, Jaime Merino, Simone Fratini
The interplay of non-local Coulomb repulsion and Hund's coupling in the d-orbital manifold in frustrated triangular lattices is analyzed by a mutliband extended Hubbard model. We f…
Glassy dynamics in geometrically frustrated Coulomb liquids without disorder
Samiyeh Mahmoudian, Louk Rademaker, Arnaud Ralko +2
We show that introducing long-range Coulomb interactions immediately lifts the massive ground state degeneracy induced by geometric frustration for electrons on quarter-filled tria…
Phase diagram of the 1/3-filled extended Hubbard model on the Kagome lattice
Karim Ferhat, Arnaud Ralko
We study the phase diagram of the extended Hubbard model on the kagome lattice at 1/3 filling. By combining a configuration interaction approach to an unrestricted Hartree-Fock, we…
Emergent Heavy Fermion Behavior at the Wigner-Mott Transition
Jaime Merino, Arnaud Ralko, Simone Fratini
We study charge ordering driven by Coulomb interactions on triangular lattices relevant to the Wigner-Mott transition in two dimensions. Dynamical mean-field theory reveals the pin…
Statistics of holes and nature of superfluid phases in Quantum dimer models
C. A. Lamas, A. Ralko, M. Oshikawa +2
Quantum Dimer Models (QDM) arise as low energy effective models for frustrated magnets. Some of these models have proven successful in generating a scenario for exotic spin liquid…