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Disordered RuO2 exhibits two dimensional, low-mobility transport and a metal-insulator transition.


ABSTRACT: The discovery of low-dimensional metallic systems such as high-mobility metal oxide field-effect transistors, the cuprate superconductors, and conducting oxide interfaces (e.g., LaAlO3/SrTiO3) has stimulated research into the nature of electronic transport in two-dimensional systems given that the seminal theory for transport in disordered metals predicts that the metallic state cannot exist in two dimensions (2D). In this report, we demonstrate the existence of a metal-insulator transition (MIT) in highly disordered RuO2 nanoskins with carrier concentrations that are one-to-six orders of magnitude higher and with mobilities that are one-to-six orders of magnitude lower than those reported previously for 2D oxides. The presence of an MIT and the accompanying atypical electronic characteristics place this form of the oxide in a highly diffusive, strong disorder regime and establishes the existence of a metallic state in 2D that is analogous to the three-dimensional case.

SUBMITTER: Osofsky MS 

PROVIDER: S-EPMC4768250 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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The dynamic Colombian sign language dataset for basic conversation LSC70.

Muñoz Galindez Jader Alejandro JA   Villota Coral Leidy Verónica LV   Vargas Cañas Rubiel R  

Data in brief 20241207


Sign language is a form of non-verbal communication used by people with hearing disability. This form of communication relies on the use of signs, gestures, facial expressions, and more. Considering that in Colombia, the population with hearing impairments is around half a million, a database of dynamic, alphanumeric signs and commonly used words was created to establish a basic conversation. For this purpose, 70 non-expert volunteers in Colombian Sign Language participated, and they were record  ...[more]

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