Kubudirira muTwo-dimensional Material Tsvagiridzo Yakafumurwa neSainzi!

Moiré superlattices zvimiro zvenguva nenguva zvinoumbwa nediki diki rekutamisa pakati pemaviri kana anopfuura maviri-dimensional lattices. Mune idzi moiré superlattices, maitiro emagetsi anogona kupesvedzerwa zvakanyanya, zvichipa mamiriro asina kujairika senge quantum Hall insulators. Nekudaro, kuwana moiré superlattices pamakona madiki twist kunoramba kuri dambudziko kune zvimwe zvinhu. Izvi zvakakosha pakunzwisisa uye kushandisa maerekitironi correlation mhedzisiro, sezvo maerekitironi kuwirirana kunowanzo ratidza zvakanyanya padiki twist angles. Nekudaro, nekuda kwekuomerwa kwekuyedza, chidzidzo chekubatana kwakasimba mumasisitimu aya kwakanyanya kunangana nemakona ekumonyorora kana mahombe interlayer kukanganisa, kushaya kudzora kwakarongeka uye kuongorora.

Vachitaura nezvedambudziko iri, Muzvinafundo Benjamin E. Feldman nechikwata chake chekutsvagisa paStanford University vakaburitsa bepa rekutsvagisa richangoburwa rakanzi "Mapping twist-tuned multiband topology in bilayer WSe2" mujenari "Science." Masayendisiti akagadzira chimiro chakamonyoroka chinosvika 1.23 ° mubilayer tungsten diselenide uye vakaita zviyero zvemagetsi zvemagetsi zvemagetsi vachishandisa scanning single-electron transistor microscope. Vakaona kuvepo kwemabhendi akawanda epamusoro padhuze neiyi chaiyo twist angle, achiratidza nhevedzano ye quantum anomalous Hall insulators. Nekushandisa nzvimbo yemagetsi yemuno, ivo vakabudirirawo kupinza topological quantum phase transition. Ichi chidzidzo chinotarisana nedambudziko rekuwana uye kudzidza moiré superlattices pamakona madiki akamonyoroka, ichipa chikuva chakasimba chekuenderera mberi nekuongorora kwekudyidzana pakati pehukama hwakasimba uye topological properties.