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Andrey Rakhubovsky: Quantum Information Processing with Pulsed Cavity Optomechanics
Begin: 26.04.2018, 13:00
Location: Thursday 26.4.2018 at 13:00, Ke Karlovu 5, Praha 2 in Seminar room F052

Ondřej Kylián: Plasma - from thin films to nanoparticles
Begin: 26.04.2018, 14:00
Location: Lecture room F2, Facutly of Mathematics and Physics, First floor Ke Karlovu 5, Prague 2

 
Title: Jakub Šebesta: Ab initio study of chemical and structural disorder in topological insulator Bi2Se3
Number: 11/18
Status: Closing date exceeded
Begin: Čtvrtek, Březen 22, 2018 at 01:00
Tutor: Tomáš Novotný
Location: Thursday 22.3.2018 at 13:00, Ke Karlovu 5, Praha 2 in Seminar room F052

Thursday 22.3.2018 at 13:00,
Ke Karlovu 5, Praha 2 in Seminar room F052

 

Mgr. Jakub Šebesta

Charles University in Prague, Department of Condensed Matter Physics

Ab initio study of chemical and structural disorder in topological insulator Bi2Se3

The basic way to change physical properties of TI consists in doping the compound by magnetic atoms, which disturbs by magnetic field the time-reversal symmetry guaranteed uncommon surface properties. Besides, the non negligible influence on conductive surface states rests in the presence of defects of crystal structure, e.g. point defects, stacking faults, twinning planes which appear in real conditions. It will be discussed studying physical properties of TI under the influence of the above mentioned structural defects and magnetic atoms in well known bismuth chalcogenides as Bi2Se3, using electronic structure calculation. Ab-initio calculations based on layered TB-LMTO+CPA method have been employed to obtain the dependence of surface states, energetic gap or magnitudes magnetic moments on presented defects. The obtained results will be compared with experiments.


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