TY - JOUR
T1 - The mixed peierls phase and metallic polyacetylene
AU - Horovitz, B.
N1 - Funding Information:
Acknowledgements — I thank Dr. M.J. Rice for suggesting the problem, and Professor A.J. Heeger for an enlightening account of the experimental situation. I have also benefitted from discussions with Professors K. Maki, N.P. Ong and S.E. Trullinger. This work was supported in part by Caltech President’s Fund under grant no. PF-142 and the National Science Foundation under grant no. DMR77-08445.
PY - 1980/1/1
Y1 - 1980/1/1
N2 - The Peierls condensate with density ρ{variant} near 1 electron per atom is studied and an effective phase-amplitude Hamiltonian is derived. It is shown that a Hartree-Fock theory removes the ρ{variant} → 1 singularity and the phase field exists even at ρ{variant} = 1. The charge carriers are attracting solitons and the lock-in transition is of first order. If ρ{variant} is fixed near 1 the condensate will separate into a commensurate phase (ρ{variant} = 1) and an incommensurate phase (ρ{variant} ≠ 1). These results can account for the unusual features of doped polyacetylene.
AB - The Peierls condensate with density ρ{variant} near 1 electron per atom is studied and an effective phase-amplitude Hamiltonian is derived. It is shown that a Hartree-Fock theory removes the ρ{variant} → 1 singularity and the phase field exists even at ρ{variant} = 1. The charge carriers are attracting solitons and the lock-in transition is of first order. If ρ{variant} is fixed near 1 the condensate will separate into a commensurate phase (ρ{variant} = 1) and an incommensurate phase (ρ{variant} ≠ 1). These results can account for the unusual features of doped polyacetylene.
UR - http://www.scopus.com/inward/record.url?scp=0019009499&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(80)90630-4
DO - 10.1016/0038-1098(80)90630-4
M3 - Article
AN - SCOPUS:0019009499
SN - 0038-1098
VL - 34
SP - 61
EP - 64
JO - Solid State Communications
JF - Solid State Communications
IS - 1
ER -