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

The Role of Core Hole Effects on Calculated Resonant Inelastic X-Ray Scattering Spectra of Graphene

21 May 2015, 08:00
3h
Board: CON-09
Poster presentation Condensed Matter Physics Poster-2

Speaker

Nuchalee Schwertfager (School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; Thailand Center of Excellence in Physics (ThEP Center), Commission on Higher Education, Bangkok 10400, Thailand)

Description

The electronic band structure of graphene was calculated using the full-potential linearized muffin-tin orbital (FP-LMTO) method. Its resonant inelastic x-ray scattering (RIXS) spectra at various x-ray excitation energies were calculated based on Kramers-Heisenberg equation. It is found that the RIXS spectra show distinct dispersive features and are interpreted as being due to the conservation of crystal momentum during the RIXS process. However, the shift between XAS and XES energy scales due to the presence or absence of the core hole in the final state of these two processes, respectively, has to be taken into account, in order to obtain an optimal agreement between the simulated and experimental RIXS spectral. This shift is consistent with the observed changes in calculated PDOS induced by the presence of the core hole.

Primary author

Nuchalee Schwertfager (School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; Thailand Center of Excellence in Physics (ThEP Center), Commission on Higher Education, Bangkok 10400, Thailand)

Co-authors

Prof. Liang Zhang (National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA) Prof. Sukit Limpijumnong (School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; Thailand Center of Excellence in Physics (ThEP Center), Commission on Higher Education, Bangkok 10400, Thailand) Prof. Walter Lambrecht (Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA)

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