"Some Aspects of Spintronics in Two-dimensional Materials"
Who: Miguel A. Cazalilla, Department of Physics, National Tsing Hua University, Taiwan & DIPC
Place: Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4, Donostia
Date: Tuesday, 29 July 2014, 12:00
In this seminar, I will discuss two topics related to spin physics and spintronics in two-dimensional materials. The first part of the talk is concerned with spin transport in single-layer Graphene decorated with transition metal clusters. I will present a theory  that predicts a fairly large enhancement of the spin Hall effect (SHE) in such a system due to the effect of resonant skew scattering. I will show that this simple model provides a reasonably accurate account of some recent experiments in which a giant spin Hall effect has been observed in decorated Graphene devices . In the second part of the talk, I will turn my attention to a new family of two-dimensional crystal that are currently attracting much attention: Transition metal dichalcogenides like MoS2. I will argue these materials, when doped, can become spin Hall insulators displaying the quantized SHE, when undergoing shear strain or if they are placed on substrates that produce Moire patterns . References:  A. Ferreira, T. G. Rappoport, M. A. Cazalilla, A. H. Castro Neto, Phys. Rev. Lett. 112, 066601 (2014).  J. Balakrishnan, G. K. W. Koon, A. Avsar, Y. Ho, J. H. Lee, M. Jaiswal, S.-J. Baeck, J.-H. Ahn, A. Ferreira, M. A. Cazalilla, A. H. Castro Neto, and B. ?Ozyilmaz, to appear in Nature Communications (2014).  M. A. Cazalilla, H. Ochoa, and F. Guinea, arxiv:1311.6650, to appear in Phys. Rev. Lett. (2014).