A sensitive detection method for magnetization-induced second-harmonic generation under an externally applied field

Venkataramanan, V.; Noguchi, Kazutaka; Aono, Masakazu; Suzuki, Takanori

doi:10.1007/s003400200848

Cited by 10 publications

(6 citation statements)

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“…The exchange integral J value for the surface turns out to be small and constitutes −0.44 kcal/mol. The smallness of the integral strengthens motives for the surface magnetic behavior predicted before 55 and provides additional proof toward the reality of the experimental observations of the surface magnetism 56, 57. The latter is of a multimode appearance due to peculiar distribution of the surface spin density.…”

Section: Odd Electrons In the Surface Studysupporting

confidence: 71%

Odd electrons in molecular chemistry, surface science, and solid state magnetism

Sheka

2007

Int J of Quantum Chemistry

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ABSTRACT:A unified theoretical or computational odd-electrons approach is suggested to nanomaterials, making possible their consideration on the same conceptual basis as well as on the same computational footing. The current paper presents the approach application to the chemistry of fullerenes, carbon single-walled nanotubes, surface science of silicon crystal, as well as to the molecular magnetism of both molecular crystals composed of transitional metal complexes and solid polymerized fullerenes.

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Section: Odd Electrons In the Surface Studysupporting

confidence: 71%

Odd electrons in molecular chemistry, surface science, and solid state magnetism

Sheka

2007

Int J of Quantum Chemistry

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“…High spectral resolution, external magnetic fields, or low temperatures have not yet been exploited for SHG studies of semiconductors. As for applying the magnetic field, only one example is available for the rather weak SHG response of a silicon surface at a fixed frequency [8]. Theoretical calculations of crystallographic SHG susceptibilities can be found in literature [9][10][11], but for SHG in semiconductors subject to magnetic fields they are still missing.…”

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confidence: 99%

Magnetic-Field-Induced Second-Harmonic Generation in Semiconductor GaAs

et al. 2005

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We show that application of a magnetic field induces optical second-harmonic generation (SHG) in GaAs. This phenomenon arises from field-induced symmetry breaking causing new optical nonlinearities. A series of narrow SHG lines is observed in the spectral range from 1.52 to 1.77 eV that we attribute to Landau-level quantization of the band energy spectrum. The rotational anisotropy of the SHG signal distinctly differs from that of the electric-dipole approximation. Model calculations reveal that nonlinear magneto-optical spatial dispersion that comes together with the electric-dipole term is the dominant mechanism for this nonlinearity.

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“…[Here (100) is used as as representative of the three equivalent surfaces in the {100} family.] It has long been known that the electrons of the dangling bond radicals of the bare unreconstructed (111) surface, forming a triangular lattice of spins, suffer from geometric frustration of their antiferromagnetic coupling. , Similarly, the unpaired electrons within dimers on the 2 × 1 reconstructed (100) surface exhibit antiferromagnetic coupling. , There is evidence of magnetic behavior in reconstructed silicon surfaces …”

Section: Introductionmentioning

confidence: 99%

“…4,5 There is evidence of magnetic behavior in reconstructed silicon surfaces. 6 Surface radicals can be "passivated" by attaching appropriate functional groups to satisfy normal chemical bonding rules. Attached groups vary from simple hydrogen atoms through hydrocarbons to functional linkers that lend a diverse range of properties to the decorated surface.…”

Section: ■ Introductionmentioning

confidence: 99%

DFT Study of Spin States on Bare and Partially Hydrogenated Si(111) and Si(100) Surfaces

Frankcombe

2014

J. Phys. Chem. C

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Density functional theory calculations have been performed on slabs of crystalline silicon. The unreconstructed (111) and 2 × 1 reconstructed (100) surfaces have been studied. Starting from surfaces wholly passivated with hydrogen, selected sites were unpassivated to yield small clusters of unpaired spins corresponding to dangling bonds. A range of spin densities were converged for each cluster of dangling bonds to investigate the energetics of different spin patterns in these isolated clusters of dangling bonds. The results were broadly consistent with antiferromagnetic coupling between the spins, only mildly affected by the geometric and electronic effects of the surrounding surface bond passivation.

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A sensitive detection method for magnetization-induced second-harmonic generation under an externally applied field

Cited by 10 publications

References 0 publications

Odd electrons in molecular chemistry, surface science, and solid state magnetism

Odd electrons in molecular chemistry, surface science, and solid state magnetism

Magnetic-Field-Induced Second-Harmonic Generation in Semiconductor GaAs

DFT Study of Spin States on Bare and Partially Hydrogenated Si(111) and Si(100) Surfaces

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