{"id":6173,"date":"2023-04-26T22:00:00","date_gmt":"2023-04-26T22:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=6173"},"modified":"2023-04-14T08:13:09","modified_gmt":"2023-04-14T08:13:09","slug":"graphene-defies-expectations-with-record-breaking-magnetoresistance-response","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/graphene-defies-expectations-with-record-breaking-magnetoresistance-response\/","title":{"rendered":"Graphene Defies Expectations With Record-breaking Magnetoresistance Response"},"content":{"rendered":"\n

According to a paper published in Nature<\/em><\/a>, researchers from the University of Manchester<\/a> have discovered record-high magnetoresistance in graphene under ambient conditions. The team used high-quality graphene and tuned it to its intrinsic state, creating a plasma of fast-moving “Dirac fermions” that exhibited surprisingly high mobility despite frequent scattering. Both the high mobility and neutrality of this Dirac plasma are crucial components for the reported giant magnetoresistance.<\/p>\n\n\n

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In its ideal form, graphene is a material formed by carbon atoms attached together like tiled hexagons. (AlexanderAIUS\/Wikimedia Commons<\/a>, 2010)<\/figcaption><\/figure>\n<\/div>\n\n\n

Typically, researchers have to cool materials to liquid-helium temperatures to observe strong magnetoresistance responses. However, the team found that graphene exhibits a powerful response, reaching above 100% in magnetic fields of standard permanent magnets. Graphene exhibits a giant linear magnetoresistance in fields above a few Tesla, which is weakly temperature dependent, and this high-field magnetoresistance is again record-breaking.<\/p>\n\n\n\n

In addition to the record magnetoresistivity, the researchers found that, at elevated temperatures, neutral graphene becomes a so-called “strange metal.” The behavior of strange metals is poorly understood and remains a mystery currently under investigation worldwide. The Manchester work adds more mystery to the field by showing that graphene exhibits a giant linear magnetoresistance in fields above a few Tesla, which is weakly temperature dependent.<\/p>\n\n\n\n

References<\/h1>\n\n\n\n