Kev Tshawb Fawb Txog Kev Tshawb Fawb Ob-dimensional nthuav tawm los ntawm Kev Tshawb Fawb!

Moiré superlattices yog cov qauv ntu uas tsim los ntawm qhov chaw me me ntawm ob lossis ntau qhov lattices. Hauv cov moiré superlattices, cov cwj pwm hluav taws xob tuaj yeem cuam tshuam tau zoo, ua rau muaj kev tsis sib haum xeeb xws li quantum Hall insulators. Txawm li cas los xij, kev ua tiav moiré superlattices ntawm qhov sib tw me me tseem yog qhov nyuaj rau qee yam khoom siv. Qhov no yog qhov tseem ceeb rau kev nkag siab thiab siv cov kev cuam tshuam ntawm electron correlation, vim electron correlation feem ntau manifests feem ntau prominently ntawm me me twist kaum. Txawm li cas los xij, vim muaj kev sim nyuaj, kev kawm txog kev sib raug zoo hauv cov kab ke no tau tsom mus rau qhov tshwj xeeb twist lub kaum ntse ntse lossis loj interlayer distortions, tsis muaj kev tswj xyuas thiab kev tshawb nrhiav.

Hais txog qhov kev sib tw no, xibfwb Benjamin E. Feldman thiab nws pab neeg tshawb fawb ntawm Stanford University tau luam tawm cov ntaub ntawv tshawb fawb tsis ntev los no hu ua "Mapping twist-tuned multiband topology hauv bilayer WSe2" hauv phau ntawv journal "Science." Cov kws tshawb fawb tau tsim cov qauv sib tw ntawm kwv yees li 1.23 ° hauv bilayer tungsten diselenide thiab ua cov kev ntsuas hluav taws xob hauv zos uas siv lub tshuab hluav taws xob ib leeg-electron transistor microscope. Lawv nrhiav pom muaj ntau lub topological bands nyob ze ntawm qhov tshwj xeeb twist lub kaum ntse ntse, nthuav tawm cov quantum anomalous Hall insulators. Los ntawm kev siv lub chaw hluav taws xob hauv zos, lawv kuj tau ua tiav qhov kev hloov pauv ntawm topological quantum theem. Txoj kev tshawb no hais txog qhov kev sib tw ntawm kev ua tiav thiab kawm moiré superlattices ntawm qhov sib tw me me, muab lub platform muaj zog rau kev tshawb nrhiav ntxiv ntawm kev sib cuam tshuam ntawm kev sib raug zoo thiab cov khoom siv topological.