Bayesian Frequency Estimation on Narrow Bands
Sign Up to like & getrecommendations! Published in 2021 at "IFAC-PapersOnLine"
DOI: 10.1016/j.ifacol.2021.08.343
Abstract: Abstract In some recent works, the authors have proposed and developed an Empirical Bayes framework for frequency estimation. The unknown frequencies in a noisy oscillatory signal are modeled as uniform random variables supported on narrow… read more here.
Keywords: estimation; frequency; bayesian frequency; frequency estimation ... See more keywords
Narrow bands, electrostatic interactions and band topology in graphene stacks
Sign Up to like & getrecommendations! Published in 2021 at "2D Materials"
DOI: 10.1088/2053-1583/ac1b6d
Abstract: The occurrence of superconducting and insulating phases is well-established in twisted graphene bilayers, and they have also been reported in other arrangements of graphene layers. We investigate three such arrangements: untwisted AB bilayer graphene on… read more here.
Keywords: graphene; topology; bands electrostatic; interactions band ... See more keywords
Excitons and narrow bands determine the optical properties of cesium bismuth halides
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.201404
Abstract: We study the optical properties of ${\mathrm{Cs}}_{3}{\mathrm{Bi}}_{2}{\mathrm{I}}_{9}$ nanoplatelets using a combination of first-principles density functional theory, $\mathit{GW}$ plus Bethe-Salpeter equation calculations, and spectroscopic experiments. We show that the material exhibits flat bands and hence high… read more here.
Keywords: determine optical; optical properties; excitons narrow; bands determine ... See more keywords
Strong Coupling Phases of Partially Filled Twisted Bilayer Graphene Narrow Bands.
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DOI: 10.1103/physrevlett.122.246401
Abstract: We identify states favored by Coulomb interactions projected onto the Wannier basis of the four narrow bands of the "magic angle" twisted bilayer graphene. At the filling of 2 electrons/holes per moiré unit cell, such… read more here.
Keywords: strong coupling; bilayer graphene; narrow bands; twisted bilayer ... See more keywords
Ferromagnetism in Narrow Bands of Moiré Superlattices.
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DOI: 10.1103/physrevlett.124.187601
Abstract: Many graphene moiré superlattices host narrow bands with nonzero valley Chern numbers. We provide analytical and numerical evidence for a robust spin and/or valley polarized insulator at total integer band filling in nearly flat bands… read more here.
Keywords: moir superlattices; graphene; valley; band ... See more keywords