Bandwidth tuning triggers interplay of charge order and superconductivity in two-dimensional organic materials
We observe charge-order fluctuations in the quasi-two-dimensional organic superconductor β''-(BEDT-TTF)2SF5CH2CF2SO3, both by means of vibrational spectroscopy, locally probing the fluctuating charge order, and by investigating the in-plane dynamical response by infrared reflectance spectr...
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Published in | Physical review letters Vol. 105; no. 20; p. 206402 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
09.11.2010
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Online Access | Get more information |
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Summary: | We observe charge-order fluctuations in the quasi-two-dimensional organic superconductor β''-(BEDT-TTF)2SF5CH2CF2SO3, both by means of vibrational spectroscopy, locally probing the fluctuating charge order, and by investigating the in-plane dynamical response by infrared reflectance spectroscopy. The decrease of the effective electronic interaction in an isostructural metal suppresses both charge-order fluctuations and superconductivity, pointing to their interplay. We compare the results of our experiments with calculations on the extended Hubbard model. |
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ISSN: | 1079-7114 |
DOI: | 10.1103/physrevlett.105.206402 |