title: Anisotropic electric conductivity of delafossite PdCoO2 studied by angle-resolved photoemission spectroscopy.
abstract: An explicit connection between the electronic structure and the anisotropic high conductivity of delafossite-type PdCoO2 has been established by angle-resolved photoemission spectroscopy (ARPES) and core-level x-ray photoemission spectroscopy. The ARPES spectra show that a large hexagonal electronlike Fermi surface (FS) consists of very dispersive Pd 4d states. The carrier velocity and lifetime are determined from the ARPES data, and the conductivity is calculated by a solution of the Boltzmann equation, which demonstrates that the high anisotropic conductivity originates from the high carrier velocity, the large two-dimensional FS, and the long lifetime of the carriers.
authors: Department of Physics, Chonnam National University, Gwangju 500-757, Korea. ffnhj@chonnam.ac.kr
authors: Han-Jin
authors: HJ
authors: Noh
authors: Jinwon
authors: J
authors: Jeong
authors: Jinhwan
authors: J
authors: Jeong
authors: En-Jin
authors: EJ
authors: Cho
authors: Sung Baek
authors: SB
authors: Kim
authors: Kyoo
authors: K
authors: Kim
authors: B I
authors: BI
authors: Min
authors: Hyeong-Do
authors: HD
authors: Kim