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Author | Verberck, B.; Nikolaev, A.V.; Michel, K.H. | ||||
Title | Orientational charge density waves and the metal-insulator transition in polymerized KC60 | Type | A1 Journal article | ||
Year | 2004 | Publication | AIP conference proceedings | Abbreviated Journal | |
Volume | 723 | Issue | Pages | 339-342 | |
Keywords | A1 Journal article; Condensed Matter Theory (CMT) | ||||
Abstract | Polymerized KC60 undergoes a structural phase transition accompanied by a metal-insulator transition around 50 K. To explain the structural aspect, a mechanism involving small orientational deviations of the valence electron density on every C-60 monomer orientational charge density waves (OCDWs) – has already been proposed earlier. In the present work, we address the metal-insulator transition using the OCDW concept. We are inspired by the analogy between a polymer chain exhibiting an OCDW and a linear atomic chain undergoing a static lattice deformation doubling the unit cell: such a deformation implies a band gap at the zone boundary, yielding an insulating state (Peierls instability). Within our view, a similar mechanism occurs in polymerized KC60; the OCDW plays the role of the lattice deformation. We present tight-binding band structure calculations and conclude that the metal-insulator transition can indeed be explained using OCDWs, but that the threedimensionality of the crystal plays an unexpected key role. | ||||
Address | |||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | New York | Editor | ||
Language ![]() |
Wos | Publication Date | 0000-00-00 | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0094-243x | ISBN | Additional Links | UA library record; WoS full record; | |
Impact Factor | Times cited | Open Access | |||
Notes | Approved | Most recent IF: NA | |||
Call Number | UA @ lucian @ c:irua:94831 | Serial | 2513 | ||
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