Superconductivity ke ketsahalo ea 'mele eo ho eona khanyetso ea motlakase ea thepa e theohelang ho zero ka mocheso o itseng o boima.Khopolo ea Bardeen-Cooper-Schrieffer (BCS) ke tlhaloso e sebetsang, e hlalosang superconductivity ka thepa e ngata.E bontša hore Cooper lipara tsa elektronike li thehoa ka kristale lattice ka mocheso ka ho lekaneng tlaase, le hore BCS superconductivity tsoa condensation bona.Le hoja graphene ka boeona e le motlakase o babatsehang oa motlakase, ha e bontše BCS superconductivity ka lebaka la ho hatelloa ha tšebelisano ea electron-phonon.Ke ka lebaka leo li-conductor tse ngata tse "ntle" (tse kang khauta le koporo) e le li-superconductors tse "mpe".
Bafuputsi Setsing sa Theoretical Physics of Complex Systems (PCS) Setsing sa Mahlale a Motheo (IBS, Korea Boroa) ba tlalehile mokhoa o mocha oa ho fihlela superconductivity ka graphene.Ba fihletse mosebetsi ona ka ho sisinya tsamaiso e nyalisitsoeng e entsoeng ka graphene le Bose-Einstein condensate (BEC) ea mahlakore a mabeli.Patlisiso e phatlalalitsoe koranteng ea 2D Materials.
Sistimi e nyalisitsoeng e nang le khase ea elektronike (ka holimo) ka graphene, e arohaneng le "condensate ea mahlakore a mabeli" ea Bose-Einstein, e emeloang ke li-exciton tse sa tobang (likarolo tse putsoa le tse khubelu).Li-electrone le li-exciton tse ho graphene li kopantsoe ke matla a Coulomb.
(a) Ho its'etleha ha mocheso oa lekhalo la superconducting ts'ebetsong ea boholon-mediated ka tokiso ea mocheso (mohala o pholileng) le ntle le tokiso ea mocheso (mohala o tiileng).(b) Mocheso o mahlonoko oa phetoho ea superconducting e le ts'ebetso ea condensate density bakeng sa litšebelisano tsa boholon-mediated le (mohala o mofubelu o mofubelu) le ntle le (mohala o motšo o tiileng) tokiso ea mocheso.Mohala o nang le matheba a maputsoa o bontša mocheso oa phetoho oa BKT e le ts'ebetso ea condensate density.
Ho phaella ho superconductivity, BEC ke ntho e 'ngoe e etsahalang ka mocheso o tlaase.Ke boemo ba bohlano ba lintho tse boletsoeng esale pele ke Einstein ka 1924. Ho thehoa ha BEC ho etsahala ha liathomo tse nang le matla a tlaase li kopana 'me li kena sebakeng se le seng sa matla, e leng sebaka sa lipatlisiso tse pharaletseng tsa physics ea taba e khutsufalitsoeng.Sistimi e nyalisitsoeng ea Bose-Fermi ha e le hantle e emela ho sebelisana ha lera la lielektrone tse nang le lera la li-bosons, joalo ka li-exciton tse sa tobang, li-exciton-polaron, joalo-joalo.Tšebelisano pakeng tsa likaroloana tsa Bose le Fermi e lebisitse ho mefuta e fapaneng ea lipale le liketsahalo tse tsotehang, tse ileng tsa tsosa thahasello ea mahlakore ka bobeli.Pono ea mantlha le e shebaneng le ts'ebeliso.
Mosebetsing ona, bafuputsi ba tlalehile mochine o mocha oa superconducting ka graphene, e leng ka lebaka la ho sebelisana pakeng tsa li-electrone le "bogolons" ho e-na le li-phonon ka mokhoa o tloaelehileng oa BCS.Bogolons kapa Bogoliubov quasiparticles ke excitations ka BEC, tse nang le litšobotsi tse itseng tsa likaroloana.Ka har'a mekhahlelo e itseng ea paramethara, mochine ona o lumella mocheso o matla oa superconducting ho graphene ho fihla holimo ho 70 Kelvin.Bafuputsi ba boetse ba thehile khopolo e ncha ea microscopic BCS e shebaneng haholo le litsamaiso tse thehiloeng ho graphene e nyalisitsoeng.Mohlala oo ba o hlahisitseng o boetse o bolela esale pele hore thepa ea superconducting e ka eketseha ka mocheso, e leng se fellang ka ho itšetleha ha mocheso o se nang monotonic oa lekhalo la superconducting.
Ho phaella moo, liphuputso li bontšitse hore ho hasana ha Dirac tsa graphene ho bolokiloe morerong ona oa boholon-mediated.Sena se bontša hore mochine ona oa superconducting o kenyelletsa lielektrone tse nang le ho hasana ha relativistic, 'me ketsahalo ena ha e e-s'o hlahlojoe hantle ho fisiks ea lintho tse khutsufalitsoeng.
Mosebetsi ona o senola tsela e 'ngoe ea ho finyella superconductivity e phahameng ea mocheso.Ka nako e ts'oanang, ka ho laola thepa ea condensate, re ka fetola superconductivity ea graphene.Sena se bontša mokhoa o mong oa ho laola lisebelisoa tsa superconducting nakong e tlang.
Nako ea poso: Jul-16-2021 
