MPBH ‒ LQM ‐ EPFL

The integrated network Mott Physics Beyond the Heisenberg Model (MPBH) united researchers across Switzerland in a collective effort to explore new aspects of Mott physics, in particular how spin-orbit interactions, in concert with strong electron correlations, lead to new and exotic quantum materials and phenomena.

The far-reaching achievements of the network were made possible only by assembling researchers with expertise in many complementary disciplines, who were hosted by the Swiss Federal Institute of Technology Lausanne (EPFL), the Paul Scherrer Institute (PSI), the University of Geneva (UNIGE), the Swiss Federal Institute of Technology Zurich (ETHZ) and the University of Zurich (UniZH).

The holistic approach of MPBH enabled us to synthesise and study promising materials by multiple techniques, thereby enabling profound advances in understanding their nature and quantum behaviour.

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Publications

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Mott Physics Beyond the Heisenberg Model

H. M. Rønnow; J. Chang; T. Schmitt; F. Mila; M. Grioni et al.

2020-09-10

Publications

Mott Physics Beyond the Heisenberg Model

Persistent antiferromagnetic order in heavily overdoped Ca1-xLaxFeAs2

Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9

Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)(2)]BF4

Strain-engineering Mott-insulating La2CuO4

Probing multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3

Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering

Note: Commercial SQUID magnetometer-compatible NMR probe and its application for studying a quantum magnet

Dispersive magnetic and electronic excitations in iridate perovskites probed by oxygen K-edge resonant inelastic x-ray scattering

Direct electric field control of the skyrmion phase in a magnetoelectric insulator

A-cation control of magnetoelectric quadrupole order in A(TiO)Cu-4(PO4)(4) (A = Ba, Sr, and Pb)

Charge-Stripe Order and Superconductivity in Ir1−xPtxTe2

Mapping the lattice dynamical anomaly of the order parameters across the Verwey transition in magnetite

Magnetic structure of Ba(TiO)Cu4(PO4)4 probed using spherical neutron polarimetry

Electronic and magnetic excitations in the half-stuffed Cu-O planes of Ba2Cu3O4Cl2 measured by resonant inelastic x-ray scattering

Hallmarks of Hunds coupling in the Mott insulator Ca2RuO4

J1−J2 square-lattice Heisenberg antiferromagnets with 4d1 spins: AMoOPO4Cl (A=K,Rb)

MnO nanoparticles as the cause of ferromagnetism in bulk dilute Mn-doped ZnO

Probing strongly hybridized nuclear-electronic states in a model quantum ferromagnet

Electromagnon dispersion probed by inelastic X-ray scattering in LiCrO2

Magnetic Excitations and Electronic Interactions in Sr2CuTeO6: A Spin-1/2 Square Lattice Heisenberg Antiferromagnet

Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas

Dimensional Reduction in Quantum Dipolar Antiferromagnets

Pressure dependence of the structure and electronic properties of Sr3Ir2O7

One-dimensional Bose-Einstein condensation of photons in a microtube

Origin of the Spin-Orbital Liquid State in a Nearly J=0 Iridate Ba3ZnIr2O9

Correlation of the superconducting critical temperature with spin and orbital excitations in (CaxLa1− x)(Ba1. 75− xLa 0. 25) Cu3Oy as measured by resonant inelastic x-ray scattering

One-dimensional quantum magnetism in the anhydrous alum KTi(SO4)(2)

Magnons in tetragonal CuO

Sc2Ga2CuO7: A possible quantum spin liquid near the percolation threshold

Intrachain antiferromagnetic exchange in a 1D branched-chain built of two different copper(II) centres interlinked by end-on azido and phenoxo bridges: electron density map, electrochemical and magnetic properties

Evidence of quantum dimer excitations in Sr3Ir2O7

Importance of XY anisotropy in Sr2IrO4 revealed by magnetic critical scattering experiments

Magnetic model in multiferroic NdFe3(BO3)(4) investigated by inelastic neutron scattering

Pressure dependence of the magnetic order in CrAs: A neutron diffraction investigation

Pressure induced evolution of superconductivity and magnetic hourglass dispersion in Fe1.02Te0.7Se0.3

Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study

Crystal Structure, Transport, and Magnetic Properties of an Ir6+ Compound Ba8Al2IrO14

Fractional excitations in the square-lattice quantum antiferromagnet

Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors

Self-doping processes between planes and chains in the metal-to-superconductor transition of YBa2Cu3O6.9

Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates

Femtosecond Dynamics of Momentum-Dependent Magnetic Excitations from Resonant Inelastic X-Ray Scattering in CaCu2O3

Charge-orbital-lattice coupling effects in the dd excitation profile of one-dimensional cuprates

Angle-Resolved Photoemission Spectroscopy of Tetragonal CuO: Evidence for Intralayer Coupling Between Cupratelike Sublattices

Anisotropic softening of magnetic excitations along the nodal direction in superconducting cuprates

Nonequilibrium hysteresis and spin relaxation in the mixed-anisotropy dipolar-coupled spin-glass LiHo0.5Er0.5F4

Exploring the spin-orbital ground state of Ba3CuSb2O9

Correlated Decay of Triplet Excitations in the Shastry-Sutherland Compound SrCu2(BO3)(2)

Bilayer splitting and wave functions symmetry in Sr3Ir2O7

Nodal Landau Fermi-liquid quasiparticles in overdoped La1.77Sr0.23CuO4

L4Fe2As2Te1-xO4-yFy (L = Pr, Sm, Gd): A layered oxypnictide superconductor with T-c up to 45 K

Quantum and thermal ionic motion, oxygen isotope effect, and superexchange distribution in La2CuO4

Orbital occupancies and the putative j(eff)=1/2 ground state in Ba2IrO4: A combined oxygen K-edge XAS and RIXS study

The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

Theory of spin excitations in a quantum spin-nematic state

Robustness of Basal-Plane Antiferromagnetic Order and the Jeff=1/2 State in Single-Layer Iridate Spin-Orbit Mott Insulators

Glassy low-energy spin fluctuations and anisotropy gap in La1.88Sr0.12CuO4

Huge critical current density and tailored superconducting anisotropy in SmFeAsO0.8F0.15 by low-density columnar-defect incorporation

Locking of iridium magnetic moments to the correlated rotation of oxygen octahedra in Sr2IrO4 revealed by x-ray resonant scattering

Phase diagram of the spin-1 Heisenberg model with three-site interactions on the square lattice

Possible spin-orbit driven spin-liquid ground state in the double perovskite phase of Ba3YIr2O9

Spin-gap evolution upon Ca doping in the spin-ladder series Sr(14−x)CaxCu24O41 studied by inelastic neutron scattering

Temperature-dependent electron-phonon coupling in La_{2−x}Sr_{x}CuO_{4} probed by femtosecond x-ray diffraction

Phase diagram with an enhanced spin-glass region of the mixed Ising–XY magnet LiHoxEr1-xF4

Low-temperature spin dynamics of a valence bond glass in Ba2YMoO6

Determining the Short-Range Spin Correlations in the Spin-Chain Li2CuO2 and CuGeO3 Compounds Using Resonant Inelastic X-Ray Scattering