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Updated: Jan 22, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Published on: March 24, 2019

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在电线反铁磁铁中具有电可切换的非相对论西曼旋转分割

Longju Yu1, Hong Jian Zhao1,2,3,4, Laurent Bellaiche5,6

  • 1Jilin University, Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Changchun 130012, China.

Physical review letters
|January 20, 2026
PubMed
概括

研究人员开发了一种关于反铁磁铁中非相对论西曼旋转分裂 (NRZSS) 的理论. 这使得低功率的旋转器件可以通过电气控制旋转,克服了相对论旋转轨道相互作用的局限性.

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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
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The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
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Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
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