Charge dynamics of the spin-density-wave state in BaFe2As2

被引：23

作者：

Pfuner, F. ^{[1
]}

Analytis, J. G. ^{[2
,3
]}

Chu, J. -H. ^{[2
,3
]}

Fisher, I. R. ^{[2
,3
]}

Degiorgi, L. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Festkorperphys Lab, CH-8093 Zurich, Switzerland

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

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

来源：

EUROPEAN PHYSICAL JOURNAL B | 2009年 / 67卷 / 04期

关键词：

75.30.Fv Spin-density waves; 78.20.-e Optical properties of bulk materials and thin films;

D O I：

10.1140/epjb/e2009-00062-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on a thorough optical investigation of BaFe2As2 over a broad spectral range and as a function of temperature, focusing our attention on its spin-density-wave (SDW) phase transition at T-SDW = 135 K. While BaFe2As2 remains metallic at all temperatures, we observe a depletion in the far infrared energy interval of the optical conductivity below T-SDW, ascribed to the formation of a pseudogap-like feature in the excitation spectrum. This is accompanied by the narrowing of the Drude term consistent with the dc transport results and suggestive of suppression of scattering channels in the SDW state. About 20% of the spectral weight in the far infrared energy interval is affected by the SDW phase transition.

引用

页码：513 / 517

页数：5

共 20 条

[1] Electrodynamics of high-Tc superconductors [J].

Basov, DN ;

Timusk, T .

REVIEWS OF MODERN PHYSICS, 2005, 77 (02) :721-779

[2] Superconductivity at 43 K in SmFeAsO1-xFx [J].

Chen, X. H. ;

Wu, T. ;

Wu, G. ;

Liu, R. H. ;

Chen, H. ;

Fang, D. F. .

NATURE, 2008, 453 (7196) :761-762

[3] Competing orders and spin-density-wave instability in La(O1-xFx) FeAs [J].

Dong, J. ;

Zhang, H. J. ;

Xu, G. ;

Li, Z. ;

Li, G. ;

Hu, W. Z. ;

Wu, D. ;

Chen, G. F. ;

Dai, X. ;

Luo, J. L. ;

Fang, Z. ;

Wang, N. L. .

EPL, 2008, 83 (02)

[4]

Dressel M., 2002, Electrodynamics of Solids

[5] Origin of the Spin Density Wave Instability in AFe2As2 (A=Ba,Sr) as Revealed by Optical Spectroscopy [J].

Hu, W. Z. ;

Dong, J. ;

Li, G. ;

Li, Z. ;

Zheng, P. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 101 (25)

[6] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K [J].

Kamihara, Yoichi ;

Watanabe, Takumi ;

Hirano, Masahiro ;

Hosono, Hideo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) :3296-+

[7] Commensurate Itinerant Antiferromagnetism in BaFe2AS2: 75As-NMR Studies on a Self-Flux Grown Single Crystal [J].

Kitagawa, Kentaro ;

Katayama, Naoyuki ;

Ohgushi, Kenya ;

Yoshida, Makoto ;

Takigawa, Masashi .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (11)

[8] Probing the superconducting energy gap from infrared spectroscopy on a Ba0.6K0.4Fe2As2 single crystal with Tc=37 K [J].

Li, G. ;

Hu, W. Z. ;

Dong, J. ;

Li, Z. ;

Zheng, P. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 101 (10)

[9]

QAZILBASH MM, ARXIVCONDMAT08083748

[10] Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2 [J].

Rotter, Marianne ;

Tegel, Marcus ;

Johrendt, Dirk .

PHYSICAL REVIEW LETTERS, 2008, 101 (10)

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