Title :
Time-resolved observation of magnon renormalization effects in Cr/sub 2/O/sub 3/
Author :
Dodge, J.S. ; Schumacher, A.B. ; Bigot, J.-Y. ; Chemla ; Ingle, N. ; Beasley, M.R.
Author_Institution :
Div. of Mater. Sci., Lawrence Berkeley Lab., CA, USA
Abstract :
Summary form only given. In the last decade time resolved nonlinear optical spectroscopy (TR-NLOS) has revealed a wealth of information on many body effects in semiconductors and their heterostructures. Surprisingly TR-NLOS techniques have not been thoroughly applied to strongly correlated materials, where Coulomb interaction produces zero-order effects, and therefore play an even more dominant role in many physical properties. In this contribution we present the first TR-NLOS investigation of magnon dynamics in a strongly correlated antiferromagnetic insulator, Cr/sub 2/O/sub 3/. We have observed a novel nonlinear optical effect associated with the occupation dependence of the magnon dispersion relation, which presents the opportunity to optically manipulate and study magnetic excitations in strongly correlated insulators.
Keywords :
antiferromagnetic materials; chromium compounds; magneto-optical effects; magnons; nonlinear optics; renormalisation; spin dynamics; strongly correlated electron systems; time resolved spectra; Cr/sub 2/O/sub 3/; magnon dynamics; magnon renormalization effects; nonlinear optical spectroscopy; occupation dependence; strongly correlated antiferromagnetic insulator; time-resolved observation; Antiferromagnetic materials; Chromium; Laser excitation; Nonlinear optics; Optical pumping; Particle beam optics; Pump lasers; Semiconductor materials; Spectroscopy; Stationary state;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1999. QELS '99. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-576-X
DOI :
10.1109/QELS.1999.807568