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Dipolar and quadrupolar correlations in the Re-based double perovskites BaYReO and BaScReO
Otkur Omar, Yang Zhang, Qiang Zhang +8
Double perovskites containing heavy transition metal ions are an important family of compounds for the study of the interplay between electron correlation and spin-orbit coupling.…
Tutorial: Extracting entanglement signatures from neutron spectroscopy
Allen Scheie, Pontus Laurell, Wolfgang Simeth +2
This tutorial is a pedagogical introduction to recent methods of computing quantum spin entanglement witnesses from spectroscopy, with a special focus on neutron scattering on quan…
Pairing tendencies in the doped Kitaev-Heisenberg model
Pontus Laurell, Bradraj Pandey, Gábor B. Halász +3
We study the impact of hole-doping on the Kitaev-Heisenberg model on the honeycomb lattice. We investigate the pairing tendencies and correlation functions in the framework of a $t…
Magnetic phase diagram of a two-orbital model for bilayer nickelates varying doping
Ling-Fang Lin, Yang Zhang, Nitin Kaushal +4
Motivated by the recently discovered high- bilayer nickelate superconductor LaNiO, we comprehensively research a bilayer cluster for different el…
Spectrum and low-temperature bulk properties of triangular quantum spin liquid candidate NaYbSe
A. O. Scheie, Minseong Lee, Kevin Wang +18
We report neutron scattering, pressure-dependent AC calorimetry, and AC magnetic susceptibility measurements of triangular lattice NaYbSe. We observe a continuum of scattering,…
Block Mott insulating state induced by next-nearest neighbor hopping in the S = 3/2 zigzag chain BaCoTe2O7
Ling-Fang Lin, Yang Zhang, Gonzalo Alvarez +2
Quasi-one-dimensional correlated electronic multi-orbital systems with either ladder or chain geometries continue attracting considerable interest due to their complex electronic p…
Luther-Emery liquid and dominant singlet superconductivity in the hole-doped Haldane spin-1 chain
Pontus Laurell, Jacek Herbrych, Gonzalo Alvarez +1
We investigate the pairing tendencies in the hole-doped Haldane spin-1 chain. To allow for doping, we extend the original spin chain Hamiltonian into a fermionic model involving a…
Spinon continuum in the Heisenberg quantum chain compound SrVO
Shang Gao, Ling-Fang Lin, Pontus Laurell +11
Magnetic excitations in the spin chain candidate SrVO have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandw…
Reconstructing the spatial structure of quantum correlations in materials
Allen Scheie, Pontus Laurell, Elbio Dagotto +2
Quantum correlations are a fundamental property of quantum many-body states. Yet they remain experimentally elusive, hindering certification of genuine quantum behavior, especially…
Transition to the Haldane phase driven by electron-electron correlations
A. Jażdżewska, M. Mierzejewski, M. Środa +4
One of the most famous quantum systems with topological properties, the spin antiferromagnetic Heisenberg chain, is well-known to display exotic e…
Stability of the novel interorbital-hopping mechanism for ferromagnetism in multi-orbital Hubbard models
Ling-Fang Lin, Yang Zhang, Gonzalo Alvarez +4
Recently, it was argued that a ferromagnetic (FM) insulating phase can be induced by a novel {\it interorbital} hopping mechanism. Here, we study the stability range of this novel…
Kanamori-Moiré-Hubbard model for transition metal dichalcogenide homobilayers
Nitin Kaushal, Elbio Dagotto
Ab-initio and continuum model studies predicted that the valley transition metal dichalcogenide (TMD) homobilayers could simulate the conventional multi-orbital Hubbard model o…
Electronic structure, magnetic properties, spin orientation, and doping effect in MnSiTe
Yang Zhang, Ling-Fang Lin, Adriana Moreo +1
The layered material MnSiTe, with alternating stacking honeycomb and triangular layers, is attracting considerable attention due to its rich physical properties. Here,…
Hund bands in spectra of multiorbital systems
M. Środa, J. Mravlje, G. Alvarez +2
Spectroscopy experiments are routinely used to characterize the behavior of strongly correlated systems. An in-depth understanding of the different spectral features is thus essent…
Spin dynamics of the generalized quantum spin compass chain
Pontus Laurell, Gonzalo Alvarez, Elbio Dagotto
We calculate the dynamical spin structure factor of the generalized spin- compass spin chain using the density matrix renormalization group. The model, also known as the twist…
Interfacial phase frustration stabilizes unconventional skyrmion crystals
Narayan Mohanta, Elbio Dagotto
Chiral magnetic phases with an unconventional topological twist in the magnetization are of huge interest due to their potential in spintronics applications. Here, we present a gen…
Magnetic ground states of honeycomb lattice Wigner crystals
Nitin Kaushal, Nicolás Morales-Durán, Allan H. MacDonald +1
Lattice Wigner crystal states stabilized by long-range Coulomb interactions have recently been realized in two-dimensional moiré materials. We employ large-scale unrestricted Hartr…
Topological Electronic Structure Evolution with Symmetry Breaking Spin Reorientation in (FeCo)Sn
Robert G. Moore, Satoshi Okamoto, Haoxiang Li +8
Topological materials hosting kagome lattices have drawn considerable attention due to the interplay between topology, magnetism, and electronic correlations. The (FeCo…
Strongly anisotropic electronic and magnetic structures in oxide dichlorides RuOCl and OsOCl
Yang Zhang, Ling-Fang Lin, Adriana Moreo +3
Here, using density functional theory and density matrix renormalization group methods, we investigate the electronic and magnetic properties of RuOCl and OsOCl with …
Electronic structure, magnetic properties and pairing tendencies of the copper-based honeycomb lattice NaCuTeO
Ling-Fang Lin, Rahul Soni, Yang Zhang +6
Spin- chains with alternating antiferromagnetic and ferromagnetic couplings have attracted considerable interest due to the topological character of their spin excitations. He…
Magnetic excitations, non-classicality and quantum wake spin dynamics in the Hubbard chain
Pontus Laurell, Allen Scheie, D. Alan Tennant +3
Recent work has demonstrated that quantum Fisher information (QFI), a witness of multipartite entanglement, and magnetic Van Hove correlations , a probe of local real-space…
Topological flat bands in a kagomé lattice multiorbital system
Satoshi Okamoto, Narayan Mohanta, Elbio Dagotto +1
Flat bands and dispersive Dirac bands are known to coexist in the electronic bands in a two-dimensional kagome lattice. Including the relativistic spin-orbit coupling, such systems…
Range of biquadratic and triquadratic Heisenberg effective couplings deduced from multiorbital Hubbard models
Rahul Soni, Nitin Kaushal, Cengiz Şen +3
We studied a multi-orbital Hubbard model at half-filling for two and three orbitals per site on a two-site cluster via full exact diagonalization, in a wide range for the onsite re…
Prediction of orbital selective Mott phases and block magnetic states in the quasi-one-dimensional iron chain CeOFeSe under hole and electron doping
Ling-Fang Lin, Yang Zhang, Gonzalo Alvarez +3
The recent detailed study of quasi-one-dimensional iron-based ladders, with the iron electronic density , has unveiled surprises, such as orbital-selective phases. Howe…