Publications related to Spin, Charge, and ?-Spin Separation in One-Dimensional Photodoped Mott Insulators

Fermionic wave functions from neural-network constrained hidden states

We introduce a systematically improvable family of variational wave functions for the simulation of strongly correlated fermionic systems. This family consists of Slater determinants in an augmented Hilbert space involving “hidden” additional fermionic deg ...

2022

Spinor GW /Bethe-Salpeter calculations in BerkeleyGW: Implementation, symmetries, benchmarking, and performance

Oleg Yazyev, Manish Jain

Computing the GW quasiparticle band structure and Bethe-Salpeter equation (BSE) absorption spectra for materials with spin-orbit coupling have commonly been done by treating GW corrections and spin-orbit coupling (SOC) as separate perturbations to density- ...

AMER PHYSICAL SOC2022

HP - A code for the calculation of Hubbard parameters using density-functional perturbation theory

Nicola Marzari, Iurii Timrov, Matteo Cococcioni

We introduce HP, an implementation of density-functional perturbation theory, designed to compute Hubbard parameters (on-site U and inter-site V ) in the framework of DFT+U and DFT+U+V. The code does not require the use of computationally expensive superce ...

ELSEVIER2022

Ab Initio Electron-Phonon Interactions in Correlated Electron Systems

Nicola Marzari, Iurii Timrov, Matteo Cococcioni, Andrea Floris

Electron-phonon (e-ph) interactions are pervasive in condensed matter, governing phenomena such as transport, superconductivity, charge-density waves, polarons, and metal-insulator transitions. First-principles approaches enable accurate calculations of e- ...

AMER PHYSICAL SOC2021

Visualizing the multifractal wave functions of a disordered two-dimensional electron gas

Klaus Kern

The wave functions of a disordered two-dimensional electron gas at the quantum-critical Anderson transition are predicted to exhibit multifractal scaling in their real space amplitude. We experimentally investigate the appearance of these characteristics i ...

AMER PHYSICAL SOC2021

Mahan excitons in room-temperature methylammonium lead bromide perovskites

Majed Chergui, László Forró, Endre Horvath, Ana Akrap, Edoardo Baldini, Márton Kollár, Tania Palmieri

In a seminal paper, Mahan predicted that excitonic bound states can still exist in a semiconductor at electron-hole densities above the insulator-to-metal Mott transition. However, no clear evidence for this exotic quasiparticle, dubbed Mahan exciton, exis ...

NATURE PUBLISHING GROUP2020

Quantum interference effects of out-of-plane confinement on two-dimensional electron systems in oxides

Emmanouil Frantzeskakis, Ji Dai

It was recently discovered that a conductive, metallic state is formed on the surface of some insulating oxides. First observed on SrTiO3 (001), it was then found in other compounds as diverse as anatase TiO2, KTaO3, BaTiO3, ZnO, and also on different surf ...

2020

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Diego José Pasquier

This thesis is dedicated to the study of various aspects of the electronic structure of two-dimensional transition metal dichalcogenides (TMDs) of chemical composition MX

_2

(where M is a transition metal atom and X= S, Se, Te), using a combination of \te ...

EPFL2019

From quantum spin chains to square lattice Heisenberg anti-ferromagnets

Noore Elahi Shaik

This thesis presents a theoretical study of the Heisenberg model on a two dimensional lattice with asymmetric couplings along x and y directions. By gradually varying the coupling along y-direction we traverse the 1D, quasi 1D and 2D domains of this model. ...

EPFL2019

Magnetic excitations from the two-dimensional interpenetrating Cu framework in Ba2Cu3O4Cl2

Henrik Moodysson Rønnow, Peter Babkevich, Diane Virginie Marie Lançon, Noore Elahi Shaik, Mechthild Enderle

We report detailed neutron scattering studies on Ba2Cu3O4Cl2. The compound consists of two interpenetrating sublattices of Cu, labeled as Cu-A and Cu-B, each of which forms a square-lattice Heisenberg antiferromagnet. The two sublattices order at different ...

Amer Physical Soc2017

Spin, Charge, and ?-Spin Separation in One-Dimensional Photodoped Mott Insulators

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Fermionic wave functions from neural-network constrained hidden states

Spinor GW /Bethe-Salpeter calculations in BerkeleyGW: Implementation, symmetries, benchmarking, and performance

HP - A code for the calculation of Hubbard parameters using density-functional perturbation theory

Ab Initio Electron-Phonon Interactions in Correlated Electron Systems

Visualizing the multifractal wave functions of a disordered two-dimensional electron gas

Mahan excitons in room-temperature methylammonium lead bromide perovskites

Quantum interference effects of out-of-plane confinement on two-dimensional electron systems in oxides

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

From quantum spin chains to square lattice Heisenberg anti-ferromagnets

Magnetic excitations from the two-dimensional interpenetrating Cu framework in Ba2Cu3O4Cl2

HP - A code for the calculation of Hubbard parameters using density-functional perturbation theory

Fermionic wave functions from neural-network constrained hidden states

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

From quantum spin chains to square lattice Heisenberg anti-ferromagnets

Spinor GW /Bethe-Salpeter calculations in BerkeleyGW: Implementation, symmetries, benchmarking, and performance

Visualizing the multifractal wave functions of a disordered two-dimensional electron gas

Quantum interference effects of out-of-plane confinement on two-dimensional electron systems in oxides

Ab Initio Electron-Phonon Interactions in Correlated Electron Systems

Mahan excitons in room-temperature methylammonium lead bromide perovskites

Magnetic excitations from the two-dimensional interpenetrating Cu framework in Ba2Cu3O4Cl2