Kyungwha Park: Difference between revisions
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For device applications, heterostructures have been built and it is critical to understand how the topological surface states | For device applications, heterostructures have been built and it is critical to understand how the topological surface states | ||
are influenced by various interfaces. In this talk, I will present effects of non-magnetic and magnetic interfaces on | are influenced by various interfaces. In this talk, I will present effects of non-magnetic and magnetic interfaces on | ||
the characteristics of the surface-state Dirac cones in three-dimensional topological insulator Bi<sub>2</sub>Se<sub>3</sub>, by using first-principles calculations. In particular, cases of K adsorption, Bi bilayers, II-VI semiconductors, and a ferromagnetic insulator on | the characteristics of the surface-state Dirac cones in three-dimensional topological insulator Bi<sub>2</sub>Se<sub>3</sub>, by using first-principles calculations. In particular, cases of K adsorption, Bi bilayers, II-VI semiconductors, and a ferromagnetic insulator on Bi<sub>2</sub>Se<sub>3</sub>, will be discussed. | ||
==References== | ==References== | ||
*[1] A. T. Lee, M. J. Han, and K. Park, ''Magnetic proximity effect at Bi2Se3/EuS interface: electronic structure and spin-orbital texture,'' Phys. Rev. B '''90''', 155103 (2014). | *[1] A. T. Lee, M. J. Han, and K. Park, ''Magnetic proximity effect at Bi2Se3/EuS interface: electronic structure and spin-orbital texture,'' [http://dx.doi.org/10.1103/PhysRevB.90.155103 Phys. Rev. B '''90''', 155103 (2014)]. | ||
*[2] K. Govaerts, K. Park, C. De Beule, B. Partoens, and D. Lamoen, ''The effect of Bi bilayers on the topological states of | *[2] K. Govaerts, K. Park, C. De Beule, B. Partoens, and D. Lamoen, ''The effect of Bi bilayers on the topological states of Bi<sub>2</sub>Se<sub>3</sub>: A first-principles study,'' [http://dx.doi.org/10.1103/PhysRevB.90.155124 Phys. Rev. B '''90''', 155124 (2014)]. | ||
*[3] K. Park, C. De Beule, and B. Partoens, ''The | *[3] K. Park, C. De Beule, and B. Partoens, ''The ageing effect in topological insulators: evolution of the surface electronic structure of Bi2Se3 upon K adsorption,'' [http://iopscience.iop.org/1367-2630/15/11/113031 New J. Phys. '''15''', 113031 (2013)]. | ||
*[4] K. Park, J. J. Heremans, V. W. Scarola, and D. Minic, ''Robustness of topologically protected surface states in layering of | *[4] K. Park, J. J. Heremans, V. W. Scarola, and D. Minic, ''Robustness of topologically protected surface states in layering of Bi<sub>2</sub>Te<sub>3</sub> thin films,'' [http://dx.doi.org/10.1103/PhysRevLett.105.186801 Phys. Rev. Lett. '''105''', 186801 (2010)]. | ||
Latest revision as of 07:08, 26 August 2015
Affiliation
- Department of Physics, Virginia Tech, Blacksburg, VA 24060, USA
Title
Proximity effects on topological surface states of Bi2Se3 at non-magnetic and magnetic interfaces from first principles
Abstract
Topological insulators have drawn a lot of attention due to topologically protected surface states which are robust with weak disorder in the presence of time-reversal symmetry, as well as applications to spintronics and thermoelectrics. For device applications, heterostructures have been built and it is critical to understand how the topological surface states are influenced by various interfaces. In this talk, I will present effects of non-magnetic and magnetic interfaces on the characteristics of the surface-state Dirac cones in three-dimensional topological insulator Bi2Se3, by using first-principles calculations. In particular, cases of K adsorption, Bi bilayers, II-VI semiconductors, and a ferromagnetic insulator on Bi2Se3, will be discussed.
References
- [1] A. T. Lee, M. J. Han, and K. Park, Magnetic proximity effect at Bi2Se3/EuS interface: electronic structure and spin-orbital texture, Phys. Rev. B 90, 155103 (2014).
- [2] K. Govaerts, K. Park, C. De Beule, B. Partoens, and D. Lamoen, The effect of Bi bilayers on the topological states of Bi2Se3: A first-principles study, Phys. Rev. B 90, 155124 (2014).
- [3] K. Park, C. De Beule, and B. Partoens, The ageing effect in topological insulators: evolution of the surface electronic structure of Bi2Se3 upon K adsorption, New J. Phys. 15, 113031 (2013).
- [4] K. Park, J. J. Heremans, V. W. Scarola, and D. Minic, Robustness of topologically protected surface states in layering of Bi2Te3 thin films, Phys. Rev. Lett. 105, 186801 (2010).
