Dr. Mukul Kabir

Associate Professor
Department of Physics

Indian Institute of Science Education and Research, Pune
Dr. Homi Bhabha Road, Pashan, Pune 411008

E-mail: mukul.kabir[at]iiserpune.ac.in

Brief Bio-sketch:

Dr Kabir did his PhD at the S. N. Bose National Center for Basic Sciences, Kolkata, and soon after joined the Massachusetts Institute of Technology, Cambridge as a postdoctoral associated, where he worked during 2006-2011. After his long stint at MIT, he joined the Physics department of IISER-Pune in 2012, where his research group is devoted in the areas of two-dimensional materials, strongly correlated systems, magnetism, and predictive catalyst design.

FERROMAGNETISM IN NITROGEN-DOPED GRAPHENE

Inducing a robust long-range magnetic order in diamagnetic graphene remains a challenge. While nitrogen-doped graphene is reported to be a promising candidate, the corresponding exchange mechanism endures unclear and is essential to tune further and manipulate magnetism. In this talk, we will systematically discuss the local moment formation and the concurrent interaction between various defect complexes. The importance of adatom diffusion on the differential defect abundance will be elaborated. The individual nitrogen complexes that contribute toward itinerant and a local magnetic moment are identified. The magnetic interaction between the complexes is found to depend on the concentration, complex type, sublattice, distance, and orientation. We will establish that the direct exchange mechanism between the delocalized magnetic moment originating from the π-electron at the prevalent triazine complex to be responsible for the observed ferromagnetism. Further, we will discuss the effect of boron co-doping.

References :

[1]   Rohit Babar and Mukul Kabir, Ferromagnetism in nitrogen-doped graphene, to be published (2019)