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共振X射线衍射研究高温超导Sr2CuO3.4晶体中的调制结构

王海波 罗震林 刘清青 靳常青 高琛 张丽

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共振X射线衍射研究高温超导Sr2CuO3.4晶体中的调制结构

王海波, 罗震林, 刘清青, 靳常青, 高琛, 张丽

Resonant X-ray diffraction studies on modulation structures of high temperature superconducting sample Sr2CuO3.4

Wang Hai-Bo, Luo Zhen-Lin, Liu Qing-Qing, Jin Chang-Qing, Gao Chen, Zhang Li
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  • 为了进一步研究Sr2CuO3.4高温超导样品中调制结构与超导电性关系, 本文对其调制结构形成机制提出了一种新的解释. 采用同步辐射共振X射线衍射技术在Cu K边附近探测调制结构随入射光能量的变化, 探测到Cu2+, Cu3+变价有序, 并用于解释Sr2CuO3.4高温超导样品中调制结构的形成机制. 实验结果表明, 氧空位既占据顶角位置又存在于CuO2面内, 氧空位的有序排布造成变价铜离子有序, 这种有序结构与其超导电性相关.
    Sr2CuO3+δ is cuprate, a high temperature superconducting (HTS) material that has a single copper oxide layer and a relatively high critical temperature. Its structure is simple and contains fewer atoms, but there are many modulation structures in it. A lot of studies have pointed out that the modulation structure is related to its superconductivity. In order to further study the relationship between modulated structure and superconductivity in Sr2CuO3.4 HTS sample, a new explanation for the formation mechanism of modulation structure is proposed in this paper. The synchrotron radiation resonant X-ray diffraction (RXD) technique is used to detect the variation of modulation structure near the absorption edge of Cu atom. Cu2+, Cu3+ valence order is detected and used to explain the formation mechanism of modulation structure in Sr2CuO3.4 high temperature superconducting sample. The energy values of incident light are selected to be 8.52, 8.95, 8.98, 9.05, 9.5, and 10.0 keV near the edge of Cu K. The energy resolution is about 1.5 eV. The detector used in the experiment is Mar165 CCD surface detector. The distance from the detector to the sample is about 315 mm. The two-dimensional diffraction pattern recorded by the CCD plane detector is processed by Fit2D software to obtain the diffraction integral intensity. In addition, the energy calibration for each of the copper foil samples is carried out prior to the start of the experiment and in the process of varying energy value.The experimental results show that the Bragg diffraction peaks corresponding to Tc = 48 K and the modulation structures of Fmmm and Pmmm are visible and calibrated. The intensity of the corresponding (2/5, 4/5, 0) diffraction peak of Fmmm is energy-dependent near the Cu K edge and first increases and then decreases abruptly near the absorption edge. This indicates that a stable ordered arrangement structure of Cu2+ and Cu3+ is formed at this time. The weak diffraction signal of this ordered arrangement structure confirms the fact that the copper-O bonding is stronger.The experiments indicate that oxygen vacancies occupy both the apical position and the CuO2 plane. The ordering arrangement of oxygen vacancies results in the ordering of copper ions with variable valence. The Cu2+, Cu3+ valence order is related to the superconductivity of Sr2CuO3.4.
      通信作者: 张丽, wanghaibo014@126.com
    • 基金项目: 国家自然科学基金(批准号: WK2310000043)和吉林省教育厅“十三五”科学技术课题(批准号: JJKH20180860KJ)资助的课题.
      Corresponding author: Zhang Li, wanghaibo014@126.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. WK2310000043) and the Science and Technology Program of the 13rd Five-Year Plan of Education Bureau of Jilin Province, China (Grant No. JJKH 20180860KJ).
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    Shimakawa Y, Jorgensen J D, Mitchell J F, Hunter B A, Shaked H, Hinks D G, Hitterman R L, Hiroi Z, Takano M 1994 Physica C 228 73Google Scholar

    [4]

    Zhang H, Wang Y Y, Marks L D, Dravid V P, Han P D, Payne D A 1995 Physica C 255 257Google Scholar

