Learning quantum phase transitions through topological data analysis

A Tirelli, NC Costa - Physical Review B, 2021 - APS
We implement a computational pipeline based on a recent machine learning technique,
namely, topological data analysis (TDA), that has the capability of extracting powerful …

Emergent coherent lattice behavior in Kondo nanosystems

M Raczkowski, FF Assaad - Physical Review Letters, 2019 - APS
How many magnetic moments periodically arranged on a metallic surface are needed to
generate a coherent Kondo lattice behavior? We investigate this fundamental issue within …

Phase diagram and dynamics of the symmetric Kondo lattice model

M Raczkowski, FF Assaad - Physical Review Research, 2020 - APS
In heavy-fermion systems, the competition between the local Kondo physics and intersite
magnetic fluctuations results in unconventional quantum critical phenomena which are …

Hybridization fluctuations in the half-filled periodic Anderson model

D Hu, JJ Dong, Y Yang - Physical Review B, 2019 - APS
Motivated by recent photoemission and pump-probe experiments, we report determinant
quantum Monte Carlo simulations of hybridization fluctuations in the half-filled periodic …

Local spectroscopies reveal percolative metal in disordered Mott insulators

JC Szabo, K Lee, V Madhavan, N Trivedi - Physical review letters, 2020 - APS
We elucidate the mechanism by which a Mott insulator transforms into a non-Fermi liquid
metal upon increasing disorder at half filling. By correlating maps of the local density of …

Hyperfine couplings as a probe of orbital anisotropy in heavy-fermion materials

P Menegasso, JC Souza, I Vinograd, Z Wang… - Physical Review B, 2021 - APS
Overlap between neighboring atomic wave functions is a central feature of conducting
solids. In heavy-fermion materials, f-electron orbitals in the lattice lie on the boundary …

Competition between Kondo Effect and RKKY Coupling

S Kettemann - arxiv preprint arxiv:2408.03112, 2024 - arxiv.org
When magnetic moments are immersed into the Fermi sea of itinerant electrons, rich
quantum physics emerges. This is relevant for a wide range of materials including heavy …

Magnetic and singlet phases in the three-dimensional periodic Anderson Model

WS Oliveira, T Paiva, RT Scalettar, NC Costa - Physical Review B, 2023 - APS
Heavy-fermion materials are compounds in which localized f orbitals hybridize with
delocalized d ones, leading to quasiparticles with large renormalized masses. The presence …

Determinant quantum Monte Carlo study of exhaustion in the periodic Anderson model

L Zhang, T Ma, NC Costa, RR dos Santos, RT Scalettar - Physical Review B, 2019 - APS
The Kondo and periodic Anderson models describe many of the qualitative features of local
moments coupled to a conduction band, and thereby the physics of materials such as the …

Probing quasiparticle relaxation dynamics in correlated metals

D Barbalas - 2023 - jscholarship.library.jhu.edu
In this thesis, I explore the nonlinear THz response of correlated metals. In noble metals
such as gold or copper, the electronic wavefunction can be roughly approximated by a free …