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Electromechanical Properties of Graphene Drumheads
Klimov, N. N.,Jung, S.,Zhu, S.,Li, T.,Wright, C. A.,Solares, S. D.,Newell, D. B.,Zhitenev, N. B.,Stroscio, J. A. American Association for the Advancement of Scienc 2012 Science Vol.336 No.6088
<P>We determined the electromechanical properties of a suspended graphene layer by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements, as well as computational simulations of the graphene-membrane mechanics and morphology. A graphene membrane was continuously deformed by controlling the competing interactions with a STM probe tip and the electric field from a back-gate electrode. The probe tip-induced deformation created a localized strain field in the graphene lattice. STS measurements on the deformed suspended graphene display an electronic spectrum completely different from that of graphene supported by a substrate. The spectrum indicates the formation of a spatially confined quantum dot, in agreement with recent predictions of confinement by strain-induced pseudomagnetic fields.</P>
Creating nanostructured superconductors on demand by local current annealing
Baek, Hongwoo,Ha, Jeonghoon,Zhang, Duming,Natarajan, Bharath,Winterstein, Jonathan P.,Sharma, Renu,Hu, Rongwei,Wang, Kefeng,Ziemak, Steven,Paglione, Johnpierre,Kuk, Young,Zhitenev, Nikolai B.,Stroscio American Physical Society 2015 Physical review. B, Condensed matter and materials Vol.92 No.9