[seminar] Podsjetnik na DANAŠNJI Seminar na IF-u. Petak 22.2.2019. u 15:00h - dr. Igor Žutić, University at Buffalo, USA

[Hrvoje Skenderovic]

Institut za fiziku, Bijenička cesta 46, 

predavaonica u zgradi Mladen Paić petak, 22. veljače 2019., u 15:00 sati 







Magnetic Proximity Effects in Two-Dimensional Materials 


Igor Žutić 



University at Buffalo, USA 



P roximity effects can transform a given material through its adjacent regions to become superconducting, magnetic, or topologically nontrivial [1]. In bulk materials, the sample size often greatly exceeds the characteristic lengths of proximity effects allowing their neglect. However, in 2D materials such as graphene, transition-metal dichalcogenides (TMDs) and 2D electron gas (2DEG), the situation is drastically different. Even short-range magnetic proximity effects exceed their thickness and strongly modify spin transport and optical properties [2-4]. Bias-controlled spin polarization reversal in Co/h-BN/graphene [2] suggests that magnetic proximity effects may overcome the need for an applied magnetic field and a magnetization reversal to implement spin logic [5]. In TMDs, where robust excitons dominate their optical response, magnetic proximity effects cannot be described by the single-particle description. We predict a conversion between optically inactive and active excitons by rotating the magnetization of the substrate [4]. Magnetic proximity-controlled TMD lasers may extend advantages of using spin-polarized carriers we demonstrated in lasers based on conventional semiconductors [6]. Combined magnetic and superconducting proximity effects could produce topological materials and realize elusive Majorana bounds states (MBS) for fault-tolerant quantum computing [7,8]. Exchanging (braiding) MBS yields a noncommutative phase, a sign of non-Abelian statistics and nonlocal degrees of freedom protected from local perturbations . 




1. I. Žutić et al., Materials Today 22 , 85 (2019) , arXiv:1805.07942. 

2. P. Lazi ć , K. Belashchenko, I. Žutić , Phys. Rev. B 93 , 241401(R) (2016). 

3. K. Zollner et al., Phys. Rev. B 94 , 155441 (2016) 

4. B. Scharf et al., Phys. Rev. Lett. 119 , 127403 (2017) 

5. H. Wen et al., Phys. Rev. Appl. 5 , 044003 (2016) 

6. M. Lindemann et al., arXiv:1807.02820, to appear in Nature. 

7. G. Fatin et al., Phys. Rev. Lett. 117 , 077002 (2016). 

8. T. Zhou et al., arXiv:1901.02506. 

Voditelji seminara IF-a: [ mailto:hrvoje at ifs.hr | Hrvoje Skenderović ] i [ mailto:damirs at ifs.hr | Damir Starešinić ] 



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