    [5]

    Yang H, Liu Q Q, Li F Y, Jin C Q, Yu R C 2007 Supercond. Sci. Technol. 20 904Google Scholar

    [6]

    Liu Q, Yang H, Qin X, Yang L X, Li F Y, Yu Y, Yu R C, Jin C Q, Uchida S 2007 Physica C 460−462 56

    [7]

    Liu Q Q, Yang H, Qin X M, Yu Y, Yang L X, Li F Y, Yu R C, Jin C Q, Uchida S 2006 Phys. Rev. B 74 100506Google Scholar

    [8]

    Liu Y, Shen X, Liu Q Q, Li X, Feng S M, Yu R C, Uchida S, Jin C Q 2014 Physica C 497 34Google Scholar

    [9]

    Nazarenko E, Lorenzo J E, Joly Y, Hodeau J L, Mannix D, Marin C 2006 Phys. Rev. Lett. 97 056403Google Scholar

    [10]

    Ohgushi K, Yamaura J I, Ohsumi H, Sugimoto K, Takeshita S, Tokuda A, Takagi H, Takata M, Arima T H 2013 Phys. Rev. Lett. 110 217212Google Scholar

    [11]

    Dmitrienko V E, Ovchinnikova E N 2000 Acta Crystallogr. 56 340Google Scholar

    [12]

    Tanaka A, Chang C F, Buchholz M F, Trabant C, Schierle E, Schlappa J, Schmitz D, Ott H, Metcalf P, Tjeng L H, Schüßler-Langeheine C 2012 Phys. Rev. Lett. 108 227203Google Scholar

    [13]

    Ovchinnikova E N, Dmitrienko V E 1999 Acta Crystallogr. 55 20Google Scholar

    [14]

    王海波 2014 博士学位论文 (合肥: 中国科学技术大学)

    Wang H B 2014 Ph. D. Dissertation (Heifei: University of Science and Technology of China) (in Chinese)

    [15]

    Hodeau J L, Favre-Nicolin V, Bos S, Renevier H, Lorenzo E, Berar J F 2001 Chem. Rev. 101 1843Google Scholar

    [16]

    Finkelstein K D, Shen Q, Shastri S 1992 Phys. Rev. Lett. 69 1612Google Scholar

    [17]

    Nakamura K, Arima T, Nakazawa A, Wakabayashi Y, Murakami Y 1999 Phys. Rev. B 60 2425

    [18]

    Goff R J, Wright J P, Attfield J P, Radaelli Paolo G 2005 J. Phys.: Condens. Matter 17 7633Google Scholar

    [19]

    Ewings R A, Boothroyd A T, Mcmorrow D F, Mannix D, Walker H C, Wanklyn B M R 2008 Phys. Rev. B 77 104415Google Scholar

    [20]

    Wang H B, Liang W, Liu Q Q, Huang H L, Yang M M, Luo Z L, Yang Y J, Hu S X, Jin C Q, Gao C 2014 J. Electron Spectrosc. Relat. Phenom. 196 61Google Scholar

  • 图 1  Sr2CuO3+δ的晶体结构

    Fig. 1.  Crystal structure of Sr2CuO3+δ.

    图 2  RXD实验测量几何示意图

    Fig. 2.  Geometric schematic diagram of RXD experimental measurement.

    图 3  Sr2CuO3+δ超导粉末样品(Tc = 48 K)在不同入射光子能量下采集的二维衍射图

    Fig. 3.  Two-dimensional diffraction patterns of Sr2CuO3+δ superconducting powder samples (Tc = 48 K) at different incident photon energies.

    图 4  入射光子能量为8.95 keV时Sr2CuO3+δ (Tc = 48 K)超导粉末样品的衍射曲线以及衍射峰标定

    Fig. 4.  Diffraction curve and calibration of diffraction peak of Sr2CuO3+δ superconducting powder samples with incident photon energy of 8.95 keV.

    图 5  Cu2+和Cu3+的原子散射因子的实部和虚部

    Fig. 5.  Real and imaginary parts of atomic scattering factors of Cu2+ and Cu3+ ions.

