Anisotropic electric conductivity of delafossite PdCoO2 studied by angle-resolved photoemission spectroscopy.
Phys Rev Lett
; 102(25): 256404, 2009 Jun 26.
Article
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| MEDLINE
| ID: mdl-19659104
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.
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01-internacional
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2009
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Article