Matteo Mitrano
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View article: Photoinduced frustration modulation in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>κ</mml:mi></mml:math>-type quantum spin liquid candidates
Photoinduced frustration modulation in -type quantum spin liquid candidates Open
Geometric frustration is a key parameter controlling electronic and magnetic properties of quantum spin liquid systems, yet remains challenging to tune. Here, we coherently drive molecular vibrations with midinfrared pulses in two organic …
View article: Observation of Anisotropic Dispersive Dark-Exciton Dynamics in CrSBr
Observation of Anisotropic Dispersive Dark-Exciton Dynamics in CrSBr Open
Many-body excitons in CrSBr are attracting intense interest in view of their highly anisotropic magneto-optical coupling and their potential for novel optical interfaces within spintronic and magnonic devices. Characterizing the orbital ch…
View article: Ultrafast electronic coherence from slow phonons
Ultrafast electronic coherence from slow phonons Open
Light offers a route to engineer new phases of matter far from equilibrium, including transient states suggestive of superconducting, charge-ordered, and excitonic ordering behavior. Yet it remains unclear how optical excitation can dynami…
View article: Photoinduced Frustration Modulation in $κ$-type Quantum Spin Liquid Candidates
Photoinduced Frustration Modulation in $κ$-type Quantum Spin Liquid Candidates Open
Geometric frustration is a key parameter controlling electronic and magnetic properties of quantum spin liquid systems, yet remains challenging to tune. Here, we coherently drive molecular vibrations with midinfrared pulses in two organic …
View article: Symmetry-protected electronic metastability in an optically driven cuprate ladder
Symmetry-protected electronic metastability in an optically driven cuprate ladder Open
View article: Author Correction: Observation of polarization density waves in SrTiO3
Author Correction: Observation of polarization density waves in SrTiO3 Open
View article: Beyond-Hubbard Pairing in a Cuprate Ladder
Beyond-Hubbard Pairing in a Cuprate Ladder Open
The Hubbard model is believed to capture the essential physics of cuprate superconductors. However, recent theoretical studies suggest that it fails to reproduce a robust and homogeneous superconducting ground state. Here, using resonant i…
View article: Photo-generated charge-transfer excitons in NiO revealed by ultrafast time-resolved resonant inelastic x-ray scattering
Photo-generated charge-transfer excitons in NiO revealed by ultrafast time-resolved resonant inelastic x-ray scattering Open
Strong electronic correlation can lead to insulating behavior and to the opening of large optical gaps, even in materials with partly filled valence shells. Although the non-equilibrium optical response encodes both local (quasi atomic) an…
View article: Magnetic excitations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Nd</mml:mi><mml:mrow><mml:mi>n</mml:mi><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mi>n</mml:mi></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mi>n</mml:mi><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering
Magnetic excitations in Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering Open
Magnetic interactions are thought to play a key role in the properties of many unconventional superconductors, including cuprates, iron pnictides, and square-planar nickelates. Superconductivity was also recently observed in the bilayer an…
View article: Observation of polarization density waves in SrTiO3
Observation of polarization density waves in SrTiO3 Open
View article: Ultrafast pump-probe phase-randomized tomography
Ultrafast pump-probe phase-randomized tomography Open
Measuring fluctuations in matter’s low-energy excitations is the key to unveiling the nature of the non-equilibrium response of materials. A promising outlook in this respect is offered by spectroscopic methods that address matter fluctuat…
View article: Dispersive Dark Excitons in van der Waals Ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>CrI</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Dispersive Dark Excitons in van der Waals Ferromagnet Open
Spin-flip dark excitons are optical-dipole-forbidden quasiparticles with remarkable potential in optoelectronics, especially when they are realized within cleavable van der Waals materials. Despite this potential, dark excitons have not ye…
View article: Beyond-Hubbard pairing in a cuprate ladder
Beyond-Hubbard pairing in a cuprate ladder Open
The Hubbard model is believed to capture the essential physics of cuprate superconductors. However, recent theoretical studies suggest that it fails to reproduce a robust and homogeneous superconducting ground state. Here, using resonant i…
View article: Dispersive dark excitons in van der Waals ferromagnet CrI3
Dispersive dark excitons in van der Waals ferromagnet CrI3 Open
Spin-flip dark excitons are optical-dipole-forbidden quasiparticles with remarkable potential in optoelectronics, especially when they are realized within cleavable van der Waals materials. Despite this potential, dark excitons have not ye…
View article: Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering Open
Understanding quantum materials—solids in which interactions among constituent electrons yield a great variety of novel emergent quantum phenomena—is a forefront challenge in modern condensed matter physics. This goal has driven the invent…
View article: Ultrafast pump-probe phase-randomized tomography
Ultrafast pump-probe phase-randomized tomography Open
