Signatures of the spin-phonon coupling in Fe1+yTe1-xSex alloys

被引：15

作者：

Popovic, Z. V. ^{[1
]}

Lazarevic, N. ^{[1
]}

Bogdanovic, S. ^{[1
]}

Radonjic, M. M. ^{[2
]}

Tanaskovic, D. ^{[2
]}

Hu, Rongwei ^{[3
]}

Lei, Hechang ^{[3
]}

Petrovic, C. ^{[3
]}

机构：

[1] Univ Belgrade, Inst Phys Belgrade, Ctr Solid State Phys & New Mat, Belgrade 11080, Serbia

[2] Univ Belgrade, Inst Phys Belgrade, Comp Sci Lab, Belgrade 11080, Serbia

[3] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

SOLID STATE COMMUNICATIONS | 2014年 / 193卷

关键词：

Magnetically ordered materials; Crystal structure and symmetry; Phonos; Inelastic light scattering; 1ST-PRINCIPLES CALCULATIONS; SUPERCONDUCTIVITY;

D O I：

10.1016/j.ssc.2014.05.025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman scattering spectra of Fe1+yTe1-xSex (x=0, y=0.07; x=0.1, y=0.05 and x=0.4, y=0.02) alloys are measured in a temperature range between 20 K and 300 K. The A(1g) and B-1g Raman active modes have been experimentally observed at energies 156 and 198 cm(-1), which is in rather good agreement with the lattice dynamics calculation. The antiferromagnetic spin ordering below 70 K in Fe1.07Te leaves a fingerprint only in the B-1g phonon mode linewidth and energy, whose temperature dependence follows the normalized magnetic susceptibility, indicating the presence of the spin-phonon coupling. The frequency and the linewidth of the A(1g) mode assume a conventional anharmonic temperature dependence in all measured samples, which is also the case for the B-1g mode in the Se doped samples. The linewidth (energy) of the A(1g) mode decreases (increases) with doping, whereas the opposite is seen for the B-1g mode. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：51 / 55

页数：5

共 36 条

[1]

[Anonymous], J PHYS CONDENS MATTE

[2] ANHARMONIC EFFECTS IN LIGHT-SCATTERING DUE TO OPTICAL PHONONS IN SILICON [J].

BALKANSKI, M ;

WALLIS, RF ;

HARO, E .

PHYSICAL REVIEW B, 1983, 28 (04) :1928-1934

[3] Tunable (δπ, δπ)-Type Antiferromagnetic Order in α-Fe(Te,Se) Superconductors [J].

Bao, Wei ;

Qiu, Y. ;

Huang, Q. ;

Green, M. A. ;

Zajdel, P. ;

Fitzsimmons, M. R. ;

Zhernenkov, M. ;

Chang, S. ;

Fang, Minghu ;

Qian, B. ;

Vehstedt, E. K. ;

Yang, Jinhu ;

Pham, H. M. ;

Spinu, L. ;

Mao, Z. Q. .

PHYSICAL REVIEW LETTERS, 2009, 102 (24)

[4] Phonons and related crystal properties from density-functional perturbation theory [J].

Baroni, S ;

de Gironcoli, S ;

Dal Corso, A ;

Giannozzi, P .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :515-562

[5] Spin-resolved electron-phonon coupling in FeSe and KFe2Se2 [J].

Bazhirov, Timur ;

Cohen, Marvin L. .

PHYSICAL REVIEW B, 2012, 86 (13)

[6] Phonon self-energies in semiconductors: anharmonic and isotopic contributions [J].

Cardona, M ;

Ruf, T .

SOLID STATE COMMUNICATIONS, 2001, 117 (03) :201-212

[7] Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82 [J].

Fang, M. H. ;

Pham, H. M. ;

Qian, B. ;

Liu, T. J. ;

Vehstedt, E. K. ;

Liu, Y. ;

Spinu, L. ;

Mao, Z. Q. .

PHYSICAL REVIEW B, 2008, 78 (22)

[8] Anomalous optical phonons in FeTe chalcogenides: Spin state, magnetic order, and lattice anharmonicity [J].

Gnezdilov, V. ;

Pashkevich, Yu. ;

Lemmens, P. ;

Gusev, A. ;

Lamonova, K. ;

Shevtsova, T. ;

Vitebskiy, I. ;

Afanasiev, O. ;

Gnatchenko, S. ;

Tsurkan, V. ;

Deisenhofer, J. ;

Loidl, A. .

PHYSICAL REVIEW B, 2011, 83 (24)

[9] Interplay between lattice and spin states degree of freedom in the FeSe superconductor: Dynamic spin state instabilities [J].

Gnezdilov, Vladimir ;

Pashkevich, Yurii G. ;

Lemmens, Peter ;

Wulferding, Dirk ;

Shevtsova, Tatiana ;

Gusev, Alexander ;

Chareev, Dmitry ;

Vasiliev, Alexander .

PHYSICAL REVIEW B, 2013, 87 (14)

[10] Superconductivity in the iron selenide KxFe2Se2 (0 ≤x≤1.0) [J].

Guo, Jiangang ;

Jin, Shifeng ;

Wang, Gang ;

Wang, Shunchong ;

Zhu, Kaixing ;

Zhou, Tingting ;

He, Meng ;

Chen, Xiaolong .

PHYSICAL REVIEW B, 2010, 82 (18)

← 1 2 3 4 →