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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/10844

Title: Anisotropic exchange interactions of spin-orbit-integrated states in Sr_2IrO_4
Authors: Jin, Hosub
Jeong, Hogyun
Ozaki, Taisuke
Yu, Jaejun
Issue Date: 2009-08-13
Publisher: American Physical Society
Magazine name: Physical Review B
Volume: 80
Number: 7
Start page: 075112-1
End page: 075112-5
DOI: 10.1103/PhysRevB.80.075112
Abstract: We present a microscopic model for the anisotropic exchange interactions in Sr_2IrO_4. A direct construction of Wannier functions from first-principles calculations proves the j_<eff>=1/2 character of the spin-orbit integrated states at the Fermi level. An effective j_<eff>-spin Hamiltonian explains the observed weak ferromagnetism and anisotropy of antiferromagnetically ordered magnetic state, which arise naturally from the j_<eff>=1/2 state with a rotation of IrO_6 octahedra. It is suggested that Sr_2IrO_4 is a unique class of materials with effective exchange interactions in the spin-orbital Hilbert space.
Rights: Hosub Jin, Hogyun Jeong, Taisuke Ozaki, and Jaejun Yu, Physical Review B, 80(7), 2009, 075112-1-075112-5. Copyright 2009 by the American Physical Society. http://dx.doi.org/10.1103/PhysRevB.80.075112
URI: http://hdl.handle.net/10119/10844
Material Type: publisher
Appears in Collections:z10-10-1. 雑誌掲載論文 (Journal Articles)

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