Measuring fluctuations in matter's low energy excitations is the key to unveil the nature of the nonequilibrium response of materials. A promising outlook in this respect is offered by spectroscopic methods that address matter fluctuations…
View article: Theory of topological exciton insulators and condensates in flat Chern bands
Theory of topological exciton insulators and condensates in flat Chern bands Open
Excitons are the neutral quasiparticles that form when Coulomb interactions create bound states between electrons and holes. Due to their bosonic nature, excitons are expected to condense and exhibit superfluidity at sufficiently low tempe…
View article: Magnetically propagating Hund’s exciton in van der Waals antiferromagnet NiPS3
Magnetically propagating Hund’s exciton in van der Waals antiferromagnet NiPS3 Open
Magnetic van der Waals (vdW) materials have opened new frontiers for realizing novel many-body phenomena. Recently NiPS 3 has received intense interest since it hosts an excitonic quasiparticle whose properties appear to be intimately link…
View article: Witnessing Quantum Entanglement Using Resonant Inelastic X-ray Scattering
Witnessing Quantum Entanglement Using Resonant Inelastic X-ray Scattering Open
Although entanglement is both a central ingredient in our understanding of quantum many-body systems and an essential resource for quantum technologies, we only have a limited ability to quantify entanglement in real quantum materials. Thu…
View article: Observation of polarization density waves in SrTiO3
Observation of polarization density waves in SrTiO3 Open
The nature of the "failed" ferroelectric transition in SrTiO3 has been a long-standing puzzle in condensed matter physics. A compelling explanation is the competition between ferroelectricity and an instability with a mesoscopic modulation…
View article: Phonon state tomography of electron correlation dynamics in optically excited solids
Phonon state tomography of electron correlation dynamics in optically excited solids Open
We introduce phonon state tomography (PST) as a diagnostic probe of electron dynamics in solids whose phonons are optically excited by a laser pulse at initial time. Using a projected-purified matrix-product states algorithm, PST decompose…
View article: Theory of topological exciton insulators and condensates in flat Chern bands
Theory of topological exciton insulators and condensates in flat Chern bands Open
Excitons are the neutral quasiparticles that form when Coulomb interactions create bound states between electrons and holes. Due to their bosonic nature, excitons are expected to condense and exhibit superfluidity at sufficiently low tempe…
View article: Pines’ demon observed as a 3D acoustic plasmon in Sr2RuO4
Pines’ demon observed as a 3D acoustic plasmon in Sr2RuO4 Open
View article: Witnessing light-driven entanglement using time-resolved resonant inelastic X-ray scattering
Witnessing light-driven entanglement using time-resolved resonant inelastic X-ray scattering Open
View article: Witnessing Nonequilibrium Entanglement Dynamics in a Strongly Correlated Fermionic Chain
Witnessing Nonequilibrium Entanglement Dynamics in a Strongly Correlated Fermionic Chain Open
Many-body entanglement in condensed matter systems can be diagnosed from equilibrium response functions through the use of entanglement witnesses and operator-specific quantum bounds. Here, we investigate the applicability of this approach…
View article: Electronic Character of Charge Order in Square-Planar Low-Valence Nickelates
Electronic Character of Charge Order in Square-Planar Low-Valence Nickelates Open
Charge order is a central feature of the physics of cuprate superconductors and is known to arise from a modulation of holes with primarily oxygen character. Low-valence nickelate superconductors also host charge order, but the electronic …
View article: Anharmonic multiphonon origin of the valence plasmon in SrTi1-xNbxO3
Anharmonic multiphonon origin of the valence plasmon in SrTi1-xNbxO3 Open
Doped SrTi1-xNbxO3 exhibits superconductivity and a mid-infrared optical response reminiscent of copper-oxide superconductors. Strangely, its plasma frequency, omega_p, increases by a factor of ~3 when cooling from 300 K to 20 K, without a…
View article: Witnessing Light-Driven Entanglement using Time-Resolved Resonant Inelastic X-Ray Scattering
Witnessing Light-Driven Entanglement using Time-Resolved Resonant Inelastic X-Ray Scattering Open
Characterizing and controlling entanglement in quantum materials is crucial for the development of next-generation quantum technologies. However, defining a quantifiable figure of merit for entanglement in macroscopic solids is theoretical…
View article: Witnessing nonequilibrium entanglement dynamics in a strongly correlated fermionic chain
Witnessing nonequilibrium entanglement dynamics in a strongly correlated fermionic chain Open
Many-body entanglement in condensed matter systems can be diagnosed from equilibrium response functions through the use of entanglement witnesses and operator-specific quantum bounds. Here, we investigate the applicability of this approach…
View article: Incommensurate magnetic orders and topological Hall effect in the square-net centrosymmetric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>EuGa</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>Al</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math> system
Incommensurate magnetic orders and topological Hall effect in the square-net centrosymmetric system Open
Neutron diffraction on the centrosymmetric square-net magnet EuGa2Al2 reveals multiple incommensurate magnetic states (AFM1, 2, 3) in zero field. In applied field, a new magnetic phase (A) is identified from magnetiza…