title: Tuning the magnetic phase of a graphene nanodot using its dielectric environment.
abstract: The magnetic properties of a hexagonal graphene nanodot are investigated using a configuration-interaction approach. The phase diagram of the nanodot system is obtained for a wide range of Coulomb interaction strengths and dielectric environments, and shows that the magnetic phase transition can be effectively tailored by changing the dielectric environment. Selective magnetic phase between non-magnetic and ferromagnetic could therefore be achieved simply by changing to an appropriate substrate for the graphene nanodot.
authors.affiliation: State Key Laboratory of Surface Physics, Collaborative Innovation Center of Advanced Microstructures, and Department of Physics, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Sheng
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Zhang
authors.forename: Aiping
authors.initials: A
authors.lastname: Zhou