Magnon sidebands and spin-charge coupling in bismuth ferrite probed by nonlinear optical spectroscopy

M. O. Ramirez,1 A. Kumar,1 S. A. Denev,1 N. J. Podraza,1,2 X. S. Xu,3 R. C. Rai,3 Y. H. Chu,4,5 J. Seidel,4,5 L. W. Martin,4 S.-Y. Yang,4 E. Saiz,4 J. F. Ihlefeld,2,4 S. Lee,6 J. Klug,7,8 S. W. Cheong,6 M. J. Bedzyk,7,8 O. Auciello,8 D. G. Schlom,1 R. Ramesh,4,5 J. Orenstein,5 J. L. Musfeldt,3 and V. Gopalan1 1Department of Materials Science and Engineering and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA 2Department of Electrical Engineering and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA 3Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA 4Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA 5Department of Physics, University of California, Berkeley, California 94720-1760, USA 6Department of Physics and Astronomy Rutgers and Rutgers Center of Emergent Materials, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, New Jersey 08854-8019, USA 7Materials Research Center, Northwestern University, Evanston, Illinois 60208, USA 8Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA Received 22 January 2009; revised manuscript received 27 March 2009; published 5 June 2009