Spin Spirals and Charge Textures in Transition-Metal-Oxide Heterostructures
Spin Spirals and Charge Textures in Transition-Metal-Oxide Heterostructures
复制标题
过渡金属氧化物异质结构中的自旋螺旋和电荷织构
DOI：
10.1007/978-3-319-07070-4
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发表时间：
2014
期刊：
影响因子：
6.1
通讯作者：
A. Frano
中科院分区：
文献类型：
--
作者：
A. Frano
This thesis presents the results of resonant and non-resonant x-ray scattering experiments demonstrating the control of collective ordering phenomena in epitaxial nickel-oxide and copper-oxide based superlattices. Three outstanding results are reported:(1) LaNiO3-LaAlO3 superlattices with fewer than three consecutive NiO2 layers exhibit a novel spiral spin density wave, whereas superlattices with thicker nickel-oxide layer stacks remain paramagnetic. The magnetic transition is thus determined by the dimensionality of the electron system. The polarization plane of the spin density wave can be tuned by epitaxial strain and spatial confinement of the conduction electrons.(2) Further experiments on the same system revealed an unusual structural phase transition controlled by the overall thickness of the superlattices. The transition between uniform and twin-domain states is confined to the nickelate layers and leaves the aluminate layers unaffected.(3) Superlattices based on the high-temperature superconductor YBa2Cu3O7 exhibit an incommensurate charge density wave order that is stabilized by heterointerfaces. These results suggest that interfaces can serve as a powerful tool to manipulate the interplay between spin order, charge order, and superconductivity in cuprates and other transition metal oxides.
