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Photoinduced Femtosecond Relaxation Of Antiferromagnetic Orders In The Iron Pnictides Revealed By Ultrafast Laser Ellipsometry, Aaron E. Patz, Tianqi Li, Sheng Ran, Sergey L. Bud'ko, Paul C. Canfield, Jigang Wang
Photoinduced Femtosecond Relaxation Of Antiferromagnetic Orders In The Iron Pnictides Revealed By Ultrafast Laser Ellipsometry, Aaron E. Patz, Tianqi Li, Sheng Ran, Sergey L. Bud'ko, Paul C. Canfield, Jigang Wang
Jigang Wang
We report ultrafast softening of the antiferromagnetic order, ~150fs after the electron thermalization, which follows a two-step recovery pathway to reveal a distinct interplay of magnetism and the nematic order in iron pnictides.
Reflectance Anisotropy Of Gd5si2ge2 And Tb5si2.2ge1.8, S. J. Lee, Joong Mok Park, J. E. Snyder, David C. Jiles, Deborah L. Schlagel, Thomas A. Lograsso, A. O. Pecharsky, David W. Lynch
Reflectance Anisotropy Of Gd5si2ge2 And Tb5si2.2ge1.8, S. J. Lee, Joong Mok Park, J. E. Snyder, David C. Jiles, Deborah L. Schlagel, Thomas A. Lograsso, A. O. Pecharsky, David W. Lynch
Professor David Lynch
Reflectance difference (RD) spectra for the a–b plane of the single crystals of Gd5Si2Ge2and b–c planes of Gd5Si2Ge2 and Tb5Si2.2Ge1.8 were obtained in the photon energy range of 1.5–5.5 eV. Several peaks were observed for these crystals in the measured spectrum range. Similar features were observed in the RD spectra for the b–c planes ofGd5Si2Ge2 and Tb5Si2.2Ge1.8, while different features were observed for the a–b plane and b–c plane of Gd5Si2Ge2. The RD spectra for the crystals arise not only from the surface anisotropy but also from the bulk anisotropy due to the monoclinic structure of the bulk crystal.