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- W3014154743 abstract "We present the theory of out-of-plane electron thermal-field emission from 2D semimetals. We show that the current($mathcal{J}$)-field($F$)-temperature($T$) characteristic is captured by a universal scaling law applicable for broad classes of 2D semimetals, including monolayer and few-layer graphene, nodal point semimetals, nodal line semimetals and Dirac semimetals at the verge of topological phase transition. The low-temperature scaling takes the universal form, $logleft( mathcal{J}/F^gamma right) propto -1/F$ with $gamma = 1$ for 2D semimetals, which is in stark contrast to the classic Fowler-Nordheim scaling of $gamma = 2$ for 3D metals. Importantly, the Fermi level dependence of the tunneling currents depends sensitively on the nodal structure through the electronic density of states, thus serving as a probe for detecting the various possible nodal structures of 2D semimetals. Our findings provide a theoretical basis for the understanding of tunneling charge transport phenomena in solid/vacuum and solid/solid interfaces, critical for the development of 2D-material-based vacuum and solid-state electronic devices." @default.
- W3014154743 created "2020-04-10" @default.
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- W3014154743 date "2020-03-31" @default.
- W3014154743 modified "2023-09-27" @default.
- W3014154743 title "Universal Scaling and Signatures of Nodal Structures in Electron Tunneling from Two-Dimensional Semimetals" @default.
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