ELFT HÍRADÓ

[SIMON Ferenc <f.simon AT eik.bme.hu>]

MEGHÍVÓ

A BME Fizika Tanszék szemináriumára:

Prof. Jaroslav Fabian
University of Regensburg

Spin phenomena in two dimensional materials

Időpont: 2015. június 1 (hétfő) 10.00
Hely: BME, F. epulet, I. lépcsőhaz, 1. emelet, Schay terem
megközelítes: https://www.google.hu/maps/ AT 47.479918,19.0547192,19z

Rövid bemutatás:
Jaroslav Fabian a spintronikai kutatások egyik meghatározó alakja. 
Összefoglaló munkáját a területen (Rev. Mod. Phys. 76, 323) több mint 
4.500-an hivatkozták. Jelenlegi munkái a grafén - mint ígéretes 
spintronikai alapanyag - spin-relaxációs problémáira irányulnak.

Minden érdeklődőt szeretettel várunk!
Üdvözlettel
Simon Ferenc


Abstract:
Two dimensional materials, such as graphene, transition metal 
dichalcogenides, or black phosphorous, offer immense opportunities for 
electronics and spintronics [1]. Being ultimately thin these materials 
could make the thinnest diodes and transistors, or the thinnest magnetic 
sensors and read heads. Being essentially a surface, they are also 
susceptible to adatoms and admolecules which can induce local magnetic 
moments and giant spin-orbit coupling [2]. This is in fact a great 
opportunity, allowing us to decorate (functionalize) graphene and like 
materials with specific defects to make desired properties. I will review 
the essential spin physics of novel two dimensional materials, including 
spin-orbit coupling and magnetic moments, and discuss the ramifications of 
the (intended and non-intended) functionalization for spin transport 
experiments. Most of the results are obtained by performing first 
principles calculations on large atomic supercells, necessary to study the 
physics in the dilute defect limit. These calculations show a nice 
agreement with experiments regarding spin relaxation in single [3] and 
bilayer [4] graphene, but also make authoritative predictions for future 
realistic charge and spin based device---an example is given by 
optospintronics in graphene/TMC structures.
[1] W. Han, R. Kawakami, M. Gmitra, and J. Fabian, Nature Nanotechnology 
9, 794 (2014).
[2] M. Gmitra, D. Kochan, and J. Fabian, Phys. Rev. Lett. 110, 246602 
(2013).
[3] D. Kochan, M. Gmitra, and J. Fabian, Phys. Rev. Lett. 112, 116602 
(2014).
[4] D. Kochan, S. Irmer, M. Gmitra, and J. Fabian, arXiv:1504.03898






----------------------------
Prof. Ferenc SIMON (PhD, DSc)
professor @ TU-Budapest
privatdozent @ Uni Wien
http://dept.phy.bme.hu/staff/simon/simon.html
http://homepage.univie.ac.at/Ferenc.Simon/
skype: ferisimon
Dept. of Physics Budapest Univ. of Techn. and Econ.
H 1521 Budapest POBox 91 HUNGARY
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