Nonlinear Optical Response of SrTiO3-LaAlO3 Superlattices - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: The electronic symmetry of the SrTiO3-LaAlO3 interface was investigated byoptical second harmonic generation, using superlattices with varyingperiodicity to study the evolution of the electronic reconstruction whileavoiding substrate contributions. The superlattices show large perpendicularoptical nonlinearity, which abruptly increases when the sublattice thicknessgoes above 3 unit cells, revealing substantial effects of the polar-nonpolarinterface. The nonlinear -active- area is primarily in SrTiO3, develops withincreasing thickness, and extends up to 8 unit cells from the interface.



Author: N. Ogawa, K. Miyano, M. Hosoda, T. Higuchi, C. Bell, Y. Hikita, H. Y. Hwang

Source: https://arxiv.org/



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