Spectroscopic indications of polaronic carriers in the quasi-one-dimensional conductor (TaSe4)(2)I
Angle-resolved photoemission (ARPES) on the quasi-one-dimensional conductor (TaSe4)(2)I shows a hidden Fermi-surface crossing in its metallic state and the opening of a Peierls gap at low temperatures, The underlying quasiparticles have vanishing spectral weight and extremely short coherence lengths. They are interpreted as polarons in the strong-coupling adiabatic Lin-Lit, and almost all their ARPES weight is incoherent. These observations suggest a scenario where the long-standing contradictions between ARPES and other experiments on Peierls materials could be resolved.
Keywords: ANGLE-RESOLVED PHOTOEMISSION ; METAL-INSULATOR-TRANSITION ; LUTTINGER-LIQUID BEHAVIOR ; FERMI-LIQUID ; ELECTRONIC-STRUCTURE ; PEIERLS ; TRANSITION ; LI0.9MO6O17 ; PSEUDOGAP ; SURFACE ; SOLIDS
Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland. ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, Switzerland. Univ Wisconsin, Ctr Synchrotron Radiat, Stoughton, WI 53589 USA. Univ Bayreuth, D-95440 Bayreuth, Germany. Perfetti, L, Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 496NA
Record created on 2006-10-03, modified on 2016-08-08