Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

Nature Materials Springer Nature 14:9 (2015) 883-888

Authors:

M Först, AD Caviglia, R Scherwitzl, R Mankowsky, P Zubko, V Khanna, H Bromberger, SB Wilkins, Y-D Chuang, WS Lee, WF Schlotter, JJ Turner, GL Dakovski, MP Minitti, J Robinson, SR Clark, D Jaksch, J-M Triscone, JP Hill, SS Dhesi, A Cavalleri

Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

Nature Materials (2015)

Authors:

M Först, AD Caviglia, R Scherwitzl, R Mankowsky, P Zubko, V Khanna, H Bromberger, SB Wilkins, YD Chuang, WS Lee, WF Schlotter, JJ Turner, GL Dakovski, MP Minitti, J Robinson, SR Clark, D Jaksch, JM Triscone, JP Hill, SS Dhesi, A Cavalleri

Abstract:

© 2015 Nature Publishing Group Static strain in complex oxide heterostructures has been extensively used to engineer electronic and magnetic properties at equilibrium. In the same spirit, deformations of the crystal lattice with light may be used to achieve functional control across heterointerfaces dynamically. Here, by exciting large-amplitude infrared-active vibrations in a LaAlO3 substrate we induce magnetic order melting in a NdNiO3 film across a heterointerface. Femtosecond resonant soft X-ray diffraction is used to determine the spatiotemporal evolution of the magnetic disordering. We observe a magnetic melt front that propagates from the substrate interface into the film, at a speed that suggests electronically driven motion. Light control and ultrafast phase front propagation at heterointerfaces may lead to new opportunities in optomagnetism, for example by driving domain wall motion to transport information across suitably designed devices.

An exact formulation of the time-ordered exponential using path-sums

Journal of Mathematical Physics AIP Publishing 56:5 (2015) 053503

Authors:

P-L Giscard, K Lui, SJ Thwaite, D Jaksch

Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Excitation

Physical Review Letters American Physical Society (APS) 114:13 (2015) 137001

Authors:

SJ Denny, SR Clark, Y Laplace, A Cavalleri, D Jaksch

Coexistence of energy diffusion and local thermalization in nonequilibrium XXZ spin chains with integrability breaking

Physical Review E American Physical Society (APS) 91:4 (2015) 042129

Authors:

JJ Mendoza-Arenas, SR Clark, D Jaksch