12–17 Jun 2016
University of Ottawa
America/Toronto timezone
Welcome to the 2016 CAP Congress! / Bienvenue au congrès de l'ACP 2016!

Metallization of a neutral organic radical by pressure

16 Jun 2016, 09:15
15m
SITE G0103 (University of Ottawa)

SITE G0103

University of Ottawa

SITE Building, 800 King Edward Ave, Ottawa, ON
Oral (Non-Student) / orale (non-étudiant) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) R1-2 Strongly Correlated Systems (DCMMP) / Systèmes fortement corrélés (DPMCM)

Speaker

Prof. Stephen Julian (University of Toronto)

Description

We have measured resistivity vs. temperature and pressure on the fluoro-substituted oxobenzene-bridged bisdithiazolyl radical, FBBO. This is a layered, single component organic compound that is a Mott insulator at ambient pressure, due to the singly occupied molecular orbitals and an intrinsically high inter-molecular charge transfer energy barrier. Previous room temperature infrared absorption and conductivity measurements suggest that the charge gap of 0.1eV closes and the sample may become metallic at pressures above 3GPa[1]. We report direct transport measurements under various pressures on powder samples of FBBO down to low temperature, measured in an anvil pressure cell, that demonstrate the first metallization of a neutral organic radical. [1] A. Mailman, et al., J. Am. Chem. Soc. 134, 9886 (2012). [2] D. Tian et al., J. Am. Chem. Soc. 137, 13146 (2015).

Primary author

Mr Di Tian (University of Toronto)

Co-authors

Dr Aaron Mailman (University of Jyvaskyla) Prof. John Tse (University of Saskatchewan) Prof. Richard Oakley (University of Waterloo) Prof. Stephen Julian (University of Toronto) Dr Steve Winter (University of Frankfurt)

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