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Our research unveils a novel coupling mechanism observed at the interface of insulator SrTiO3 (STO) and conductor La0.47Sr0.53MnO3 (LSMO). When these materials are in close contact, atomic vibrations in STO influence LSMO’s magnetic and electrical properties. This interaction demonstrates that oscillations in the octahedral network formed by oxygen atoms can effectively couple two dissimilar materials, revealing significant implications for nanoscale device engineering. Our findings enhance the understanding of material interfaces in functional applications.
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Linked atomic motions across an interface John C. Tully, Yale University, DMR 0520495 We have discovered a new type of coupling mechanism that acts across the interface between two dissimilar materials. When the insulator SrTiO3 (STO) and the conducting and magnetic La0.47Sr0.53MnO3 (LSMO) are in intimate contact at an interface, the jiggling of the atoms in the STO propagates into the LSMO and modulates both its magnetism and electrical conductivity. STO LSMO Oxygen atoms in STO and LSMO form a continuous network of octahedra (red lines and triangular faces). The dashed line is the interface between STO and LSMO. The arrows illustrate the oscillations of the octahedra that couple the two materials across their interface. La or Sr O Sr Y. Segal, K. F. Garrity, C. A. F. Vaz, J. D. Hoffman, F. J. Walker, S. Ismail-Beigi, and C. H. Ahn, Yale Univ.
