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Akademický článek
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Interactions have strong effects in systems with flat bands. We examine the role of Coulomb interactions in two dimensional chiral anisotropic quasiparticles that disperse linearly in one direction and have relatively flat bands near the neutrality p
Externí odkaz:
http://arxiv.org/abs/2410.22572
Autor:
Uchôa, E. S., Lima, W. P., Sena, S. H. R., Chaves, A. J. C., Pereira Jr., J. M., da Costa, D. R.
We investigate the electronic properties of nanoribbons made out of monolayer Lieb, transition, and kagome lattices using the tight-binding model with a generic Hamiltonian. It allows us to map the evolutionary stages of the interconvertibility proce
Externí odkaz:
http://arxiv.org/abs/2408.15764
Autor:
Gunawardana, K. G. S. H., Uchoa, Bruno
Publikováno v:
Phys. Rev. B 110, 054207 August 28 2024
Disorder free many-body localization (MBL) can occur in interacting systems that can dynamically generate their own disorder. We address the thermal-MBL phase transition of two isotropic Heisenberg spin chains that are quasi-periodically coupled to e
Externí odkaz:
http://arxiv.org/abs/2405.04516
This paper investigates the shift in crowdsourcing towards self-managed enterprises of crowdworkers (SMECs), diverging from traditional platform-controlled models. It reviews the literature to understand the foundational aspects of this shift, focusi
Externí odkaz:
http://arxiv.org/abs/2403.12769
Akademický článek
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Publikováno v:
PNAS 121, e2401644121 (2024)
Excitons are the neutral quasiparticles that form when Coulomb interactions create bound states between electrons and holes. Due to their bosonic nature, excitons are expected to condense and exhibit superfluidity at sufficiently low temperatures. In
Externí odkaz:
http://arxiv.org/abs/2311.04970
Publikováno v:
Phys. Rev. B 110, L121123 (2024)
Twisted bilayer graphene near the magic angle is known to have a cascade of insulating phases at integer filling factors of the low-energy bands. In this Letter we address the nature of these phases through an unrestricted, large-scale Hartree-Fock c
Externí odkaz:
http://arxiv.org/abs/2308.03843
Autor:
Chen, Jin, Guo, Xuefei, Boyd, Christian, Bettler, Simon, Kengle, Caitlin, Chaudhuri, Dipanjan, Hoveyda, Farzaneh, Husain, Ali, Schneeloch, John, Gu, Genda, Phillips, Philip, Uchoa, Bruno, Chiang, Tai-Chang, Abbamonte, Peter
The density fluctuation spectrum captures many fundamental properties of strange metals. Using momentum-resolved electron energy-loss spectroscopy (M-EELS), we recently showed that the density response of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x
Externí odkaz:
http://arxiv.org/abs/2306.03681
Autor:
de Faria, Ana Cláudia Akemi Matsuki, Bastos, Felype de Castro, da Silva, José Victor Nogueira Alves, Fabris, Vitor Lopes, Uchoa, Valeska de Sousa, Neto, Décio Gonçalves de Aguiar, Santos, Claudio Filipi Goncalves dos
Visual Question Answering (VQA) is an emerging area of interest for researches, being a recent problem in natural language processing and image prediction. In this area, an algorithm needs to answer questions about certain images. As of the writing o
Externí odkaz:
http://arxiv.org/abs/2305.11033