Theory of Coexisting Charge and Spin-Density Waves in (TMTTF)2Br, (TMTSF)2PF6 and alpha-(BEDT-TTF)2MHg(SCN)4
S. Mazumdar, S. Ramasesha, R. T. Clay, D. K. Campbell
Abstract
Recent experiments indicate that the spin-density waves (SDWs) in (TMTTF)2Br, (TMTSF)2PF6 and alpha-(BEDT-TTF)2MHg(SCN)4 are highly unconventional and coexist with charge-density waves (CDWs). We present a microscopic theory of this unusual CDW-SDW coexistence. A complete understanding requires the explicit inclusion of strong Coulomb interactions, lattice discreteness, the anisotropic two-dimensional nature of the lattice, and the correct bandfilling within the starting Hamiltonian.
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