    图 6  (2/5, 4/5, 0)衍射峰强度的能量依赖性

    Fig. 6.  Energy dependence of (2/5, 4/5, 0) diffraction peak intensity.

  • [1]

    Hiroi Z, Takano M, Azuma M, Takeda Y 1993 Nature 364 315Google Scholar

    [2]

    Adachi S, Tatsuki T, Sugano T, Ayako Y, Tanabe K 2000 Physica C 334 87Google Scholar

    [3]

    Shimakawa Y, Jorgensen J D, Mitchell J F, Hunter B A, Shaked H, Hinks D G, Hitterman R L, Hiroi Z, Takano M 1994 Physica C 228 73Google Scholar

    [4]

    Zhang H, Wang Y Y, Marks L D, Dravid V P, Han P D, Payne D A 1995 Physica C 255 257Google Scholar

    [5]

    Yang H, Liu Q Q, Li F Y, Jin C Q, Yu R C 2007 Supercond. Sci. Technol. 20 904Google Scholar

    [6]

    Liu Q, Yang H, Qin X, Yang L X, Li F Y, Yu Y, Yu R C, Jin C Q, Uchida S 2007 Physica C 460−462 56

    [7]

    Liu Q Q, Yang H, Qin X M, Yu Y, Yang L X, Li F Y, Yu R C, Jin C Q, Uchida S 2006 Phys. Rev. B 74 100506Google Scholar

    [8]

    Liu Y, Shen X, Liu Q Q, Li X, Feng S M, Yu R C, Uchida S, Jin C Q 2014 Physica C 497 34Google Scholar

    [9]

    Nazarenko E, Lorenzo J E, Joly Y, Hodeau J L, Mannix D, Marin C 2006 Phys. Rev. Lett. 97 056403Google Scholar

    [10]

    Ohgushi K, Yamaura J I, Ohsumi H, Sugimoto K, Takeshita S, Tokuda A, Takagi H, Takata M, Arima T H 2013 Phys. Rev. Lett. 110 217212Google Scholar

    [11]

    Dmitrienko V E, Ovchinnikova E N 2000 Acta Crystallogr. 56 340Google Scholar

    [12]

    Tanaka A, Chang C F, Buchholz M F, Trabant C, Schierle E, Schlappa J, Schmitz D, Ott H, Metcalf P, Tjeng L H, Schüßler-Langeheine C 2012 Phys. Rev. Lett. 108 227203Google Scholar

    [13]

    Ovchinnikova E N, Dmitrienko V E 1999 Acta Crystallogr. 55 20Google Scholar

    [14]

    王海波 2014 博士学位论文 (合肥: 中国科学技术大学)

    Wang H B 2014 Ph. D. Dissertation (Heifei: University of Science and Technology of China) (in Chinese)

    [15]

    Hodeau J L, Favre-Nicolin V, Bos S, Renevier H, Lorenzo E, Berar J F 2001 Chem. Rev. 101 1843Google Scholar

    [16]

    Finkelstein K D, Shen Q, Shastri S 1992 Phys. Rev. Lett. 69 1612Google Scholar

    [17]

    Nakamura K, Arima T, Nakazawa A, Wakabayashi Y, Murakami Y 1999 Phys. Rev. B 60 2425

    [18]

    Goff R J, Wright J P, Attfield J P, Radaelli Paolo G 2005 J. Phys.: Condens. Matter 17 7633Google Scholar

    [19]

    Ewings R A, Boothroyd A T, Mcmorrow D F, Mannix D, Walker H C, Wanklyn B M R 2008 Phys. Rev. B 77 104415Google Scholar

    [20]

    Wang H B, Liang W, Liu Q Q, Huang H L, Yang M M, Luo Z L, Yang Y J, Hu S X, Jin C Q, Gao C 2014 J. Electron Spectrosc. Relat. Phenom. 196 61Google Scholar

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出版历程
  • 收稿日期:  2019-04-03
  • 修回日期:  2019-07-04
  • 上网日期:  2019-09-01
  • 刊出日期:  2019-09-20

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