[seminar] 28.10.2016. 11h Gaku Eguchi: Exact analysis of electric transport in Dirac fermion systems

[Damir Pajic]

Drage kolegice i kolege / Dear colleagues,

Drago mi je da mogu najaviti sljedeć‡i seminar / I would like to invite 
you to the following seminar :

petak/Friday 28. 10. 2016., 11:15 h predavaonica/room F201, II.kat

Exact analysis of electric transport in Dirac fermion systems

Dr. Gaku Eguchi

Institute of Solid State Physics, Vienna University of Technology

Charge and spin transport in topologically protected electronic bands 
are one of the main interests of modern condensed matter physics. In 
electric transport, the protected bands result in an conduction 
involving extremely highmobility carriers [1]. Its transport properties 
have been discussed based on the two-carrier Drude model, because of an 
inevitable involvement of additional trivial conduction. The two-carrier 
model is also known to exhibit huge errors originating from multiple 
open parameters, which occasionally lead us to arbitrary 
interpretations. Those fundamental issues confuse the essence of
protected bands.

Recently, a new scheme of magnetotransport analysis is proposed, which
overcomes existing difficulties and determines the two-carrier transport 
properties explicitly [2,3]. Here we present the full scheme of analysis 
that allows to draw robust conclusions. This reproduces transport 
behavior observed in three-dimensional topological insulators, and in 
addition, reveals the Fermi level and the behavior expected for 
realistic conditions [4].

[1] T. Liand et al., Nature Mat. 14, 280 (2015), etc.
[2] G. Eguchi et al., Phys. Rev. B 91, 235117 (2015).
[3] H. Emoto, G. Eguchi et al., Phys. Rev. B 93, 174428 (2016).
[4] G. Eguchi and S. Paschen, arXiv:1609.04134v1 (2016).


Cjeloviti oglas je u prilogu./Formatted announcement is attached.

Lijep pozdrav / Best regards
Damir Pajić

-- 
_________________________________________________________
doc.dr.sc. Damir Pajic              Department of Physics
Assistant professor                    Faculty of Science
http://www.phy.pmf.unizg.hr/~dpajic  University of Zagreb

        Bijenička c. 32, HR-10000 Zagreb, Hrvatska(Croatia)

tel +385 1 4605538 mob +385 95 8136706 fax +385 1 4680336
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