Temperature dependence and resonance effects in Raman scattering of phonons in NdFeAsOxF1-x single crystals

被引：28

作者：

Gallais, Y. ^{[1
]}

Sacuto, A. ^{[1
]}

Cazayous, M. ^{[1
]}

Cheng, P. ^{[2
]}

Fang, L. ^{[2
]}

Wen, H. H. ^{[2
]}

机构：

[1] Univ Paris 07, CNRS, UMR 7162, MPQ, F-75205 Paris 13, France

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.78.132509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report plane-polarized Raman-scattering spectra of iron oxypnictide superconductor NdFeAsO(1-x)F(x) single crystals with varying fluorine x content. The spectra exhibit sharp and symmetrical phonon lines with a weak dependence on fluorine doping x. The temperature dependence does not show any phonon anomaly at the superconducting transition. The Fe related phonon intensity shows a strong resonant enhancement below 2 eV. We associate the resonant enhancement to the presence of an interband transition around 2 eV observed in optical conductivity. Our results point to a rather weak coupling between Raman-active phonons and electronic excitations in iron oxypnictides superconductors.

引用

页数：4

共 34 条

[1]

ALIREZA PL, J PHYS COND IN PRESS

[2] TEMPERATURE DEPENDENCES OF THE 340-CM-1, 440-CM-1, AND 500-CM-1 RAMAN MODES OF YBA2CU3OY FOR 6.7-LESS-THAN-OR-EQUAL-TO-Y-LESS-THAN-OR-EQUAL-TO-7.0 [J].

ALTENDORF, E ;

CHEN, XK ;

IRWIN, JC ;

LIANG, R ;

HARDY, WN .

PHYSICAL REVIEW B, 1993, 47 (13) :8140-8150

[3] Is LaFeAsO1-xFx an electron-phonon superconductor? [J].

Boeri, L. ;

Dolgov, O. V. ;

Golubov, A. A. .

PHYSICAL REVIEW LETTERS, 2008, 101 (02)

[4] Magnetic order of the iron spins in NdFeAsO [J].

Chen, Ying ;

Lynn, J. W. ;

Li, J. ;

Li, G. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. ;

Dai, Pengcheng ;

dela Cruz, C. ;

Mook, H. A. .

PHYSICAL REVIEW B, 2008, 78 (06)

[5] GAP ANISOTROPY AND PHONON SELF-ENERGY EFFECTS IN SINGLE-CRYSTAL YBA2CU3O7-DELTA [J].

COOPER, SL ;

SLAKEY, F ;

KLEIN, MV ;

RICE, JP ;

BUKOWSKI, ED ;

GINSBERG, DM .

PHYSICAL REVIEW B, 1988, 38 (16) :11934-11937

[6] Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems [J].

de la Cruz, Clarina ;

Huang, Q. ;

Lynn, J. W. ;

Li, Jiying ;

Ratcliff, W., II ;

Zarestky, J. L. ;

Mook, H. A. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. ;

Dai, Pengcheng .

NATURE, 2008, 453 (7197) :899-902

[7] Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2 [J].

Ding, H. ;

Richard, P. ;

Nakayama, K. ;

Sugawara, K. ;

Arakane, T. ;

Sekiba, Y. ;

Takayama, A. ;

Souma, S. ;

Sato, T. ;

Takahashi, T. ;

Wang, Z. ;

Dai, X. ;

Fang, Z. ;

Chen, G. F. ;

Luo, J. L. ;

Wang, N. L. .

EPL, 2008, 83 (04)

[8]

Drechsler S., ARXIV08051321

[9]

ESCHRIG H, ARXIV08040186

[10] DETERMINATION OF THE SUPERCONDUCTING GAP IN RBA2CU3O7-DELTA [J].

FRIEDL, B ;

THOMSEN, C ;

CARDONA, M .

PHYSICAL REVIEW LETTERS, 1990, 65 (07) :915-918

← 1 2 3 4 →