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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

247 Citations (Scopus)

Abstract

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.

Original language	English
Article number	140505
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.83.140505
Publication status	Published - 13 Apr 2011
Externally published	Yes

Access to Document

10.1103/PhysRevB.83.140505

Cite this

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), Article 140505. https://doi.org/10.1103/PhysRevB.83.140505

@article{748859fcb4b04daf9b658860d8debedc,

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",

month = apr,

day = "13",

doi = "10.1103/PhysRevB.83.140505",

language = "English",

volume = "83",

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

issn = "1098-0121",

publisher = "American Physical Society",

number = "14",

}

TY - JOUR

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.

UR - http://www.scopus.com/inward/record.url?scp=79961068164&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.83.140505

DO - 10.1103/PhysRevB.83.140505

M3 - Article

AN - SCOPUS:79961068164

SN - 1098-0121

VL - 83

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 14

M1 - 140505

ER -

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this