159 citations · 764 across the 31 of their papers we have counts for
13 papers · 1 filter
Frustrated hopping from orbital decoration of a primitive two-dimensional lattice
Aravind Devarakonda, Christie S. Koay, Daniel G. Chica +18
Materials hosting flat electronic bands are a central focus of condensed matter physics as promising venues for novel electronic ground states. Two-dimensional (2D) geometrically f…
Why Charge Added Using Transition Metals To Some Insulators -- Including LK-99 -- Localizes and Does Not Yield a Metal
Alexandru B. Georgescu
While adding charge to semiconductors via dopants is a well-established method for tuning electronic properties, we demonstrate that introducing transition metal impurities into ce…
Coupling of Magnetic Phases at Nickelate Interfaces
C. Domínguez, J. Fowlie, A. B. Georgescu +9
In this work we present a model system built out of artificially layered materials, allowing us to understand the interrelation of magnetic phases with that of the metallic-insulat…
Trigonal Symmetry Breaking and its Electronic Effects in Two-Dimensional Dihalides and Trihalides
Alexandru B. Georgescu, Andrew J. Millis, James M. Rondinelli
We study the consequences of the approximately trigonal () point symmetry of the transition metal (M) site in two-dimensional van der Waals MX dihalides and MX trih…
Energy Landscape analysis of metal-insulator transitions: theory and application to CaRuO, NiO and their heterostructures
Alexandru B. Georgescu, Andrew J. Millis
We present a general methodology that enables the disentanglement of the electronic and lattice contributions to the metal-insulator transition by building an energy landscape from…
Optical properties of LaNiO3 films tuned from compressive to tensile strain
I. Ardizzone, M. Zingl, J. Teyssier +11
Materials with strong electronic correlations host remarkable -- and technologically relevant -- phenomena such as magnetism, superconductivity and metal-insulator transitions. Har…
Boson Slave Solver (BoSS) v1.1
Alexandru B. Georgescu, Minjung Kim, Sohrab Ismail-Beigi
Accurate and computationally efficient modeling of systems of interacting electrons is an outstanding problem in theoretical and computational materials science. For materials wher…
Length-scales of interfacial coupling between metal-insulator phases in oxides
Claribel Domínguez, Alexandru B. Georgescu, Bernat Mundet +10
Controlling phase transitions in transition metal oxides remains a central feature of both technological and fundamental scientific relevance. A well-known example is the metal-ins…
Disentangling lattice and electronic contributions to the metal-insulator transition from bulk vs. layer confined RNiO
Alexandru B. Georgescu, Oleg E. Peil, Ankit Disa +2
In complex oxide materials, changes in electronic properties are often associated with changes in crystal structure, raising the question of the relative roles of the electronic an…
Control of hidden ground-state order in NdNiO superlattices
Ankit S. Disa, Alexandru B. Georgescu, James L. Hart +8
The combination of charge and spin degrees of freedom with electronic correlations in condensed matter systems leads to a rich array of phenomena, such as magnetism, superconductiv…
Confinement of magnetism in atomically-thin / heterostructures
Sanaz Koohfar, Alexandru Bogdan Georgescu, Aubrey Penn +3
At crystalline interfaces where a valence mismatch exists, electronic and structural interactions may occur to relieve the polar mismatch leading to the stabilization of non-bulkli…
Symmetry Breaking in Occupation Number Based Slave-Particle Methods
Alexandru B. Georgescu, Sohrab Ismail-Beigi
We describe a theoretical approach for finding spontaneously symmetry-broken electronic phases due to strong electronic interactions when using recently developed slave-particle (s…
Generalized slave-particle method for extended Hubbard models
Alexandru B. Georgescu, Sohrab Ismail-Beigi
We introduce a set of generalized slave-particle models for extended Hubbard models that treat localized electronic correlations using slave-boson decompositions. Our models automa…