Suppression of transport anisotropy at the Anderson localization transition in three-dimensional anisotropic media

Antton Goïcoechea, S. Skipetrov, J. Page
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引用次数: 4

Abstract

We study the transport of classical waves through three-dimensional (3D) anisotropic media close to the Anderson localization transition. Time-, frequency-, and position-resolved ultrasonic measurements are performed on anisotropic slab-shaped mesoglass samples to probe the dynamics and the anisotropy of the multiple scattering halo, and hence to investigate the influence of disorder on the nature of wave transport and its anisotropy. These experiments allow us to address conflicting theoretical predictions that have been made about whether or not the transport anisotropy is affected by the interference effects that lead to Anderson localization. We find that the transport anisotropy is significantly reduced as the mobility edge is approached---a behavior similar to the one predicted recently for matter waves in infinite anisotropic 3D media.
三维各向异性介质中安德森局域化转变中输运各向异性的抑制
我们研究了经典波在接近安德森局域化跃迁的三维各向异性介质中的输运。对各向异性板状介玻璃样品进行了时间、频率和位置分辨超声测量,以探测多重散射晕的动力学和各向异性,从而研究无序对波输运性质及其各向异性的影响。这些实验使我们能够解决关于输运各向异性是否受到导致安德森局域化的干扰效应影响的相互矛盾的理论预测。我们发现,随着迁移率边缘的接近,输运各向异性显著降低——这种行为类似于最近对无限各向异性三维介质中物质波的预测。
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