Theory of Coexisting Charge- and Spin-Density Waves in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo>(</mo><mi>TMTTF</mi><mo>)</mo><mrow><msub><mrow><mi></mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mi>B</mi><mi>r</mi><mo>,</mo><mi></mi><mo>(</mo><mi>TMTSF</mi><mo>)</mo><mrow><msub><mrow><mi></mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mi mathvariant="normal">PF</mi><mrow><msub><mrow><mi></mi></mrow><mrow><mn>6</mn></mrow></msub></mrow></math></span>, and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">α</mi><mi>−</mi><mo>(</mo><mi>BEDT</mi><mi>−</mi><mi>TTF</mi><mo>)</mo><mrow><msub><mrow><mi></mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mi mathvariant="italic">M</mi><mi>Hg</mi><mo>(</mo><mi>SCN</mi><mo>)</mo><mrow><msub><mrow><mi></mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span>

S. Mazumdar; S. Ramasesha; R. Torsten Clay; David K. Campbell

doi:10.1103/PhysRevLett.82.1522

Theory of Coexisting Charge- and Spin-Density Waves in $(TMTTF)_{2} B r, (TMTSF)_{2} PF_{6}$ , and $α - (BEDT - TTF)_{2} M Hg (SCN)_{4}$

S. Mazumdar, S. Ramasesha, R. Torsten Clay, and David K. Campbell

Phys. Rev. Lett. 82, 1522 – Published 15 February 1999

Abstract

Recent experiments indicate that the spin-density waves (SDWs) in $(TMT TF)_{2} Br, (TMTSF)_{2} PF_{6}$ , and $α - (BEDT - T TF)_{2} M Hg (SCN)_{4}$ 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 band filling within the starting Hamiltonian.