Interplay between electronic and structural degrees of freedom in quarter-filled low dimensional conductors
作者： Jean-Paul Pouget
DOI: 10.1016/J.PHYSB.2014.11.037
关键词: Condensed matter physics 、 Charge ordering 、 Charge density wave 、 Polarization (waves) 、 Bond order 、 Fermi surface 、 Charge (physics) 、 Physics 、 Degrees of freedom (physics and chemistry) 、 Ion
摘要: We review the basic aspects of charge density wave (CDW) and bond order (BOW) instabilities observed in one dimension (1D) organic conductors at either 2kF and/or 4kF critical vectors. start by recalling main features coupled structural/electronic Peierls donor–acceptor (D–A) transfer (CT) salts. Then we consider specific case 2:1 salts D2X where X is a monovalent anion. show that incipient CDW/BOW Bechgaard Fabre are those parent quarter-filled CT TMTSF-DMTCNQ TMTTF-DMTCNQ respectively. also more specifically influence such as stack dimerization, Fermi surface warping coupling to anions. discuss generally role anions pointing out polarization displacement induced anion shift. Finally some these relevant understand subtle interplay between structural electronic degrees freedom 2D (BEDT-TTF)2X series.
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