Publications (25)
Unveiling New Magnetic Phases of Undoped and Doped Manganites
Takashi Hotta, Mohammad Moraghebi, Adrian Feiguin +3
Novel ground-state spin structures in undoped and lightly-doped manganites are here investigated based on the orbital-degenerate double-exchange model, by using mean-field and nume…
Unconventional field induced phases in a quantum magnet formed by free radical tetramers
Andres Saul, Nicolas Gauthier, Reza Moosavi Askari +11
We report experimental and theoretical studies on the magnetic and thermodynamic properties of NIT-2Py, a free radical-based organic magnet. From magnetization and specific heat me…
The fate of pairing and spin-charge separation in the presence of long-range antiferromagnetism
Luhang Yang, Ignacio Hamad, Luis O. Manuel +1
We present a numerical study of competing orders in the 1D - model with long-range RKKY-like staggered spin interactions. By circumventing the constraints imposed by Mermin-W…
Anisotropy-induced ordering in the quantum J1-J2 antiferromagnet
Tommaso Roscilde, Adrian Feiguin, Alexander L. Chernyshev +2
We study the effect of spin anisotropies on a frustrated quantum antiferromagnet using the J_1-J_2^{XXZ} model on the square lattice. The T=0 and finite-T phase diagrams of this mo…
3D Heisenberg universality in the Van der Waals antiferromagnet NiPS
Rajan Plumley, Sougata Mardanya, Cheng Peng +20
Van der Waals (vdW) magnetic materials are comprised of layers of atomically thin sheets, making them ideal platforms for studying magnetism at the two-dimensional (2D) limit. Thes…
Capturing dynamical correlations using implicit neural representations
Sathya Chitturi, Zhurun Ji, Alexander Petsch +16
The observation and description of collective excitations in solids is a fundamental issue when seeking to understand the physics of a many-body system. Analysis of these excitatio…
Neural network representation for minimally entangled typical thermal states
Douglas Hendry, Hongwei Chen, Adrian Feiguin
Minimally entangled typical thermal states (METTS) are a construction that allows one to to solve for the imaginary time evolution of quantum many body systems. By using wave funct…
Qubit-photon corner states in all dimensions
Adrian Feiguin, Juan Jose Garcia-Ripoll, Alejandro Gonzalez-Tudela
A single quantum emitter coupled to a one-dimensional photon field can perfectly trap a photon when placed close to a mirror. This occurs when the interference between the emitted…
Non-equilibrium transport through a point contact in the non-Abelian quantum Hall state
Adrian Feiguin, Paul Fendley, Matthew P. A. Fisher +1
We analyze charge- quasiparticle tunneling between the edges of a point contact in a non-Abelian model of the quantum Hall state. We map this problem to resonant tunn…
Explanation of Giant Cluster Coexistence in Doped Manganites and Other Compounds
Adriana Moreo, Matthias Mayr, Adrian Feiguin +2
Computational studies show the generation of large coexisting metallic and insulating clusters with equal electronic density in models for manganites. The clusters are induced by d…
Collective states of interacting Fibonacci anyons
Simon Trebst, Eddy Ardonne, Adrian Feiguin +3
We show that chains of interacting Fibonacci anyons can support a wide variety of collective ground states ranging from extended critical, gapless phases to gapped phases with grou…
Skyrmions: A review on materials perspective for future electronic devices
Vineet Kumar Sharma, Alana Okullo, Jalen Garner +7
Recent years have witnessed an enormous rise in research interest in magnetic skyrmions owing to their capability to improve over contemporary spintronic devices. An overview of th…
Ferromagnetism and doublon localization in a Wannier-Hubbard chain
Samuel Milner, Phillip Weinberg, Adrian Feiguin
We derive a "Wannier-Hubbard" model consisting of an array of overlapping atomic orbitals interacting via a local Coulomb interaction. Transforming to an orthogonal Wannier basis s…
One-dimensional itinerant interacting non-Abelian anyons
Didier Poilblanc, Adrian Feiguin, Matthias Troyer +2
We construct models of interacting itinerant non-Abelian anyons moving along one-dimensional chains. We focus on itinerant Ising (Majorana) and Fibonacci anyons, which are, respect…
Interacting anyons in topological quantum liquids: The golden chain
Adrian Feiguin, Simon Trebst, Andreas W. W. Ludwig +4
We discuss generalizations of quantum spin Hamiltonians using anyonic degrees of freedom. The simplest model for interacting anyons energetically favors neighboring anyons to fuse…
How to find conductance tensors of quantum multi-wire junctions through static calculations: application to an interacting Y-junction
Armin Rahmani, Chang-Yu Hou, Adrian Feiguin +2
Conductance is related to dynamical correlation functions which can be calculated with \textit{time-dependent} methods. Using boundary conformal field theory, we relate the conduct…
On Ultrafast X-ray Methods for Magnetism
Rajan Plumley, Sathya Chitturi, Cheng Peng +36
With the introduction of x-ray free electron laser sources around the world, new scientific approaches for visualizing matter at fundamental length and time-scales have become poss…
Kernel Fusion in Atomistic Spin Dynamics Simulations on Nvidia GPUs using Tensor Core
Hongwei Chen, Shiyang Chen, Joshua J. Turner +1
In atomistic spin dynamics simulations, the time cost of constructing the space- and time-displaced pair correlation function in real space increases quadratically as the number of…
Auger spectroscopy beyond the ultra-short core-hole relaxation time approximation
Alberto Nocera, Adrian Feiguin
We present a time-dependent computational approach to study Auger electron spectroscopy (AES) beyond the ultra-short core-hole relaxation time approximation and, as a test case, we…
Resistivity of Mixed-Phase Manganites
Matthias Mayr, Adriana Moreo, Jose A. Verges +3
The resistivity of manganites is studied using a random-resistor-network, based on phase-separation between metallic and insulating domains. When percolation occurs, both…
A High-Performance Implementation of Atomistic Spin Dynamics Simulations on x86 CPUs
Hongwei Chen, Yujia Zhai, Joshua J. Turner +1
Atomistic spin dynamics simulations provide valuable information about the energy spectrum of magnetic materials in different phases, allowing one to identify instabilities and the…
Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2
Marcelo Jaime, Ramzy Daou, Scott A. Crooker +6
Strong geometrical frustration in magnets leads to exotic states, such as spin liquids, spin supersolids and complex magnetic textures. SrCu2(BO3)2, a spin-1/2 Heisenberg antiferro…
Band mixing effects in one-dimensional charge transfer insulators
Samuel Milner, Steven Johnston, Adrian Feiguin
The low-energy properties of transition metal oxides (TMOs) are governed by the electrons occupying strongly correlated -orbitals that are hybridized with surrounding ligand oxy…
Stripes Induced by Orbital Ordering in Layered Manganites
Takashi Hotta, Adrian Feiguin, Elbio Dagotto
Spin-charge-orbital ordered structures in doped layered manganites are investigated using an orbital-degenerate double-exchange model tightly coupled to Jahn-Teller distortions. In…
General method for calculating the universal conductance of strongly correlated junctions of multiple quantum wires
Armin Rahmani, Chang-Yu Hou, Adrian Feiguin +3
We develop a method to extract the universal conductance of junctions of multiple quantum wires, a property of systems connected to reservoirs, from static ground-state computation…