20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Electronic and dynamical properties of YH$_{\textrm{x}}$ (2.83 < x $\leq$ 3.00)

21 May 2015, 08:00
3h
Board: CON-04
Poster presentation Condensed Matter Physics Poster-2

Speaker

Mr Anuphong Thongted (Department of Physics, Faculty of Science, Chulalongkorn University, THAILAND 10330)

Description

According to thin film experiments, the electronic property of yttrium-hydride (YHx) system changes as a function of hydrogen concentration. The transformation of yttrium dihydride (YH${}_2$) into yttrium trihydride (YH${}_3$) structure by hydrogenation causes its resistivity to increase rapidly, and is constant after the YH${}_{2.85}$ is formed. We used *ab-initio* calculations to study the electronic and dynamical properties of YH${}_x$ hcp phase, where 2.83 < $x \leq$ 3.00, by removing hydrogen atoms at different sites. Results show metal-to-semiconductor transition with increasing hydrogen content, consistent to the experiment.

Primary author

Mr Anuphong Thongted (Department of Physics, Faculty of Science, Chulalongkorn University, THAILAND 10330)

Co-authors

Mr Prutthipong Tsuppayakorn-aek (Department of Physics, Faculty of Science, Chulalongkorn University, THAILAND 10330) Mr Teerachote Pakornchote (Department of Physics, Faculty of Science, Chulalongkorn University, THAILAND 10330) Dr Udomsilp Pinsook (Department of Physics, Faculty of Science, Chulalongkorn University, THAILAND 10330)

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