Quantum oscillations in the parent pnictide BaFe2As2: Itinerant electrons in the reconstructed state

被引：89

作者：

Analytis, James G. ^{[1
,2
,6
]}

McDonald, Ross D. ^{[3
]}

Chu, Jiun-Haw ^{[1
,2
,6
]}

Riggs, Scott C. ^{[3
]}

Bangura, Alimamy F. ^{[4
]}

Kucharczyk, Chris ^{[1
,2
,6
]}

Johannes, Michelle ^{[5
]}

Fisher, I. R. ^{[1
,2
,6
]}

机构：

[1] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[2] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[5] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA

[6] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

antiferromagnetic materials; barium compounds; Fermi surface; ground states; high-temperature superconductors; iron compounds; magnetic superconductors;

D O I：

10.1103/PhysRevB.80.064507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report quantum-oscillation measurements that enable the direct observation of the Fermi surface of the low-temperature ground state of BaFe2As2. From these measurements we characterize the low-energy excitations, revealing that the Fermi surface is reconstructed in the antiferromagnetic state, but leaving itinerant electrons in its wake. The present measurements are consistent with a conventional band folding picture of the antiferromagnetic ground state, placing important limits on the topology and size of the Fermi surface.

引用

页数：5

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