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Charge fluctuation of the superconducting molecular crystals
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Yamamoto, T., Nakazawa, Y., Kato, R., Yakushi, K., Akutsu, H., Akustu, A. S., Yamamoto, H., Kawamoto, A., Turner, Scott S. and Day, P. (2010) Charge fluctuation of the superconducting molecular crystals. In: 8th International Symposium on Crystalline Organic Metals Superconductors and Ferromagnets (ISCOM 2009)/64th Yamada Conference, Niseko, Japan, September 12-17, 2009. Published in: Physica B: Condensed Matter, Vol.405 (11 Suppl. S). S237-S239. doi:10.1016/j.physb.2009.11.059 ISSN 0921-4526.
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Official URL: http://dx.doi.org/10.1016/j.physb.2009.11.059
Abstract
In recent years concern has been raised about the charge fluctuation of the superconducting transition in the loosely dimerized molecular conductors Not only the observation of the charge fluctuation is of considerably important but also the understanding of the mechanism of the fluctuation We have observed degree of charge fluctuation of several beta ''-type ET salts The beta ''-type ET salt is one of the best model compounds because the direction of the largest inter-site Coulomb interaction is perpendicular to that of the largest transfer integral This structural property allows us to examine the role of inter-site Coulomb interaction from the viewpoint of the inter-molecular distance The difference in the molecular charges between the charge rich site and the charge poor sites Delta rho is correlated with the conducting behavior the superconducting materials have the small but finite Delta rho whereas Delta rho of the insulating (metallic) materials is large (almost zero) After the analysis of the configuration in the intermolecular distances, we have found that the degree of fluctuation Delta rho is attributed to the number of the most stable charge distribution(s) N-s and the number of the energy levels of the allowed charge distribution N-A The superconducting materials belong to the condition of N-s >= 2 and N-A >= 2 Indeed this condition contributes to the fluctuation of the molecular charges (C) 2009 Elsevier B V All rights reserved
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Journal or Publication Title: | Physica B: Condensed Matter | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 0921-4526 | ||||
Official Date: | 1 June 2010 | ||||
Dates: |
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Volume: | Vol.405 | ||||
Number: | 11 Suppl. S | ||||
Number of Pages: | 3 | ||||
Page Range: | S237-S239 | ||||
DOI: | 10.1016/j.physb.2009.11.059 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 8th International Symposium on Crystalline Organic Metals Superconductors and Ferromagnets (ISCOM 2009)/64th Yamada Conference | ||||
Type of Event: | Conference | ||||
Location of Event: | Niseko, Japan | ||||
Date(s) of Event: | September 12-17, 2009 |
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