A cikin kayan aiki masu ƙarfi, ƙarfin lantarki zai gudana ba tare da wani juriya ba. Akwai wasu 'yan aikace-aikace masu amfani na wannan lamarin; duk da haka, yawancin tambayoyi na asali sun kasance har yanzu ba a amsa ba. Mataimakin Farfesa Justin Ye, shugaban kungiyar na'urar Physics na Complex Materials a Jami'ar Groningen, ya yi nazari a kan superconductivity a cikin nau'i biyu na molybdenum disulfide kuma ya gano sababbin jihohi. An buga sakamakon a cikin mujallar Nature Nanotechnology a ranar 4 ga Nuwamba.

An nuna babban ƙarfin hali a cikin lu'ulu'u na monolayer na, misali, molybdenum disulphide ko tungsten disulfide waɗanda ke da kauri na atom guda uku kawai. "A cikin nau'i biyu na monolayers, akwai nau'i na musamman na superconductivity wanda filin maganadisu na ciki yana kare yanayin da ya fi dacewa daga filayen maganadisu na waje," in ji Ye. Superconductivity na al'ada yana ɓacewa lokacin da aka yi amfani da babban filin maganadisu na waje, amma wannan Ising superconductivity yana da kariya sosai. Ko da a cikin filin magnetic mafi ƙarfi a cikin Turai, wanda ke da ƙarfin 37 Tesla, babban ƙarfin aiki a cikin tungsten disulfide bai nuna wani canji ba. Duk da haka, ko da yake yana da kyau a sami irin wannan kariya mai karfi, kalubale na gaba shine neman hanyar da za a iya sarrafa wannan tasirin kariya, ta hanyar amfani da wutar lantarki.

Sabbin jahohin da ke da iko

Ye da abokan aikinsa sun yi nazarin nau'i biyu na molybdenum disulfide: "A cikin wannan tsarin, hulɗar da ke tsakanin yadudduka biyu yana haifar da sababbin jihohi." Kun ƙirƙiri wani dakafi biyu na dakatarwa, tare da ruwa na ionic a ɓangarorin biyu wanda za'a iya amfani dashi don ƙirƙirar filin lantarki a cikin bilayer. "A cikin mutum guda ɗaya, irin wannan filin zai kasance mai asymmetric, tare da ions masu kyau a gefe ɗaya da kuma zargi mara kyau a ɗayan. Koyaya, a cikin bilayer, za mu iya samun adadin cajin da aka jawo a duka masu monolayers, ƙirƙirar tsarin daidaitacce, ”in ji Ye. Ana iya amfani da filin lantarki wanda aka ƙirƙira don kunnawa da kashewa. Wannan yana nufin cewa an ƙirƙiri transistor mai ɗaukar nauyi wanda za'a iya haɗo shi ta ruwan ionic.

A cikin Layer biyu, Kariyar Ising daga filayen maganadisu na waje yana ɓacewa. "Wannan yana faruwa ne saboda canje-canje a cikin hulɗar tsakanin matakan biyu." Duk da haka, filin lantarki zai iya mayar da kariya. "Matakin kariyar ya zama aikin yadda kuke ƙoƙarin ƙofar na'urar."

Cooper nau'i-nau'i

Baya ga ƙirƙirar transistor mai ɗaukar nauyi, Ye da abokan aikinsa sun yi wani kallo mai ban sha'awa. A cikin 1964, an yi annabta cewa akwai wani yanayi mai girma na musamman, wanda ake kira jihar FFLO (mai suna bayan masana kimiyya waɗanda suka annabta: Fulde, Ferrell, Larkin da Ovchinnikov). A cikin babban ƙarfin hali, electrons suna tafiya bi-biyu a wasu wurare dabam dabam. Tun da suke tafiya a cikin gudu ɗaya, waɗannan nau'ikan Cooper suna da jimlar motsin motsi na sifili. Amma a cikin jihar FFLO, akwai ɗan ƙaramin bambance-bambancen sauri kuma saboda haka motsin motsin ba zero bane. Ya zuwa yanzu, ba a taɓa yin nazarin wannan jihar yadda ya kamata ba a gwaje-gwaje.

"Mun cika kusan dukkanin abubuwan da ake bukata don shirya jihar FFLO a cikin na'urarmu," in ji Ye. "Amma jihar tana da rauni sosai kuma gurɓataccen abu a saman kayanmu yana da tasiri sosai. Za mu, saboda haka, muna buƙatar maimaita gwaje-gwajen tare da samfurori masu tsabta. "

Tare da dakatarwar bilayer na molybdenum disulfide, Ye da masu haɗin gwiwa suna da duk abubuwan da ake buƙata don nazarin wasu jihohi na musamman. "Wannan shine ainihin ilimin kimiyya wanda zai iya kawo mana sauye-sauye na ra'ayi."