Interplay between superconductivity and charge order in 2D organic superconductors
Creators
- 1. 1. Physikalisches Institut, Universitaet Stuttgart (Germany)
- 2. KBFI, Tallinn (Estonia)
- 3. INSTM-UdR, Parma (Italy)
- 4. Dipt. Chimica, G.I.F., Parma (Italy)
- 5. Material Science Division, Argonne National Laboratory (United States)
Description
Theoretical study of systems with quarter-filled conductance band and strong electron-electron correlations propose superconductivity mediated by charge order fluctuations. We present IR reflectivity of a 1/4-filled organic superconductor β''-(BEDT-TTF)2SF5CH2CF2SO3 (Tc=5 K) in the frequency range between 8 and 10000 cm-1 at temperatures down to 1.8 K. Our spectroscopic study reveals a splitting of the charge-sensitive phonons showing charge order while transport properties show metallic behavior. The narrow Drude response and its interplay with charge fluctuations, evident in an electronic band, is responsible for superconductivity, with a superconducting gap of 12 cm-1 at 1.8 K. A comparison with the isostructural metal β''-(BEDT-TTF)2SF5CHFSO3 reflects the close relation between superconductivity and charge order.
Additional details
Identifiers
Publishing Information
- Journal Title
- Verhandlungen der Deutschen Physikalischen Gesellschaft
- Journal Issue
- Dresden 2009 issue
- Series
- Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 44(5)
- Journal Page Range
- [1 p.]
- ISSN
- 0420-0195
- CODEN
- VDPEAZ
Conference
- Title
- DPG Spring meeting 2009 of the condensed matter section with the divisions biological physics, chemical and polymer physics, dielectric solids, dynamics and statistical physics, low temperature physics, magnetism, metal and material physics, semiconductor physics, surface science, thin films, vacuum science and technology as well as the working groups industry and business, physics of socio-economic systems
- Dates
- 22-27 Mar 2009
- Place
- Dresden (Germany)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 41043532
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BAND THEORY; BEDT-TTF; ELECTRONIC STRUCTURE; ENERGY GAP; FLUCTUATIONS; INFRARED SPECTRA; ORGANIC FLUORINE COMPOUNDS; ORGANIC SULFUR COMPOUNDS; PHONONS; SPECTRAL REFLECTANCE; SUPERCONDUCTIVITY; TEMPERATURE RANGE 0000-0013 K
- Descriptors DEC
- ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; HETEROCYCLIC COMPOUNDS; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC SULFUR COMPOUNDS; ORGANIC SUPERCONDUCTORS; PHYSICAL PROPERTIES; QUASI PARTICLES; SPECTRA; SUPERCONDUCTORS; TEMPERATURE RANGE; VARIATIONS
Optional Information
- Notes
- Session: TT 33.12 Mi 14:00; No further information available