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Pressure-induced shift of the photoluminescence band in single crystals of buckminster fullerene C60 and its implications for superconductivity in doped samples

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dc.contributor.author Sood, A K
dc.contributor.author Chandrabhas, N
dc.contributor.author Muthu, D V S
dc.contributor.author Jayaraman, A
dc.contributor.author Kumar, N
dc.contributor.author Krishnamurthy, H R
dc.contributor.author Pradeep, T
dc.contributor.author Rao, C N R
dc.date.accessioned 2012-12-03T06:10:24Z
dc.date.available 2012-12-03T06:10:24Z
dc.date.issued 1992-01
dc.identifier 0038-1098 en_US
dc.identifier.citation Solid State Communications 81(1), 89-92 (1992) en_US
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/1150
dc.description Restricted Access en_US
dc.description.abstract We report the first observation of a large pressure-induced red-shift of the photoluminescence band in single crystals of C60 and the associated colour change of the sample from red to black at 3.2 GPa. Interpreting the red shift of the luminescence band as a reduction of the bandgap Eg of the crystal, we get the pressure derivative ∂Eg/∂P = −0.138 eV/GPa. This result taken in conjunction with the known compressibility, gives the deformation potential ∂Eg/∂(ln a) = 6.0 eV, where ‘a’ is the lattice constant. Taking the same value for the alkali-doped fullerene, and combining it with the known pressure dependence of the transition temperature in the context of a single BCS expression for Tc we estimate the electron-phonon coupling parameter λ - 0.3. en_US
dc.description.uri http://dx.doi.org/10.1016/0038-1098(92)90577-V en_US
dc.language.iso en en_US
dc.publisher Pergamon-Elsevier Science Ltd en_US
dc.rights © 1992 Pergamon Press Ltd en_US
dc.subject buckminster fullerene C-60 en_US
dc.subject photoluminescence band en_US
dc.subject superconductivity en_US
dc.subject compressibility en_US
dc.title Pressure-induced shift of the photoluminescence band in single crystals of buckminster fullerene C60 and its implications for superconductivity in doped samples en_US
dc.type Article en_US


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