Second-harmonic generation with magnetic-field controllability

Ju, Sheng; Cai, Tianyi; Wei, Chi-I; Guo, Guang‐Yu

doi:10.1364/ol.34.003860

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Nevertheless, both probing tools cannot tell the subtle interlayer structural information, which is, however, crucial for studying vdW materials because their magnetic orders are strongly correlated with interlayer configurations. [9][10][11] Second-harmonic generation (SHG) is a powerful tool to discriminate the magnetic point or space groups that are indistinguishable by the above diffraction methods [12][13][14][15] . Particularly, significant nonlinear optical (NLO) responses were reported in bilayer AFM chromium triiodide (CrI 3 ) 16,17 , indicating potentially unique SHG of layered magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal second-harmonic generation in few-layer chromium triiodide

et al. 2020

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It is of fundamental importance but challenging to simultaneously identify atomic and magnetic configurations of two-dimensional van der Waals materials. In this work, we show that the nonreciprocal second-harmonic generation (SHG) can be a powerful tool to answer this challenge. Despite the preserved lattice inversion symmetry, the interlayer antiferromagnetic order and spin-orbit coupling generate enhanced SHG in PT-symmetric bilayer chromium triiodide (CrI3). Importantly, the in-plane polarization-resolved SHG is sensitive to subtly different interlayer structures that cannot be told by linear optical spectra. Beyond bilayer, we further predict that the intensity and angleresolved SHG can be employed to identify both interlayer atomic and magnetic configurations of trilayer CrI3. Our first-principles results agree with available measurements and show the potential of SHG as a non-contacting approach to explore correlations between interlayer structures and magnetic orders of emerging ultra-thin magnetic materials.

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Section: Introductionmentioning

confidence: 99%

Nonreciprocal second-harmonic generation in few-layer chromium triiodide

et al. 2020

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First-principles study of structural, elastic, electronic and vibrational properties of BiCoO3

Koroglu

Çabuk

Deligöz

2014

Solid State Sciences

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Photovoltaic effect in ferroelectrics

Cai¹,

Ju²

2018

Acta Phys. Sin.

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Ferroelectric oxides are attractive materials for constructing efficient solar cells. The mechanism includes the anomalous photovoltaic effect (APE) and the bulk photovoltaic effect (BPE). The BPE refers to the generation of a steady photocurrent and above-bandgap photovoltage in a single-phase homogeneous material lacking inversion symmetry. The mechanism of BPE is different from the typical p-n junction-based photovoltaic mechanism in heterogeneous materials. We survey the history, development and recent progress in understanding the mechanisms of BPE, with a focus on the shift current mechanism, an intrinsic BPE that is universal to all materials lacking inversion symmetry. We also review the important factors to the APE, i.e., the domain boundary, the Schottcky junction, and the depolarization field. The recent successful applications of inorganic and hybrid perovskite structured materials in solar cells emphasize that ferroelectrics can be used in conventional photovoltaic architectures. We review the development in this field, with a particular emphasis on the perovskite materials and the theoretical explanations. In addition to discussing the implication of a ferroelectric absorber layer and the solid state theory of polarization, the design principles and prospect for high-efficiency ferroelectric photovoltaics are also mentioned. Considering the coupling between the degrees of freedom, some special ferroelectrics are expected to have prominent multi-functionality. With the introduction of the additional degree of freedom, some ferroelectrics, i.e., ScFexCr1-xO3 (1/6 x 5/6), can be a promising candidate for highly efficient solar cells and spin photovoltaic devices.

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Second-harmonic generation with magnetic-field controllability

Cited by 3 publications

References 22 publications

Nonreciprocal second-harmonic generation in few-layer chromium triiodide

Nonreciprocal second-harmonic generation in few-layer chromium triiodide

First-principles study of structural, elastic, electronic and vibrational properties of BiCoO3

Photovoltaic effect in ferroelectrics

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