When you purchase through links on our web site , we may bring in an affiliate commission . Here ’s how it works .
Graphene , one of the human beings ’s strongest material , is n’t ordinarily magnetic . But when stacked and twisted , graphene develops a rare form ofmagnetism , new enquiry finds .
The magnetic area is n’t created by the usual tailspin of electron within the individual graphene layers , but or else arise from the corporate swirling of negatron in all of the three - layer of the stack graphene structure , investigator reported Oct. 12 in the journalNature Physics .
A stacked and twisted set of graphene sheets leads to a rare form of magnetism, in which electrons across the stacks swirl in unison.
Graphene is a material made of a undivided stratum ( or monolayer ) ofcarbonatomsarranged in a honeycomb pattern . It ’s improbably light and strong ( though it is vulnerable to cracking ) . It also conducts electricity , making it exciting for utilization in electronics and sensors .
Related : Elementary , my beloved : 8 little - make out chemical element
" We wondered what would happen if we combined graphene monolayers and bilayers into a twisted three - layer system , " Cory Dean , a physicist at Columbia University in New York and one of the senior authors on the new composition , enjoin in a argument . " We found that change the number of graphene level endows these composite cloth with some exciting new property that had not been learn before . "
Dean and his colleagues stack two layers of graphene and then added a single bed on top , splay the great deal by 1 degree . They then study this graphene sandwich in a miscellany of circumstances , including temperature just above rank zero ( the detail at which all molecular motion stops ) . At these small temperatures , they launch that the graphene stopped direct electrical energy and became an dielectric instead .
— The mystifying cathartic of 7 casual things
— What ’s that ? Your physics questions answered
— 9 nerveless fact about magnets
They also ascertain that they could control the properties of the twisting stack of graphene by apply anelectric field . When the electric landing field was oriented in one direction , the system acted like a twisted doubled stratum of graphene . When they reversed the field , the mickle took on the properties of a distorted four - bed graphene social system .
Perhaps strange of all was the rarified magnetism that appeared in the three - layer social organisation . A study published by another group in the journalAdvanced Materialsfound that graphene stick withboronnitride can give rise to a strange magnetic playing field ; that landing field arise from the molecular bonds of the carbon copy in graphene and the B in boron nitride . The raw enquiry bring out that this same case of magnetic attraction can come about in pure graphene alone , simply because of interactions between carbon speck .
" virginal carbon paper is not magnetized , " study co - generator Matthew Yankowitz , a physicist at the University of Washington in Seattle , said in the assertion . " Remarkably , we can mastermind this belongings by arranging our three graphene sheets at just the correct twist angles . "
The structure also contains regions where the properties are undisturbed by the straining of the bed . These unique field in the material could be exploited for data storage or quantum computation applications , field of study co - author Xiaodong Xu , also at the University of Washington , said in the statement .
The researchers are now planning to delve deeper into the fundamental properties of the graphene structure . " This is really just the beginning , " Yankowitz say .
Originally published on Live Science .
