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Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - In situ electrical conductivity and Raman study of C60 tetragonal polymer at high pressures up to 30 GPa
AU - Mases, Mattias
AU - You, Shujie
AU - Weir, Samuel T.
AU - Evans, William J.
AU - Volkova, Yana
AU - Tebenkov, Alexander
AU - Babushkin, Alexey N.
AU - Vohra, Yogesh K.
AU - Samudrala, G.
AU - Soldatov, Alexander V.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Theory predicts that tetragonal polymeric C60 will undergo a phase transition into a metallic phase at pressures around 20 GPa. Raman and structural experiments at high pressures confirmed formation of a new phase above 20 GPa although the question about its electrical properties was still open. We report on the first simultaneous in situ study of vibrational and electrical properties of two-dimensional (2D) tetragonal C60 polymer at pressures up to 30 GPa in a diamond anvil cell (DAC) specially designed for this purpose. Our results reveal an anomaly in Raman spectra and a drop in electrical resistance of the sample at 20–25 GPa. We tentatively associate this anomalous behaviour with a phase transition into the conductive phase although its metallic character is yet to be proven. At high pressures the Raman spectra exhibit a high degree of disorder. Upon pressure release the order was partially restored and, more importantly, a significant amount of the initial 2D polymeric phase was recovered.
AB - Theory predicts that tetragonal polymeric C60 will undergo a phase transition into a metallic phase at pressures around 20 GPa. Raman and structural experiments at high pressures confirmed formation of a new phase above 20 GPa although the question about its electrical properties was still open. We report on the first simultaneous in situ study of vibrational and electrical properties of two-dimensional (2D) tetragonal C60 polymer at pressures up to 30 GPa in a diamond anvil cell (DAC) specially designed for this purpose. Our results reveal an anomaly in Raman spectra and a drop in electrical resistance of the sample at 20–25 GPa. We tentatively associate this anomalous behaviour with a phase transition into the conductive phase although its metallic character is yet to be proven. At high pressures the Raman spectra exhibit a high degree of disorder. Upon pressure release the order was partially restored and, more importantly, a significant amount of the initial 2D polymeric phase was recovered.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000285798400102
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=78649701115
U2 - 10.1002/pssb.201000298
DO - 10.1002/pssb.201000298
M3 - Article
VL - 247
SP - 3068
EP - 3071
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
SN - 0370-1972
IS - 11-12
ER -
ID: 37837240