Orbital Mott transition in two dimensional pyrochlore lattice

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 high...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2020-06, Vol.32 (25), p.255601-255601
Main Authors: Saket, Abhinav, Tiwari, Rajarshi
Format: Article
Language:English
Subjects:
Monte Carlo
orbital Mott transition
pyrochlore lattice
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Summary: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 Tcorr/t peaked at ≈0.2 around U/t ≈ 6. The optical conductivity shows unusual two peak feature due to two dimensional pyrochlore lattice.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab7a4b