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Calendar: ALS Calendar
Title: ALS-CXRO Seminar: Interview Seminar, Mikhail Yablonskikh
When: 02/12/2013 10:00 AM - 11:00 AM
Description: Soft X-ray Absorption, Photoelectron and Photon emission Spectroscopies of magnetic 3d transition metal diselenides of titanium.

Mikhail Yablonskikh
Spectromicroscopy beamline, Elettra

Layered titanium dichalcogenides intercalated with transition metals are low dimensional solids where monoatomic layers of TM atoms (TM=Cr, Mn, Co, Fe, Cu) with a given density are separated by nonmagnetic slabs of TiZ2 matrix (Z=S, Se, Te). Single crystals of TMxTISe2 and TMxTi1-xSe2 (TMDC’s) are of scientific interest because their magnetic and transport properties are drastically changed as a result of TM intercalation or Ti substitution. Discovery of charge-denstity wave (CDW) to superconductive state transition in Cu diselenides of titanium and promise of that for Fe and Cr TMDC’s inspired a number of studies of their electronic structure. Mn and Cr TMDC’s are becoming the subjects of scientific interest in spintronics because of a possibility to form a half-metallic band structure. Electronic band structure and the chemical bonding situation were examined for three cases: TiZ2 (Z=S, Se, Te) , TM (Cr, Mn) intercalates and Cr substitution compounds. Results of Soft X-ray Absorption, Resonant and Non-Resonant Photoelectron and Photon emission spectroscopies (XAS, XPS, XES, ResPES and RXES) of single crystals will be presented. Opportunities for further research of those materials by other Soft X-ray based techniques will be discussed.
Location: 2-400F CXRO/ESG-CR
Author: jetempler@lbl.gov