"Ultrafast Dynamics of the Mid-infrared Pseudogap in Stripe-phase La1.75SrNiO4"

G. Coslovich: B. Huber, W.-S. Lee, Y.-D. Chuang, Y. Zhu, T. Sasagawa, Z. Hussain, H. A. Bechtel, M. C. Martin, R. W. Schoenlein, Z.-X. Shen, and R. A. Kaindl; OSA , 05/06/12.

Additional Authors: B. Huber, W.-S. Lee, Y.-D. Chuang, Y. Zhu, T. Sasagawa, Z. Hussain, H. A. Bechtel, M. C. Martin, R. W. Schoenlein, Z.-X. Shen, and R. A. Kaindl

Abstract:

We present the first ultrafast mid-infrared study of charge and spin-ordered nickelates. A multi-component dynamics is observed, evidencing the femtosecond decay and formation of the low-energy pseudogap in the optical conductivity.