Superconductivity at 28 K in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Rb</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Rosseinsky, Matthew J.; Ramirez, A. P.; Glarum, S. H.; Murphy, D. W.; Haddon, Robert C.; Hebard, A. F.; Palstra, Thomas; Kortan, A. R.; Zahurak, S. M.; Makhija, A. V.

doi:10.1103/physrevlett.66.2830

Cited by 873 publications

(185 citation statements)

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“…Raman spectroscopy has been used as key tool to identify the line phases in fullerene intercalation compounds utilizing the linear red shift of the A g pinch mode with doping [106][107][108][109], as well as the EPC of the H g -derived coupling modes [109]. In comparison to classical superconductors, and in contrast to GICs the T c observed in fullerides is much higher ranging from 18 K in K 3 C 60 , 28 K for Rb 3 C 60 , and up to 39 K for Cs 3 C 60 which is the record transition temperature for organic superconductors so far [58][59][60].…”

Section: Feature Articlementioning

confidence: 99%

“…In 1991, the discovery of fullerene intercalation compounds known as "fullerides" added a new family of organic superconductors [57][58][59]. Fullerides revealed higher T c values compared to GICs ranging from 18 K for K 3 C 60 up-to 39 K for Cs 3 C 60 [58][59][60]. In 2007 Hlinka et al [61] discovered superconductivity in CaC 6 GICs with an elevated T c of 11.5 K renewing the interest in GICs.…”

Section: Superconductivity In Stage I Gic and Implications For Intercmentioning

confidence: 99%

“…By 1990's higher transition temperatures were observed for C 6 K, C 3 K, and C 2 Na with values of T c = 1.5, 3, and 5 K, respectively [56]. In 1991, the discovery of fullerene intercalation compounds known as "fullerides" added a new family of organic superconductors [57][58][59]. Fullerides revealed higher T c values compared to GICs ranging from 18 K for K 3 C 60 up-to 39 K for Cs 3 C 60 [58][59][60].…”

Section: Superconductivity In Stage I Gic and Implications For Intercmentioning

confidence: 99%

“…However, for fullerenes in contrast to graphite and carbon nanotubes a p-type doping was not possible so far because of the low electron affinity. In 1991 the first intercalation compounds with fullerenes (fullerides) where elaborated [104,58,57,59] the same way as performed in GICs. The excitement of using these new material at the time was promoted by the possibility to achieve higher transition temperatures for superconductivity, and the introduction of dopant ions into the crystal without disrupting the bonding environment in the fullerene sphere generating a tri-dimensional isotropic organic conductor [58].…”

Section: Feature Articlementioning

confidence: 99%

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Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Chacón-Torres

Wirtz

Pichler

2014

Physica Status Solidi (b)

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Graphite intercalation compounds (GICs) are an interesting and highly studied field since 1970's. It has gained renewed interest since the discovery of superconductivity at high temperature for CaC 6 and the rise of graphene. Intercalation is a technique used to introduce atoms or molecules into the structure of a host material. Intercalation of alkali metals in graphite has shown to be a controllable procedure recently used as a scalable technique for bulk production of graphene, and nano-ribbons by induced exfoliation of graphite. It also creates supra-molecular interactions between the host and the intercalant, inducing changes in the electronic, mechanical, and physical properties of the host. GICs are the mother system of intercalation also employed in fullerenes, carbon nanotubes, graphene, and carbon-composites. We will show how a combination of Raman and ab-initio calculations of the density and the electronic band structure in GICs can serve as a tool to elucidate the electronic structure, electron-phonon coupling, charge transfer, and lattice parameters of GICs and the graphene layers within. This knowledge of GICs is of high importance to understand superconductivity and to set the basis for applications with GICs, graphene and other nano-carbon based materials like nanocomposites in batteries and nanoelectronic devices.

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Section: Feature Articlementioning

confidence: 99%

Section: Superconductivity In Stage I Gic and Implications For Intercmentioning

confidence: 99%

Section: Superconductivity In Stage I Gic and Implications For Intercmentioning

confidence: 99%

Section: Feature Articlementioning

confidence: 99%

See 2 more Smart Citations

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Chacón-Torres

Wirtz

Pichler

2014

Physica Status Solidi (b)

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“…These results are extremely interesting in light of the discovery made in 1991 that alkali-doped A 3 C 60 compounds exhibit superconductivity with transition temperatures T c ∼18-28 K [6,7]. Since then, these fullerides have been the subject of great interest and other compounds with even higher T c values have been synthesized [8].…”

Section: Introductionmentioning

confidence: 81%

Jahn–Teller Effects in Molecules on Surfaces with Specific Application to C60

Hands

Dunn

Rawlinson

et al. 2009

Springer Series in Chemical Physics

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Abstract Scanning tunnelling microscopy (STM) is capable of imaging molecules adsorbed onto surfaces with sufficient resolution as to permit intramolecular features to be discerned. Therefore, imaging molecules subject to the Jahn-Teller (JT) effect could, in principle, yield valuable information about the vibronic coupling responsible for the JT effect. However, such an application is not without its complications. For example, the JT effect causes subtle, dynamic distortions of the molecule; but how will this dynamic picture be affected by the host surface? And what will actually be imaged by the rather slow STM technique? Our aim here is to present a systematic investigation of the complications inherent in JT-related STM studies, to seek out possible JT signatures in such images and to guide further imaging towards identification and quantification of JT effects in molecules on surfaces. In particular, we consider the case of surface-adsorbed C 60 ions because of their propensity to exhibit JT effects, their STM-friendly size and because a better understanding of the vibronic effects within these ions may be important for realisation of their potential application as superconductors.

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Investigation on the interaction on and the rotation of C60 in alkali-doped complexes AXA?3-XC60 (X = 1, 2, 3; A, A? = alkali)

Yan

Zhu

Wang

1996

Int. J. Quantum Chem.

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mThe interaction on and the rotation of C,, in akali-doped C,, solids, A,A!-,C,, (X = 1,2,3; A, A' = alkali), have been calculated with Buckingham potential model. The results show that the total interaction on C,, changes dramatically when the pure C,, solid is alkali-doped into K,C,,. The interaction on C,, in K,C,, is about 20 times greater than that in pure C,,. And the main component in the former, occupying > 90% is electrostatic, while in the latter, the main components, occupying > 90%, are dispersive and repulsive. The results also show that in contrast to the whole-region free rapid rotation of C,, molecule in its pure solid, the rotation of C, in K,C,, is mostly forbidden due to a 10 times increase (reaching about 300 kJ/mol) in potential barrier, except for the region from 0" to 50" where a broad, smooth, and shallow potential well exists. Calculations for alkali-doped complexes other than K,C,,, i.e., A xA',_ C,, (X = 1,2,3; A, A' = K, Rb, Cs), come to the same conclusion. Finally, an interesting and meaningful result is that the superconducting transition temperatures of A xA',_ C,, (X = 1,2,3; A, A' = K, Rb, Cs) change inversely with the total interactions on C, .

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Superconductivity at 28 K inRbxC60

Cited by 873 publications

References 7 publications

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Jahn–Teller Effects in Molecules on Surfaces with Specific Application to C60

Investigation on the interaction on and the rotation of C60 in alkali-doped complexes AXA?3-XC60 (X = 1, 2, 3; A, A? = alkali)

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