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Sasaki T, Yoneyama N. Spatial mapping of electronic states in κ-(BEDT-TTF) 2X using infrared reflectivity. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2009; 10:024306. [PMID: 27877279 PMCID: PMC5090436 DOI: 10.1088/1468-6996/10/2/024306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 07/06/2009] [Accepted: 01/19/2009] [Indexed: 06/03/2023]
Abstract
We review our recent work on spatial inhomogeneity of the electronic states in the strongly correlated molecular conductors κ-(BEDT-TTF)2X. Spatial mapping of infrared spectra (SMIS) is used for imaging the distribution of the local electronic states. In molecular materials, the infrared response of the specific molecular vibration mode with a strong electron-molecular vibration coupling can reflect the electronic states via the change in the vibration frequency. By spatially mapping the frequency shift of the molecular vibration mode, an electronic phase separation has been visualized near the first-order Mott transition in the bandwidth-controlled organic conductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. In addition to reviewing SMIS of the phase separation, we briefly mention the electronic and optical properties of κ-(BEDT-TTF)2X.
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Affiliation(s)
- Takahiko Sasaki
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- JST, CREST, Sanbancho 5, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Naoki Yoneyama
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- JST, CREST, Sanbancho 5, Chiyoda-ku, Tokyo 102-0075, Japan
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Bartlett PN, Essex JW, Koo HJ, Nandhakumar IS, Robertson N, Whangbo MH. Molecular Self-Assembly on Surfaces of Organic Conducting Salts: Epitaxial Monolayer Films of Naphthalene on the (001) Surface of (TMTSF)2PF6. J Phys Chem B 2000. [DOI: 10.1021/jp000013z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. N. Bartlett
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
| | - J. W. Essex
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
| | - H.-J. Koo
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
| | - I. S. Nandhakumar
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
| | - N. Robertson
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
| | - M.-H. Whangbo
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K., Department of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K., and Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204
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Chan LP, Lynn KG, Harshman DR, Haddon RC. Two-dimensional angular-correlation-of-annihilation-radiation study of kappa -(BEDT-TTF)2Cu(NCS)2. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:10393-10396. [PMID: 9975136 DOI: 10.1103/physrevb.50.10393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Campos CE, Dubois JG, Gerritsen JW, Tibbitts TT, Brooks JS, Tokumoto M, Kinoshita N, Tanaka Y. Anion or cation molecular layers: Two distinct surfaces in scanning tunneling microscopy images from the organic salt (ET)2KHg(SCN)4. PHYSICAL REVIEW LETTERS 1993; 71:1720-1723. [PMID: 10054481 DOI: 10.1103/physrevlett.71.1720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Yoon S, Smith WF, Yoo M, deLozanne AL, Fainchtein R, Kistenmacher TJ, D'Arcangelis ST, Cowan DO. Anisotropy in the bc plane of the organic superconductor kappa -(BEDT-TTF)2Cu(NCS)2 revealed by scanning tunneling microscopy and atomic force microscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:4802-4805. [PMID: 10006635 DOI: 10.1103/physrevb.47.4802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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