Interference of second harmonics due to electric and magnetic dipoles in antiferromagnetic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Tanabe, Yukito; Muto, Makiko; Fiebig, Manfred; Hanamura, Eiichi

doi:10.1103/physrevb.58.8654

Cited by 26 publications

(23 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In subsection A, we discuss the two susceptibility tensors, χ (e) and χ (m) (defined in Appendix A.1), possibly involved in the interference pattern with the high-temperature signal, determined by χ (q) [18]. Both tensors should be investigated on the same footing because it is known, e.g., for Cr 2 O 3 , that the magnetic part [24] of χ (e) and χ (m) are of the same order of magnitude [25]. We also identify the symmetry of the order parameters associated with χ (e) and χ (m) for linear polarizations and their multipolar ranks.…”

Section: A Reanalysis Of the Symmetries Of The Shg Experimentsmentioning

confidence: 99%

“…To follow the conclusions of Section III.B in more detail, we make use of the following table for the symmetry behavior of the P and M components under the 2/m1 magnetic group (in this subsection, we use the notation P α = er α and M α = µ B (L α + 2S α ), which is more often employed in the SHG community [25,26]): • 21 : The sum over the symmetry elements gives 4 P z , 0, 0, 4i M z , 0, 0. As for the 2/m group, both χ (e) (real part, time-reversal even) and χ (m) can contribute, but none have the correct odd-ψ dependence.…”

Section: Magnetic Subgroups Of Sr2iro4mentioning

confidence: 99%

See 1 more Smart Citation

Magnetic ground state ofSr2IrO4and implications for second-harmonic generation

Matteo¹,

Norman²

2016

Phys. Rev. B

View full text Add to dashboard Cite

The currently accepted magnetic ground state of Sr2IrO4 (the − + +− state) preserves inversion symmetry. This is at odds, though, with recent experiments that indicate a magnetoelectric ground state, leading to the speculation that orbital currents or more exotic magnetic multipoles might exist in this material. Here, we analyze various magnetic configurations and demonstrate that two of them, the magnetoelectric − + −+ state and the non-magnetoelectric + + ++ state, can explain these recent second-harmonic generation (SHG) experiments, obviating the need to invoke orbital currents. The SHG-probed magnetic order parameter has the symmetry of a parity-breaking multipole in the −+−+ state and of a parity-preserving multipole in the ++++ state. We speculate that either might have been created by the laser pump used in the experiments. An alternative is that the observed magnetic SHG signal is a surface effect. We suggest experiments that could be performed to test these various possibilities, and also address the important issue of the suppression of the RXS intensity at the L2 edge.

show abstract

Section: A Reanalysis Of the Symmetries Of The Shg Experimentsmentioning

confidence: 99%

Section: Magnetic Subgroups Of Sr2iro4mentioning

confidence: 99%

Magnetic ground state ofSr2IrO4and implications for second-harmonic generation

Matteo¹,

Norman²

2016

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…However, the phase can carry important information about the magnetic state which is absent in the amplitude. The mutual phase between the magnetic and crystallographic second order susceptibility in AFM Cr 2 O 3 was investigated in order to derive information on the local-field correction [8]. Using interference of magnetic and crystallographic SHG, AFM 180 domains were clearly distinguished [9].…”

mentioning

confidence: 99%

“…where j ¼ y mag À y cryst [8]. To avoid temporal drift in the pump-probe experiments, the four signals are measured consecutively at each delay time.…”

mentioning

confidence: 99%

Time-resolved demagnetization in by phase-sensitive second harmonic generation

Satoh

Aken

Duong

et al. 2007

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…14 AFM insulator Chromium oxide (Cr 2 O 3 ) has been the subject of study since the 1960s and its electronic and static optical properties are now well understood. [15][16][17][18][19][20][21][22][23] However, the ultrafast dynamic demagnetization processes were not probed until recently. 13,[24][25][26] The timeresolved second harmonic generation is applied to probe the time evolution of the magnetic and structural state following laser illuminations in the AFM insulator.…”

Section: Introductionmentioning

confidence: 99%

Model of ultrafast demagnetization driven by spin-orbit coupling in a photoexcited antiferromagnetic insulator Cr2O3

Guo

Zhang

Jin

et al. 2017

The Journal of Chemical Physics

View full text Add to dashboard Cite

We theoretically study the dynamic time evolution following laser pulse pumping in an antiferromagnetic insulator Cr2O3. From the photoexcited high-spin quartet states to the long-lived low-spin doublet states, the ultrafast demagnetization processes are investigated by solving the dissipative Schrödinger equation. We find that the demagnetization times are of the order of hundreds of femtosecond, in good agreement with recent experiments. The switching times could be strongly reduced by properly tuning the energy gaps between the multiplet energy levels of Cr 3+ . Furthermore, the relaxation times also depend on the hybridization of atomic orbitals in the first photoexcited state. Our results suggest that the selective manipulation of electronic structure by engineering stress-strain or chemical substitution allows effective control of the magnetic state switching in photoexcited insulating transition-metal oxides.

show abstract

Interference of second harmonics due to electric and magnetic dipoles in antiferromagneticCr2O3

Cited by 26 publications

References 14 publications

Magnetic ground state ofSr2IrO4and implications for second-harmonic generation

Magnetic ground state ofSr2IrO4and implications for second-harmonic generation

Time-resolved demagnetization in by phase-sensitive second harmonic generation

Model of ultrafast demagnetization driven by spin-orbit coupling in a photoexcited antiferromagnetic insulator Cr2O3

Contact Info

Product

Resources

About