Ci gaba a cikin Binciken Material Mai Girma Biyu da Kimiyya Ya Bayyana!

Moiré superlatices ginshiƙai ne na lokaci-lokaci ta hanyar ƴan ƙanƙanta ƙaura tsakanin lattice biyu ko fiye da haka. A cikin waɗannan moiré superlatices, ana iya yin tasiri sosai kan halayen lantarki, wanda ke haifar da jahohin da ba na al'ada ba kamar su masu sanya ido na Hall Hall. Koyaya, cimma moiré superlatices a ƙananan kusurwoyi masu murzawa ya kasance ƙalubale ga wasu kayan. Wannan yana da mahimmanci don fahimta da yin amfani da tasirin haɗin gwiwar lantarki, kamar yadda haɗin gwiwar lantarki yakan bayyana mafi girma a ƙananan kusurwoyi masu murdawa. Koyaya, saboda matsalolin gwaji, binciken ƙaƙƙarfan alaƙa a cikin waɗannan tsarin ya fi mayar da hankali kan takamaiman kusurwoyi masu karkata ko manyan ɓarna na tsaka-tsaki, rashin tsari da bincike.

Da yake jawabi ga wannan ƙalubale, Farfesa Benjamin E. Feldman da tawagarsa na bincike a Jami'ar Stanford sun wallafa wata takarda ta bincike kwanan nan mai suna "Mapping twist-tuned multiband topology in bilayer WSe2" a cikin mujallar "Science." Masanan kimiyyar sun ƙirƙiri wani tsarin murɗaɗɗen kusan 1.23° a cikin bilayer tungsten diselenide kuma sun yi ma'aunin ma'auni na lantarki na gida ta hanyar amfani da na'urar gani ta atomatik na lantarki. Sun gano kasancewar makada masu yawa a kusa da wannan takamaiman kusurwar karkatacciyar hanya, suna baje kolin ɗimbin insulators na ƙididdigewa. Ta hanyar amfani da filin lantarki na gida, sun kuma sami nasarar haifar da juzu'in juzu'i na juzu'i. Wannan binciken yana magance ƙalubalen cimmawa da kuma nazarin moiré superlattices a ƙananan kusurwoyi masu karkatarwa, yana ba da dandamali mai ƙarfi don ƙarin bincike na hulɗar tsakanin ƙaƙƙarfan alaƙa da kaddarorin topological.