Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor

Meng Wang; Miaoyin Wang; Hu Miao; S. V. Carr; D. L. Abernathy; M. B. Stone; X. C. Wang; Lingyi Xing; C. Q. Jin; Xiaotian Zhang; Jiangping Hu; Tao Xiang; Hong Ding; Pengcheng Dai

doi:10.1103/PhysRevB.86.144511

Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor

Meng Wang, Miaoyin Wang, Hu Miao, S. V. Carr, D. L. Abernathy, M. B. Stone, X. C. Wang, Lingyi Xing, C. Q. Jin, Xiaotian Zhang, Jiangping Hu, Tao Xiang, Hong Ding, Pengcheng Dai

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Abstract

We use transport, inelastic neutron scattering, and angle-resolved photoemission experiments to demonstrate that the stoichiometric LiFeAs is an intrinsically electron-overdoped superconductor similar to those of the electron-overdoped NaFe _1-xT _xAs and BaFe _2-xT _xAs ₂ (T=Co, Ni). Furthermore, we show that although transport properties of the stoichiometric superconducting LiFeAs and Li-deficient nonsuperconducting Li _1-xFeAs are different, their electronic and magnetic properties are rather similar. Therefore, the nonsuperconducting Li _1-xFeAs is also in the electron overdoped regime, where small Li deficiencies near the FeAs octahedra can dramatically suppress superconductivity through the impurity scattering effect.

Original language	English
Article number	144511
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.86.144511
State	Published - Oct 11 2012

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Wang, M., Wang, M., Miao, H., Carr, S. V., Abernathy, D. L., Stone, M. B., Wang, X. C., Xing, L., Jin, C. Q., Zhang, X., Hu, J., Xiang, T., Ding, H., & Dai, P. (2012). Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor. Physical Review B - Condensed Matter and Materials Physics, 86(14), Article 144511. https://doi.org/10.1103/PhysRevB.86.144511

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title = "Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor",

abstract = "We use transport, inelastic neutron scattering, and angle-resolved photoemission experiments to demonstrate that the stoichiometric LiFeAs is an intrinsically electron-overdoped superconductor similar to those of the electron-overdoped NaFe 1-xT xAs and BaFe 2-xT xAs 2 (T=Co, Ni). Furthermore, we show that although transport properties of the stoichiometric superconducting LiFeAs and Li-deficient nonsuperconducting Li 1-xFeAs are different, their electronic and magnetic properties are rather similar. Therefore, the nonsuperconducting Li 1-xFeAs is also in the electron overdoped regime, where small Li deficiencies near the FeAs octahedra can dramatically suppress superconductivity through the impurity scattering effect.",

author = "Meng Wang and Miaoyin Wang and Hu Miao and Carr, {S. V.} and Abernathy, {D. L.} and Stone, {M. B.} and Wang, {X. C.} and Lingyi Xing and Jin, {C. Q.} and Xiaotian Zhang and Jiangping Hu and Tao Xiang and Hong Ding and Pengcheng Dai",

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doi = "10.1103/PhysRevB.86.144511",

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AU - Wang, Meng

AU - Wang, Miaoyin

AU - Miao, Hu

AU - Carr, S. V.

AU - Abernathy, D. L.

AU - Stone, M. B.

AU - Wang, X. C.

AU - Xing, Lingyi

AU - Jin, C. Q.

AU - Zhang, Xiaotian

AU - Hu, Jiangping

AU - Xiang, Tao

AU - Ding, Hong

AU - Dai, Pengcheng

PY - 2012/10/11

Y1 - 2012/10/11

N2 - We use transport, inelastic neutron scattering, and angle-resolved photoemission experiments to demonstrate that the stoichiometric LiFeAs is an intrinsically electron-overdoped superconductor similar to those of the electron-overdoped NaFe 1-xT xAs and BaFe 2-xT xAs 2 (T=Co, Ni). Furthermore, we show that although transport properties of the stoichiometric superconducting LiFeAs and Li-deficient nonsuperconducting Li 1-xFeAs are different, their electronic and magnetic properties are rather similar. Therefore, the nonsuperconducting Li 1-xFeAs is also in the electron overdoped regime, where small Li deficiencies near the FeAs octahedra can dramatically suppress superconductivity through the impurity scattering effect.

AB - We use transport, inelastic neutron scattering, and angle-resolved photoemission experiments to demonstrate that the stoichiometric LiFeAs is an intrinsically electron-overdoped superconductor similar to those of the electron-overdoped NaFe 1-xT xAs and BaFe 2-xT xAs 2 (T=Co, Ni). Furthermore, we show that although transport properties of the stoichiometric superconducting LiFeAs and Li-deficient nonsuperconducting Li 1-xFeAs are different, their electronic and magnetic properties are rather similar. Therefore, the nonsuperconducting Li 1-xFeAs is also in the electron overdoped regime, where small Li deficiencies near the FeAs octahedra can dramatically suppress superconductivity through the impurity scattering effect.

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DO - 10.1103/PhysRevB.86.144511

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor

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