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Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

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Anisotropic exchange interactions of spin-orbit-integrated states in Sr2IrO4

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Title
Anisotropic exchange interactions of spin-orbit-integrated states in Sr2IrO4
Author
Jin, HosubJeong, HogyunOzaki, TaisukeYu, Jaejun
Issue Date
2009-08
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.80, no., pp.075112 -
Abstract
We present a microscopic model for the anisotropic exchange interactions in Sr2IrO4. 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 IrO6 octahedra. It is suggested that Sr2IrO4 is a unique class of materials with effective exchange interactions in the spin-orbital Hilbert space.
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DOI
10.1103/PhysRevB.80.075112
ISSN
2469-9950
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PHY_Journal Papers
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