Structural phase separation in K 0.8Fe 1.6+xSe 2 superconductors

Zhi Wei Wang; Zhen Wang; Yuan Jun Song; Chao Ma; Yao Cai; Zhen Chen; Huan Fang Tian; Huai Xin Yang; Gen Fu Chen; Jian Qi Li

doi:10.1021/jp306310m

Structural phase separation in K _0.8Fe _1.6+xSe ₂ superconductors

Zhi Wei Wang, Zhen Wang, Yuan Jun Song, Chao Ma, Yao Cai, Zhen Chen, Huan Fang Tian, Huai Xin Yang, Gen Fu Chen, Jian Qi Li^*

^*此作品的通讯作者

CAS - Institute of Physics

科研成果: 期刊稿件 › 文章 › 同行评审

62 引用（Scopus）

摘要

Structural investigations on the K _0.8Fe _1.6+xSe ₂ superconducting materials have revealed microstripes arising from phase separation. Two coexisting structural phases can be characterized by modulations of q ₁ = 1/5[3a ^* + b ^*], the antiferromagnetic phase K _0.8Fe _1.6+xSe ₂, and q ₂ = 1/2[a ^* + b ^*], the superconducting phase K _yFe ₂Se ₂, respectively. These stripe patterns also show visible correlation with the anisotropic assembly of superconducting particles along the [110] and [11̄0] directions. In addition to the notable stripe structures, a nanoscale phase separation also appears in the present superconducting system as clearly observed by high-resolution transmission electron microscopy. Certain nanoscale structural features in this heterogeneous system can be qualitatively understood by the percolation scenario.

源语言	英语
页（从-至）	17847-17852
页数	6
期刊	Journal of Physical Chemistry C
卷	116
期	33
DOI	https://doi.org/10.1021/jp306310m
出版状态	已出版 - 23 8月 2012
已对外发布	是

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10.1021/jp306310m

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Wang, Z. W., Wang, Z., Song, Y. J., Ma, C., Cai, Y., Chen, Z., Tian, H. F., Yang, H. X., Chen, G. F., & Li, J. Q. (2012). Structural phase separation in K _0.8Fe _1.6+xSe ₂ superconductors. Journal of Physical Chemistry C, 116(33), 17847-17852. https://doi.org/10.1021/jp306310m

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title = "Structural phase separation in K 0.8Fe 1.6+xSe 2 superconductors",

abstract = "Structural investigations on the K 0.8Fe 1.6+xSe 2 superconducting materials have revealed microstripes arising from phase separation. Two coexisting structural phases can be characterized by modulations of q 1 = 1/5[3a * + b *], the antiferromagnetic phase K 0.8Fe 1.6+xSe 2, and q 2 = 1/2[a * + b *], the superconducting phase K yFe 2Se 2, respectively. These stripe patterns also show visible correlation with the anisotropic assembly of superconducting particles along the [110] and [1{\=1}0] directions. In addition to the notable stripe structures, a nanoscale phase separation also appears in the present superconducting system as clearly observed by high-resolution transmission electron microscopy. Certain nanoscale structural features in this heterogeneous system can be qualitatively understood by the percolation scenario.",

author = "Wang, {Zhi Wei} and Zhen Wang and Song, {Yuan Jun} and Chao Ma and Yao Cai and Zhen Chen and Tian, {Huan Fang} and Yang, {Huai Xin} and Chen, {Gen Fu} and Li, {Jian Qi}",

year = "2012",

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doi = "10.1021/jp306310m",

language = "English",

volume = "116",

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journal = "Journal of Physical Chemistry C",

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T1 - Structural phase separation in K 0.8Fe 1.6+xSe 2 superconductors

AU - Wang, Zhi Wei

AU - Wang, Zhen

AU - Song, Yuan Jun

AU - Ma, Chao

AU - Cai, Yao

AU - Chen, Zhen

AU - Tian, Huan Fang

AU - Yang, Huai Xin

AU - Chen, Gen Fu

AU - Li, Jian Qi

PY - 2012/8/23

Y1 - 2012/8/23

N2 - Structural investigations on the K 0.8Fe 1.6+xSe 2 superconducting materials have revealed microstripes arising from phase separation. Two coexisting structural phases can be characterized by modulations of q 1 = 1/5[3a * + b *], the antiferromagnetic phase K 0.8Fe 1.6+xSe 2, and q 2 = 1/2[a * + b *], the superconducting phase K yFe 2Se 2, respectively. These stripe patterns also show visible correlation with the anisotropic assembly of superconducting particles along the [110] and [11̄0] directions. In addition to the notable stripe structures, a nanoscale phase separation also appears in the present superconducting system as clearly observed by high-resolution transmission electron microscopy. Certain nanoscale structural features in this heterogeneous system can be qualitatively understood by the percolation scenario.

AB - Structural investigations on the K 0.8Fe 1.6+xSe 2 superconducting materials have revealed microstripes arising from phase separation. Two coexisting structural phases can be characterized by modulations of q 1 = 1/5[3a * + b *], the antiferromagnetic phase K 0.8Fe 1.6+xSe 2, and q 2 = 1/2[a * + b *], the superconducting phase K yFe 2Se 2, respectively. These stripe patterns also show visible correlation with the anisotropic assembly of superconducting particles along the [110] and [11̄0] directions. In addition to the notable stripe structures, a nanoscale phase separation also appears in the present superconducting system as clearly observed by high-resolution transmission electron microscopy. Certain nanoscale structural features in this heterogeneous system can be qualitatively understood by the percolation scenario.

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SN - 1932-7447

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EP - 17852

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

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ER -

Structural phase separation in K 0.8Fe 1.6+xSe 2 superconductors

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Structural phase separation in K _0.8Fe _1.6+xSe ₂ superconductors