Effect of Pnictogen Height on Spin Waves in Iron Pnictides

Chenglin Zhang, Leland W. Harriger, Zhiping Yin, Weicheng Lv, Miaoyin Wang, Guotai Tan, Yu Song, D. L. Abernathy, Wei Tian, Takeshi Egami, Kristjan Haule, Gabriel Kotliar, and Pengcheng Dai Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA (Received 2 April 2014; published 28 May 2014)