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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/91589
- Title
- Partly non-Kramers freezing of tunneling in a spin molecule
- Author(s)
- Zhu, Jia-Lin; Hu, Hui; Lu, Rong; Xiong, Jia-Jiong
- Abstract
- The ground-state tunnel splitting for a biaxial spin molecule in a magnetic field applied in the YZ plane with the model Hamiltonian H=k1Sz2+k2Sy2−gμBHzSz−gμBHySy has been investigated within a continuous spin approach containing the Wess–Zumino–Berry term. The tunneling without Kramers' degeneracy can be completely frozen out at Hy=0 and a certain Hz while the tunnel splitting increases monotonically with Hy at Hz=0. For Hy≠0 and Hz≠0, the tunneling can be partly frozen out. The degree of the non-Kramers freezing is sensitive to the Hy and anisotropy. The stronger the Hy and anisotropy are, the less the freezing is. The field-direction effect is in agreement with that observed in a recent experiment of Fe8 molecular nanomagnets.
- Publication type
- Journal article
- Source
- Physics Letters A: General, Atomic and Solid State Physics, Vol. 265, no. 3 (Jan 2000), pp. 217-220
- Publication year
- 2000
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences
- Keyword(s)
- Ferromagnetism; Tunnelling
- Publisher
- Elsevier
- ISSN
- 0375-9601
- Publisher URL
- http://dx.doi.org/10.1016/s0375-9601(99)00884-1
- Copyright
- Copyright © 2000 Elsevier Science B.V. All rights reserved.
- Additional information
- Supported by NSF-China (Grant No.19974019).
- Peer reviewed
