title: Temperature-dependent Luttinger surfaces.
abstract: The Luttinger surface of an organic metal (TTF-TCNQ), possessing charge order and spin-charge separated band dispersions, is investigated using temperature-dependent angle-resolved photoemission spectroscopy. The Luttinger surface topology, obtained from momentum distribution curves, changes from quasi-2D (dimensional) to quasi-1D with temperature. The high temperature quasi-2D surface exhibits 4kF charge-density-wave (CDW) superstructure in the TCNQ derived holon band, in the absence of 2kF order. Decreasing temperature results in quasi-1D nested 2kF CDW order in the TCNQ spinon band and in the TTF surface. The results establish the link in momentum space between charge order and spin-charge separation in a Luttinger liquid.
authors.affiliation: The Institute of Physical and Chemical Research (RIKEN), Sayo-gun, Hyogo 679-5143, Japan. tito@ims.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Ito
authors.forename: A
authors.initials: A
authors.lastname: Chainani
authors.forename: T
authors.initials: T
authors.lastname: Haruna
authors.forename: K
authors.initials: K
authors.lastname: Kanai
authors.forename: T
authors.initials: T
authors.lastname: Yokoya
authors.forename: S
authors.initials: S
authors.lastname: Shin
authors.forename: R
authors.initials: R
authors.lastname: Kato