IISER MOHALI

Abstract: Since the isolation of graphene, the first two-dimensional material, it has garneredsignificant research attention owing to its extraordinary properties, such as an extremely highcarrier mobility. High carrier mobility is crucial for devices requiring high switching speeds andlow power dissipation, and this is made possible by graphene's massless dispersion spectrumaround the Fermi energy. Around graphene's Dirac point, magnetoresistance is closely linked toits mobility and shows promise for significant intrinsic magnetoresistance (MR). In thispresentation, Dr. Lourembam will discuss their latest research on giant MR around graphene'sDirac point. The findings reveal a substantial quadratic MR, exceeding 100% at roomtemperature (RT) in magnetic fields as low as 0.1T. This value is orders of magnitude largerthan any other known system at RT. As Landau quantization comes into play with increasingmagnetic field strength, a giant linear MR emerges, reaching approximately 13,000% at RT in a12T magnetic field.\n\nReferences:1N. Xin†, J. Lourembam†, P. Kumaravadivel† et al., (2023) " Strange magnetoresistance of high-mobility Dirac plasma" (Nature, 616,270-274 https://doi.org/10.1038/s41586-023-05807-0)†equal contribution\n\nMeeting ID: 969 5760 7087\nPasscode: 590948\n