| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Evolution of the 128-cm-1 Raman phonon mode with temperature in Ba(Fe1-xCox)2As 2 (x = 0.065 and 0.2) |
| Yang Yan-Xing (杨彦兴)a b, Gallais Yannb, Fang Zhi-Hao (方之颢)a, Shi Jing (石兢)a, Xiong Rui (熊锐)a |
a School of Physics and Technology, Wuhan University, Wuhan 430072, China;
b Laboratoire Matériaux et Phénomenes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France |
|
|
|
|
Abstract We report electronic Raman scattering measurements on Ba(Fe1-xCox)2As2 (x = 0.065 and 0.2) single crystals with Raman shifts from 9 cm-1 up to 600 cm-1 in the symmetry of B1g with respect to 1 Fe unit cell. When the crystals are cooled down, the evident quasielastic peaks of Raman spectra occur only in the crystal with x = 0.065, which is due to the contribution of orbital ordering between xz and yz Fe 3d orbitals, as we reported in another work. Here, we analyze the Eg phonon at 128 cm-1, which has the same function form of its Raman tensors as those of xz and yz Fe 3d orbitals in these two crystals respectively. Unlike their electronic continuums, no anomalies are found in the Eg phonons of these two samples, which simply follows the expressions corresponding to the anharmonic phonon decay into acoustic phonons with the same frequencies and opposite momenta. Our results indicate that the structural and magnetic phase transition might be completely suppressed by chemical doping and there is not any indication of coupling between charge nematicity and Eg phonon mode from our experimental results, which is consistent with the results in our previous work.
|
Received: 24 September 2014
Revised: 10 October 2014
Accepted manuscript online:
|
|
PACS:
|
74.70.Xa
|
(Pnictides and chalcogenides)
|
| |
78.30.-j
|
(Infrared and Raman spectra)
|
| |
74.25.nd
|
(Raman and optical spectroscopy)
|
|
| Fund: Project supported by the Agence Nationale de la Recherche through Grant PNICTIDES. |
Corresponding Authors:
Xiong Rui
E-mail: xiongrui@whu.edu.cn
|
Cite this article:
Yang Yan-Xing (杨彦兴), Gallais Yann, Fang Zhi-Hao (方之颢), Shi Jing (石兢), Xiong Rui (熊锐) Evolution of the 128-cm-1 Raman phonon mode with temperature in Ba(Fe1-xCox)2As 2 (x = 0.065 and 0.2) 2015 Chin. Phys. B 24 027401
|
| [1] |
Kamihara Y, Watanabe T, Hirano M and Hosono H 2008 J. Am. Chem. Soc. 130 3296
|
| [2] |
Rotter M, Tegel M and Johrendt D 2008 Phys. Rev. Lett. 101 107006
|
| [3] |
Sefat A S, Jin R, McGuire M A, Sales B C, Singh D J and Mandrus D 2008 Phys. Rev. Lett. 101 117004
|
| [4] |
Schafgans A A, Pursley B C, LaForge A D, Sefat A S, Mandrus D and Basov D N 2011 Phys. Rev. B 84 052501
|
| [5] |
Chauvière L, Gallais Y, Cazayous M, Méasson M A, Sacuto A, Colson D and Forget A 2011 Phys. Rev. B 84 104508
|
| [6] |
Chu J H, Analytis J G, Greve K D, McMahon P L, Islam Z, Yamamoto Y and Fisher I R 2010 Science 329 824
|
| [7] |
Fernandes R M, Chubukov A V and Schmalian J 2014 Nat. Phys. 10 97
|
| [8] |
Kivelson S A, Fradkin E and Emery V J 1998 Nature 393 550
|
| [9] |
Lilly M P, Cooper K B, Eisenstein J P, Pfeiffer L N and West K W 1999 Phys. Rev. Lett. 82 394
|
| [10] |
Kivelson S A, Blindloss I P, Fradkin E, Oganesyan V, Tranquada J M, Kapitulnik A and Howald C 2003 Rev. Mod. Phys. 75 1201
|
| [11] |
Daou R, Chang J, LeBoeuf D, Cyr-Choiniére O, Laliberté F, Doiron-Leyraud N, Ramshaw B J, Liang R, Bonn D A, Hardy W N and Taillefer L 2010 Nature 463 519
|
| [12] |
Borzi R A, Grigera S A, Farrel J, Lister S J S, Lee S L, Tennant D A, Maeno Y and Mckenzie A P 2007 Science 315 214
|
| [13] |
Okazaki R, Shibauchi T, Shi H J, Haga Y, Matsuda T D, Yamamoto E, Onuki Y, Ikeda H and Mastuda Y 2011 Science 331 439
|
| [14] |
Gallais Y, Fernandes R M, Paul I, Chauvière L, Yang Y X, Méasson M A, Cazayous M, Sacuto A, Colson D and Forget A 2013 Phys. Rev. Lett. 111 267001
|
| [15] |
Yang Y X, Gallas Y, Fernandes R M, Paul I, Chauvière L, Méasson M A, Cazayous M, Sacuto A, Colson D and Forget A 2014 JPS Conf. Proc. 3 015001
|
| [16] |
Rullier-Albenque F, Colson D, Forget A and Alloul H 2009 Phys. Rev. Lett. 103 057001
|
| [17] |
Litvinchuk A P, Hadjiev V G, Iliev M N, Lv B, Guloy A M and Chu C W 2008 Phys. Rev. B 78 060503
|
| [18] |
Chauvière L, Gallais Y, Cazayous M, Sacuto A, Méasson M A, Colson D and Forget A 2009 Phys. Rev. B 80 094504
|
| [19] |
Lv W, Wu J and Phillips P 2009 Phys. Rev. B 80 224506
|
| [20] |
Klemmens P G 1966 Phys. Rev. 148 845
|
| [21] |
Menéndez J and Cardona M 1984 Phys. Rev. B 29 2051
|
| [22] |
Dai Y M, Xu B, Shen B, Xiao H, Lobo R P S M and Qiu X G 2012 Chin. Phys. B 21 077403
|
| [23] |
Yu S L and Li J X 2013 Chin. Phys. B 22 087411
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
