Anisotropic Electric Conductivity of Delafossite PdCoO2 Studied by Angle-Resolved Photoemission Spectroscopy

被引：77

作者：

Noh, Han-Jin ^{[1
]}

Jeong, Jinwon ^{[1
]}

Jeong, Jinhwan ^{[1
]}

Cho, En-Jin ^{[1
]}

Kim, Sung Baek ^{[2
,3
]}

Kim, Kyoo ^{[4
]}

Min, B. I. ^{[4
]}

Kim, Hyeong-Do ^{[5
]}

机构：

[1] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea

[2] POSTECH, Lab Pohang Emergent Mat, Pohang 790784, South Korea

[3] POSTECH, Dept Phys, Pohang 790784, South Korea

[4] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

[5] Pohang Univ Sci & Technol, Pohang Accelerator Lab, Pohang 790784, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 25期

关键词：

TRANSPARENT THIN-FILMS; X-RAY PHOTOEMISSION; METALLIC CONDUCTIVITY; SPECTRA; CUALO2;

D O I：

10.1103/PhysRevLett.102.256404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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