Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy

Z. Wang; Y. J. Song; H. L. Shi; Z. W. Wang; Z. Chen; H. F. Tian; G. F. Chen; J. G. Guo; H. X. Yang; J. Q. Li

doi:10.1103/PhysRevB.83.140505

Microstructure and ordering of iron vacancies in the superconductor system K_yFe_xSe₂ as seen via transmission electron microscopy

Z. Wang, Y. J. Song, H. L. Shi, Z. W. Wang, Z. Chen, H. F. Tian, G. F. Chen, J. G. Guo, H. X. Yang, J. Q. Li^*

^*此作品的通讯作者

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246 引用（Scopus）

摘要

Structural investigations by means of transmission electron microscopy (TEM) on K_0.8Fe_xSe₂ and KFe_xSe ₂, with 1.5 ≤ x ≤ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ≤ x ≤ 1.6 often show a superstructure modulation along the [310] zone-axis direction, and this modulation can be well interpreted by the Fe-vacancy order, which likely yields a superstructure phase of K₂Fe₄Se₅. The superconducting K_0.8Fe_xSe₂ and KFe _xSe₂ (1.7 ≤ x ≤ 1.8) materials contain clear phase separation, in particular, along the c-axis direction, recognizable as visible parallel lamellae in the crystals; this fact suggests that the superconducting phase could have the Fe-vacancy disordered state.

源语言	英语
文章编号	140505
期刊	Physical Review B - Condensed Matter and Materials Physics
卷	83
期	14
DOI	https://doi.org/10.1103/PhysRevB.83.140505
出版状态	已出版 - 13 4月 2011
已对外发布	是

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Wang, Z., Song, Y. J., Shi, H. L., Wang, Z. W., Chen, Z., Tian, H. F., Chen, G. F., Guo, J. G., Yang, H. X., & Li, J. Q. (2011). Microstructure and ordering of iron vacancies in the superconductor system K_yFe_xSe₂ as seen via transmission electron microscopy. Physical Review B - Condensed Matter and Materials Physics, 83(14), 文章 140505. https://doi.org/10.1103/PhysRevB.83.140505

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title = "Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy",

abstract = "Structural investigations by means of transmission electron microscopy (TEM) on K0.8FexSe2 and KFexSe 2, with 1.5 ≤ x ≤ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ≤ x ≤ 1.6 often show a superstructure modulation along the [310] zone-axis direction, and this modulation can be well interpreted by the Fe-vacancy order, which likely yields a superstructure phase of K2Fe4Se5. The superconducting K0.8FexSe2 and KFe xSe2 (1.7 ≤ x ≤ 1.8) materials contain clear phase separation, in particular, along the c-axis direction, recognizable as visible parallel lamellae in the crystals; this fact suggests that the superconducting phase could have the Fe-vacancy disordered state.",

author = "Z. Wang and Song, {Y. J.} and Shi, {H. L.} and Wang, {Z. W.} and Z. Chen and Tian, {H. F.} and Chen, {G. F.} and Guo, {J. G.} and Yang, {H. X.} and Li, {J. Q.}",

year = "2011",

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doi = "10.1103/PhysRevB.83.140505",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy

AU - Wang, Z.

AU - Song, Y. J.

AU - Shi, H. L.

AU - Wang, Z. W.

AU - Chen, Z.

AU - Tian, H. F.

AU - Chen, G. F.

AU - Guo, J. G.

AU - Yang, H. X.

AU - Li, J. Q.

PY - 2011/4/13

Y1 - 2011/4/13

N2 - Structural investigations by means of transmission electron microscopy (TEM) on K0.8FexSe2 and KFexSe 2, with 1.5 ≤ x ≤ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ≤ x ≤ 1.6 often show a superstructure modulation along the [310] zone-axis direction, and this modulation can be well interpreted by the Fe-vacancy order, which likely yields a superstructure phase of K2Fe4Se5. The superconducting K0.8FexSe2 and KFe xSe2 (1.7 ≤ x ≤ 1.8) materials contain clear phase separation, in particular, along the c-axis direction, recognizable as visible parallel lamellae in the crystals; this fact suggests that the superconducting phase could have the Fe-vacancy disordered state.

AB - Structural investigations by means of transmission electron microscopy (TEM) on K0.8FexSe2 and KFexSe 2, with 1.5 ≤ x ≤ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ≤ x ≤ 1.6 often show a superstructure modulation along the [310] zone-axis direction, and this modulation can be well interpreted by the Fe-vacancy order, which likely yields a superstructure phase of K2Fe4Se5. The superconducting K0.8FexSe2 and KFe xSe2 (1.7 ≤ x ≤ 1.8) materials contain clear phase separation, in particular, along the c-axis direction, recognizable as visible parallel lamellae in the crystals; this fact suggests that the superconducting phase could have the Fe-vacancy disordered state.

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VL - 83

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy

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Microstructure and ordering of iron vacancies in the superconductor system K_yFe_xSe₂ as seen via transmission electron microscopy