Title :
Relaxation of Photoinduced Quasi-Particles in Correlated Electron Metals
Author :
Talbayev, Diyar ; Chia, Elbert E M ; Trugman, Stuart A. ; Zhu, Jian-Xin ; Taylor, Antoinette J.
Author_Institution :
Dept. of Chem., Yale Univ., New Haven, CT, USA
Abstract :
We present our studies of photoinduced quasi-particle dynamics in correlated electron metals. At room temperature, these materials exhibit metallic behavior characterized by the presence of a Fermi surface. Electronic correlations lead to a modification of the low-energy electronic structure near the Fermi level resulting in the opening of gaps or partial gaps due to such phenomena as density waves or superconductivity. We describe the results of optical pump-probe studies of quasi-particle dynamics in the spin density wave metal UNiGa5, the heavy-fermion superconductor PuCoGa5, and the pnictide high-temperature superconductor (Ba,K)Fe2As2.
Keywords :
Fermi level; barium compounds; carrier relaxation time; electrical conductivity; electron correlations; electronic structure; fermions; high-temperature superconductors; plutonium compounds; potassium compounds; spin density waves; uranium compounds; (BaK)Fe2As2; Fermi level; Fermi surface; PuCoGa5; UNiGa5; correlated electron metals; density waves; electronic correlations; heavy-fermion superconductor; low-energy electronic structure; optical pump-probe studies; photoinduced quasi-particles; relaxation dynamics; spin density wave metal; temperature 293 K to 298 K; High temperature superconductors; Metals; Phonons; Superconducting transition temperature; Temperature measurement; Correlated electrons; heavy fermions; high-temperature superconductors; spin density wave (SDW); ultrafast optics;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2011.2136373
