Kupambana Kwambiri mu Kafukufuku Wazinthu Awiri Wovumbulutsidwa ndi Sayansi!

Ma Moiré superlattice ndi zinthu zanthawi ndi nthawi zomwe zimapangidwa ndi kusuntha ting'onoting'ono pakati pa timizere tiwiri kapena kupitilira apo. M'mawonekedwe apamwambawa a moiré, machitidwe apakompyuta amatha kukhudzidwa kwambiri, zomwe zimapangitsa kuti pakhale mayiko osagwirizana ndi ma quantum Hall insulators. Komabe, kupeza ma moiré superlattices pamakona ang'onoang'ono opindika kumakhalabe kovuta pazinthu zina. Izi ndizofunikira pakumvetsetsa ndikugwiritsa ntchito ma electron kugwirizanitsa, chifukwa kugwirizanitsa ma elekitironi nthawi zambiri kumawonekera kwambiri pamakona ang'onoang'ono opindika. Komabe, chifukwa cha zovuta zoyesera, kafukufuku wokhudzana kwambiri ndi machitidwewa amayang'ana kwambiri ma angles opotoka kapena kupotoza kwakukulu kwa interlayer, kusowa kuwongolera mwadongosolo ndi kufufuza.

Pothana ndi vutoli, Pulofesa Benjamin E. Feldman ndi gulu lake lofufuza pa yunivesite ya Stanford asindikiza pepala lofufuza laposachedwa lotchedwa "Mapping twist-tuned multiband topology in bilayer WSe2" m'magazini "Sayansi." Asayansiwa adapanga zopotoka pafupifupi 1.23 ° mu bilayer tungsten diselenide ndipo adayesa miyeso yamagetsi yakumaloko pogwiritsa ntchito microscope ya single-electron transistor microscope. Adapeza kukhalapo kwa magulu angapo a topological pafupi ndi ngodya iyi yopindika, kuwonetsa ma insulators a quantum anomalous Hall. Pogwiritsa ntchito malo amagetsi am'deralo, adayambitsanso kusintha kwa gawo la topological quantum. Kafukufukuyu akukumana ndi vuto lokwaniritsa ndi kuphunzira ma moiré superlattice pamakona ang'onoang'ono opindika, ndikupereka nsanja yamphamvu yowunikiranso kugwirizana pakati pa kulumikizana kwamphamvu ndi zinthu zakuthambo.