Anisotropic nonlinear optical response of nodal-loop materials Article Swipe
YOU?
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· 2021
· Open Access
·
· DOI: https://doi.org/10.1103/physrevb.103.195125
· OA: W3040367163
Nodal line semimetals have lately aroused much experimental and theoretical\ninterest, with their gap closing along unconventional trajectories in the 3D\nBrillouin zone. These trajectories or nodal lines can close into loops and\ntrace out intricate knotted or linked configurations with complicated\ntopologies. In this work, we investigate the semi-classical optical response of\ntwo nodal loops in linked, unlinked and touching configurations, focusing\nparticularly on the interplay of response anisotropy and non-linearity. We\nprovide a geometric picture that unifies these aspects and sheds light on the\neffects of nodal topology and geometry. Based on a model abstracted from\ngeneric multi nodal loop scenarios, both with or without linkages, our findings\nwill be applicable for a large class of nodal semimetal materials with multiple\nnodal lines or loops.\n
