Work

Orbital Mott transition in two dimensional pyrochlore lattice

Year: 2020

Type: article

Abstract: We study orbital Mott transition in two dimensional pyrochlore lattice, using a two orbital Hubbard model with only inter-orbital electronic hopping. We use a real space Monte Carlo based approach to study the model at finite temperature, and establish temperature-interaction phase diagram that highlights the Mott transition, orbital ordering, and spectral trends, and possible window of pseudogap. Due to only inter-orbital hopping, the Mott insulator ‘generates’ ferro exchange resulting in ferro-orbital ordering, with T corr / t peaked at ≈0.2 around U / t ≈ 6. The optical conductivity shows unusual two peak feature due to two dimensional pyrochlore lattice.

Source: Journal of Physics Condensed Matter

DOI: 10.1088/1361-648x/ab7a4b

Authors: Abhinav Saket, Rajarshi Tiwari

Institution: Trinity College Dublin

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Science Foundation Ireland, Irish Centre for High-End Computing, Quest High Performance Computing

Award: G4617389043