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Volumn 82, Issue 1, 2010, Pages

Lattice dynamical probe of charge order and antipolar bilayer stacking in LuFe2 O4

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[No Author keywords available]

Indexed keywords


EID: 77956546416     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.82.014304     Document Type: Article
Times cited : (40)

References (44)
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  • 16
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    • Harris, A.B.1    Yildirim, T.2
  • 19
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    • We describe the magnetic arrangement as "antipolar" rather than "antiferroelectric" (which is sometimes used in the literature and may be more widely known) in order to clearly indicate the lack of electric field switchability in LuFe2 O4.
    • We describe the magnetic arrangement as "antipolar" rather than "antiferroelectric" (which is sometimes used in the literature and may be more widely known) in order to clearly indicate the lack of electric field switchability in LuFe 2 O 4.
  • 20
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    • Our measurements were carried out at a 6°angle of incidence with respect to an aluminum mirror. The resulting reflectance was corrected for the finite reflectance of aluminum.
    • Our measurements were carried out at a 6°angle of incidence with respect to an aluminum mirror. The resulting reflectance was corrected for the finite reflectance of aluminum.
  • 22
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    • This function is related to optical conductivity as (ω) = (ω) +i 2 (ω) = (ω) + 4πi ω σ1 (ω).
    • This function is related to optical conductivity as (ω) = 1 (ω) + i 2 (ω) = 1 (ω) + 4 π i ω σ 1 (ω).
  • 23
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    • See supplementary material at http://link.aps.org/supplemental/10.1103/ PhysRevB.82.014304 for several example fits as shown in the electronic auxiliary material.
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  • 27
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    • We use the commensurate approximation as in Ref..
    • We use the commensurate approximation as in Ref..
  • 28
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    • Optimization of corresponding refinement of atom positions is still ongoing and complete results will be given elsewhere.
    • Optimization of corresponding refinement of atom positions is still ongoing and complete results will be given elsewhere.
  • 30
    • 77956502739 scopus 로고    scopus 로고
    • The unique direction is along x in the low-temperature phase rather than along z as in the high temperature. Here, x axis is the line intersecting the basal plane and the mirror plane, and z is the (001 ) h direction.
    • The unique direction is along x in the low-temperature phase rather than along z as in the high temperature. Here, x axis is the line intersecting the basal plane and the mirror plane, and z is the (001) h direction.
  • 33
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    • As shown in the inset of Fig. , the absorption spectra of powder sample show enhanced intensity of group 1 and 3 compared with group 2 and 4, indicating that the polarization of group 1 and 3 are more out of plane, consistent with the assignment of zone-folding modes, which come from the low symmetry of the charge order.
    • As shown in the inset of Fig., the absorption spectra of powder sample show enhanced intensity of group 1 and 3 compared with group 2 and 4, indicating that the polarization of group 1 and 3 are more out of plane, consistent with the assignment of zone-folding modes, which come from the low symmetry of the charge order.
  • 35
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    • In this case, group theory predicts only one component to the intralayer LuO2 mode, a result that is clearly incompatible with our experimental observation.
    • In this case, group theory predicts only one component to the intralayer LuO 2 mode, a result that is clearly incompatible with our experimental observation.
  • 36
    • 77956519322 scopus 로고    scopus 로고
    • All the following discussion will be in the context of antipolar CO.
    • All the following discussion will be in the context of antipolar CO.
  • 37
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    • The peak area is calculated by fitting the peak in a certain range with a straight baseline. In this way, the background contribution can be excluded, only the sharpness of the peak is retained.
    • The peak area is calculated by fitting the peak in a certain range with a straight baseline. In this way, the background contribution can be excluded, only the sharpness of the peak is retained.
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    • Scott, J.F.1
  • 40
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    • note
    • Our crystals were grown in CO / CO 2 flow rather than Ar, a procedure that gives us excellent control over oxygen stoichiometry. Considering the different synthetic procedures, it is very likely that our samples and Vitucci 's are not equivalent. Moreover, our crystals display typical quality indicators such as magnetic ordering at T N = 240 K (rather than 230 K) and a clear T L T transition that can be deduced even in the infrared spectra. The low-frequency reflectance is also relatively flat, another indication of nonleaky samples.
  • 43
    • 77956545087 scopus 로고    scopus 로고
    • in edited by V. Gopalan, J.-P. Maria, M. Fiebig, and C.-W. Nan, MRS Symposia Proceedings No. 966E (Materials Research Society, Warrendale
    • Y. Matsuo, S. Shinohara, S. Mori, Y. Horibe, K. Yoshii, and N. Ikeda, in Ferroelectrics and Multiferroics, edited by, V. Gopalan, J.-P. Maria, M. Fiebig, and, C.-W. Nan, MRS Symposia Proceedings No. 966E (Materials Research Society, Warrendale, 2007).
    • (2007) Ferroelectrics and Multiferroics
    • Matsuo, Y.1    Shinohara, S.2    Mori, S.3    Horibe, Y.4    Yoshii, K.5    Ikeda, N.6


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.