Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session B13: Materials (General) -- Modeling and Characterization
11:15 AM–2:15 PM,
Monday, March 4, 2019
BCEC
Room: 153B
Sponsoring
Unit:
DMP
Chair: Dmitry Ovchinnikov, University of Washington
Abstract: B13.00012 : Oxidation effect on WTe2 using optical second harmonic generation*
1:51 PM–2:03 PM
Presenter:
Yujin Cho
(University of Texas at Austin)
Authors:
Yujin Cho
(University of Texas at Austin)
Na Hyun Jo
(Iowa State University)
Paul Canfield
(Iowa State University)
Michael C Downer
(University of Texas at Austin)
This material is known to be particularly sensitive to oxidation, which could alter its electronic and mechanical properties. Optical Second Harmonic Generation (SHG) microscopy is a good way to probe the small change at the surface due to its hypersensitivity to the structural changes. We used Ti:Sapphire laser, with 76 MHz repetition rate and 150 fs pulse, to see the oxidation effect on the rotational anisotropic SHG at a discrete oxidation level. We found out that the oxidation greatly affects SHG intensities in s-in/s-out polarization configuration. In this talk, I will be presenting a systematic study of oxidation effect on the bulk WTe2 as well as its spectroscopic response.
1 Y. Wu et al., Phys. Rev. B 94, 121113(R) (2016)
2 Z. Fei et al., Nat. Phys. 13, 677 (2017)
*This work is supported by Robert Welch Foundation, F-1038. N.H.Jo and P.C.Canfield was supported by the U.S. DOE/BES, Division of Materials Sciences and Engineering under Contract No. DE-AC02-07CH11358. Na Hyun Jo is supported by the Gordon and Betty Moore Foundation EPiQS Initiative (Grant No. GBMF4411)
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