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arXiv · 2209.03296

Ultrahigh breakdown current density of van der Waals One Dimensional $\mathrm{PdBr_2}$

Bikash Das·Kapildeb Dolui·Rahul Paramanik·Tanima Kundu·Sujan Maity·Anudeepa Ghosh·Mainak Palit·Subhadeep Datta
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Abstract

One-dimensional (1D) van der Waals (vdW) materials offer nearly defect-free strands as channel material in the field-effect transistor (FET) devices and probably, a better interconnect than conventional copper with higher current density and resistance to electro-migration with sustainable down-scaling. We report a new halide based "truly" 1D few-chain atomic thread, PdBr$_2$, isolable from its bulk which crystallizes in a monoclinic space group C2/c. Liquid phase exfoliated nanowires with mean length (20$\pm$1)$\mu$m transferred onto SiO$_2$/Si wafer with a maximum aspect ratio of 5000 confirms the lower cleavage energy perpendicular to chain direction. Moreover, an isolated nanowire can also sustain current density of 200 MA/cm$^\mathrm{2}$ which is atleast one-order higher than typical copper interconnects. However, local transport measurement via conducting atomic force microscopy (CAFM) tip along the cross direction of the single chain records a much lower current density due to the anisotropic electronic band structure. While 1D nature of the nanoobject can be linked with non-trivial collective quantum behavior, vdW nature could be beneficial for the new pathways in interconnect fabrication strategy with better control of placement in an integrated circuit (IC).

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Bikash Das, Kapildeb Dolui, Rahul Paramanik, Tanima Kundu, Sujan Maity, Anudeepa Ghosh, Mainak Palit, Subhadeep Datta. 2022-09-07. Ultrahigh breakdown current density of van der Waals One Dimensional $\mathrm{PdBr_2}$. https://doi.org/10.1063/5.0150243

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