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Brouet V, Alloul H, Le TN, Garaj S, Forró L. Role of dynamic Jahn-Teller distortions in Na2C60 and Na2CsC60 studied by NMR. PHYSICAL REVIEW LETTERS 2001; 86:4680-4683. [PMID: 11384313 DOI: 10.1103/physrevlett.86.4680] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2000] [Indexed: 05/23/2023]
Abstract
Through 13C NMR spin lattice relaxation ( T1) measurements in cubic Na2C60, we detect a gap in its electronic excitations, similar to that observed in tetragonal A4C60. This establishes that Jahn-Teller distortions (JTD) and strong electronic correlations must be considered to understand the behavior of even electron systems, regardless of the structure. Furthermore, in metallic Na2CsC60, a similar contribution to T1 is also detected for 13C and 133Cs NMR, implying the occurrence of excitations typical of JT distorted C( 2-)60 (or equivalently C( 4-)60). This supports the idea that dynamic JTD can induce attractive electronic interactions in odd electron systems.
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Affiliation(s)
- V Brouet
- Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, Bâtiment 510, 91 405 Orsay, France
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Pressure and Temperature Evolution of the Structure of the Superconducting Na2CsC60 Fulleride. J SOLID STATE CHEM 1999. [DOI: 10.1006/jssc.1998.8159] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Prassides K, Vavekis K, Kordatos K, Tanigaki K, Bendele GM, Stephens PW. Loss of Cubic Symmetry in Low-Temperature Na2RbC60. J Am Chem Soc 1997. [DOI: 10.1021/ja9634076] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kosmas Prassides
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
| | - Konstantinos Vavekis
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
| | - Konstantinos Kordatos
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
| | - Katsumi Tanigaki
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
| | - Götz M. Bendele
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
| | - Peter W. Stephens
- School of Chemistry, Physics and Enviromental Science University of Sussex, Brighton BN1 9QJ, U.K. NEC Fundamental Research Laboratories Tsukuba 305, Japan Department of Physics, State University of New York Stony Brook, New York 11794 National Synchrotron Light Source Brookhaven National Laboratory, Upton, New York 11973
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Maniwa Y, Sugiura D, Kume K, Kikuchi K, Suzuki S, Achiba Y, Hirosawa I, Tanigaki K, Shimoda H, Iwasa Y. Determination of 13C NMR isotropic Knight shift and deviation from BCS relation in A3C60 superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R6861-R6864. [PMID: 9984399 DOI: 10.1103/physrevb.54.r6861] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yildirim T, Barbedette L, Fischer JE, Lin CL, Robert J, Petit P, Palstra TT. Tc vs Carrier Concentration in Cubic Fulleride Superconductors. PHYSICAL REVIEW LETTERS 1996; 77:167-170. [PMID: 10061798 DOI: 10.1103/physrevlett.77.167] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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