ELFT HÍRADÓ

[tcsaba AT eik.bme.hu]

                               MEGHÍVÓ

         a BME Fizikai Intézete Elméleti Fizika Tanszékének

                           szemináriumára:


                             Sándos Bordács
                         Department of Physics
            Budapest University of Technology and Economics


                 "Landau Level Spectroscopy in BiTeI"


We have studied the bulk electron dispersion in the polar  
semiconductor BiTeI by infrared magneto-optical spectroscopy [1]. A  
series of inter-LL transitions with square root B field dependence,  
characteristic of Dirac electrons, were observed when the Fermi energy  
was close to the intersection of the spin-polarized bands (Dirac  
point). The cyclotron resonance can be detected even at room  
temperature, indicating a large energy gap between the lowest LLs. The  
magnetic field dependence of the LLs are compared with the results of  
first-principles band structure and analytic calculations.

[1] S. Bordács, J. G. Checkelsky, H. Murakawa, H. Y. Hwang, and Y.  
Tokura, Phys. Rev. Lett. 111, 166403 (2013).


Helye: BME Fizikai Intézet, Elméleti Fizika Tanszék
Budafoki út 8. F-épület, III lépcsöház
Szemináriumi szoba

Ideje: 2015. március 27. péntek, 10:15.

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