77 citations · 121 across the 3 of their papers we have counts for
5 papers
Ultrafast Probes of Nonequilibrium Hole Spin Relaxation in Ferromagnetic Semiconductor GaMnAs
Aaron Patz, Tianqi Li, Xinyu Liu +3
We directly measure the hole spin lifetime in ferromagnetic GaMnAs via time- and polarization-resolved spectroscopy. Below the Curie temperature Tc, an ultrafast photoexcitation wi…
Correlating Quasi-Electron Relaxation with Quantum Femtosecond Magnetism in the Order Parameter Dynamics of Insulating Manganites
T. Li, A. Patz, P. Lingos +5
Femtosecond (fs)-resolved simultaneous measurements of charge and spin dynamics reveal the coexistence of two different quasi-particle excitations in colossal magneto-resistive (CM…
Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides
Aaron Patz, Tianqi Li, Sheng Ran +6
Many of the iron pnictides have strongly anisotropic normal-state characteristics, important for the exotic magnetic and superconducting behavior these materials exhibit. Yet, the…
Post-transient relaxation in graphene after an intense laser pulse
Junhua Zhang, Tianqi Li, Jigang Wang +1
High intensity laser pulses were recently shown to induce a population inverted transient state in graphene [T. Li et al. Phys. Rev. Lett. 108, 167401 (2012)]. Using a combination…
Transient Charge and Energy Balance in Graphene Induced by Ultrafast Photoexcitation
Junhua Zhang, Joerg Schmalian, Tianqi Li +1
Ultrafast optical pump-probe spectroscopy measurement on monolayer graphene observes significant optical nonlinearities. We show that strongly photoexcited graphene monolayers with…