Magnetic 2D materials: recent progress and applications

Seminario

  • Dipartimento di Fisica - Aula 501
  • Seminario

Relatori

Dr. Guido Menichetti
Istituto Italiano di Tecnologia

Dettagli

Atomically-thin magnetic crystals have been recently isolated experimentally [1,2], greatly expanding the family of two-dimensional materials [3,4]. The opportunities opened by 2D magnets are huge, ranging from the possibility of exploring a plethora of different 2D magnetic states to that of controlling the magnetic properties with external magnetic field. Moreover, using such materials as parts of heterostructures may disclose new exciting directions such the realization of quantum and topological phases [5,6,7]. The atomic nature of this materials is obviously rather complex and the microscopic understanding of their ground-state properties requires massive use of ab-initio theories, such as density functional theory (DFT).  After an introduction to the growing research field of magnetic 2D material and their applications, I will presents an overview of the DFT and some fundamental ab-initio methods. Then, I will focus my attention on the case of one of the most studied 2D ferromagnets- semiconducting Cr2Ge2Te6 - discussing its electronic structure and magnetic properties [8].  

[1] C. Gong, et al., Nature 546, 265 (2017). 
[2] B. Huang et al., Nature 546, 270 (2017). 
[3] A.K. Geim and I.V. Grigorieva, Nature 499, 419 (2013). 
[4] N. Mounet et al., Nat. Nanotechnol. 13, 246 (2018). 
[5] K.S. Burch, D. Mandrus, and J.-G. Park, Nature 563, 47 (2018). 
[6] C. Gong and X. Zhang, Science 363, 706 (2019). 
[7] M. Gibertini, M. Koperski, A.F. Morpurgo, and K.S. Novoselov, Nat. Nanotechnol. 14, 408 (2019) 
[8] G. Menichetti, M. Calandra, and M. Polini, 2D Mater. 6, 045042 (2019)