Hoʻomaka i ka ʻimi noiʻi waiwai ʻelua i wehe ʻia e ka ʻepekema!

ʻO ka Moiré superlattices he mau hanana manawa i hoʻokumu ʻia e nā neʻe liʻiliʻi ma waena o ʻelua a ʻoi aʻe paha nā lattices ʻelua. I loko o kēia mau moiré superlattices, hiki ke hoʻoikaika nui ʻia ke ʻano uila, e hoʻāla ana i nā mokuʻāina kūʻokoʻa e like me quantum Hall insulators. Eia nō naʻe, he paʻakikī ka loaʻa ʻana o ka moiré superlattices ma nā kihi wili liʻiliʻi no kekahi mau mea. He mea koʻikoʻi kēia no ka hoʻomaopopo ʻana a me ka hoʻohana ʻana i nā hopena hoʻoponopono electron, no ka mea, ʻike pinepine ʻia ka hoʻoponopono electron ma nā kihi wili liʻiliʻi. Eia nō naʻe, ma muli o nā pilikia hoʻokolohua, ʻo ke aʻo ʻana i ka hoʻopili ikaika ʻana i kēia mau ʻōnaehana ua kālele nui ʻia i nā kihi wili kūikawā a i ʻole nā ​​​​pilikia interlayer nui, nele i ka mana ʻōnaehana a me ka hoʻokolokolo.

Ma ka pane ʻana i kēia pilikia, ua paʻi ʻo Polofesa Benjamin E. Feldman a me kāna hui noiʻi ma ke Kulanui ʻo Stanford i kahi pepa noiʻi hou i kapa ʻia ʻo "Mapping twist-tuned multiband topology in bilayer WSe2" ma ka puke pai "Science." Ua hana nā ʻepekema i kahi ʻano wili ʻia ma kahi o 1.23° i ka bilayer tungsten diselenide a hana i nā ana hoʻopili uila kūloko me ka scanning single-electron transistor microscope. Ua ʻike lākou i ka loaʻa ʻana o nā hui topological lehulehu kokoke i kēia kihi twist kikoʻī, e hōʻike ana i kahi ʻano o nā insulators Hall anomalous quantum. Ma ke noi ʻana i kahi kahua uila kūloko, ua hoʻokō maikaʻi lākou i ka hoʻololi ʻana o ka pae kuantum topological. Hoʻopuka kēia haʻawina i ka paʻakikī o ka loaʻa ʻana a me ke aʻo ʻana i nā moiré superlattices ma nā kihi wili liʻiliʻi, e hāʻawi ana i kahi kahua ikaika no ka ʻimi hou ʻana i ka pilina ma waena o nā correlations ikaika a me nā waiwai topological.