"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 [1] 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 [2]. 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 [3].
[1] A. Ferreira, T. G. Rappoport, M. A. Cazalilla, A. H. Castro Neto,  Phys. Rev. Lett. 112, 066601 (2014).
[2]  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). 
[3] M. A. Cazalilla, H. Ochoa, and F. Guinea, arxiv:1311.6650, to appear in Phys. Rev. Lett. (2014). 

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