Superconductivity in ternary iron pnictides: AFe2As2 (A = alkali metal) and LiFeAs

M. Gooch; B. Lv; K. Sasmal; J. H. Tapp; Z. J. Tang; A. M. Guloy; B. Lorenz; C. W. Chu

doi:10.1016/j.physc.2009.10.096

Superconductivity in ternary iron pnictides: AFe₂As₂ (A = alkali metal) and LiFeAs

M. Gooch, B. Lv, K. Sasmal, J. H. Tapp, Z. J. Tang, A. M. Guloy, B. Lorenz, C. W. Chu

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Abstract

Superconductivity is observed in AFe₂As₂ (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe₂As ₂ displays superconductivity with a high Tc=25K. These compounds are considered to be strongly hole-overdoped. The stoichiometric LiFeAs is superconducting below 18 K. The origin of superconductivity in LiFeAs is critically investigated and we show that Li deficiency cannot explain the experimental results. We propose that superconducting LiFeAs is stoichiometric and it is equivalent to the high-pressure state of other undoped iron pnictides.

Original language	English
Pages (from-to)	S276-S279
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.096
Publication status	Published - 2010 Dec

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2009.10.096

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title = "Superconductivity in ternary iron pnictides: AFe2As2 (A = alkali metal) and LiFeAs",

abstract = "Superconductivity is observed in AFe2As2 (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe2As 2 displays superconductivity with a high Tc=25K. These compounds are considered to be strongly hole-overdoped. The stoichiometric LiFeAs is superconducting below 18 K. The origin of superconductivity in LiFeAs is critically investigated and we show that Li deficiency cannot explain the experimental results. We propose that superconducting LiFeAs is stoichiometric and it is equivalent to the high-pressure state of other undoped iron pnictides.",

author = "M. Gooch and B. Lv and K. Sasmal and Tapp, {J. H.} and Tang, {Z. J.} and Guloy, {A. M.} and B. Lorenz and Chu, {C. W.}",

note = "Funding Information: The authors wish to acknowledge support from the T.L.L. Temple Foundation , the J.J. and R. Moores Endowment , the State of Texas through TCSUH , the US Air Force Office of Scientific Research , the NSF ( CHE-0616805 ) and the R.A. Welch Foundation . ",

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doi = "10.1016/j.physc.2009.10.096",

language = "English",

volume = "470",

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journal = "Physica C: Superconductivity and its applications",

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T1 - Superconductivity in ternary iron pnictides

T2 - AFe2As2 (A = alkali metal) and LiFeAs

AU - Gooch, M.

AU - Lv, B.

AU - Sasmal, K.

AU - Tapp, J. H.

AU - Tang, Z. J.

AU - Guloy, A. M.

AU - Lorenz, B.

AU - Chu, C. W.

N1 - Funding Information: The authors wish to acknowledge support from the T.L.L. Temple Foundation , the J.J. and R. Moores Endowment , the State of Texas through TCSUH , the US Air Force Office of Scientific Research , the NSF ( CHE-0616805 ) and the R.A. Welch Foundation .

PY - 2010/12

Y1 - 2010/12

N2 - Superconductivity is observed in AFe2As2 (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe2As 2 displays superconductivity with a high Tc=25K. These compounds are considered to be strongly hole-overdoped. The stoichiometric LiFeAs is superconducting below 18 K. The origin of superconductivity in LiFeAs is critically investigated and we show that Li deficiency cannot explain the experimental results. We propose that superconducting LiFeAs is stoichiometric and it is equivalent to the high-pressure state of other undoped iron pnictides.

AB - Superconductivity is observed in AFe2As2 (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe2As 2 displays superconductivity with a high Tc=25K. These compounds are considered to be strongly hole-overdoped. The stoichiometric LiFeAs is superconducting below 18 K. The origin of superconductivity in LiFeAs is critically investigated and we show that Li deficiency cannot explain the experimental results. We propose that superconducting LiFeAs is stoichiometric and it is equivalent to the high-pressure state of other undoped iron pnictides.

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IS - SUPPL.1

ER -

Superconductivity in ternary iron pnictides: AFe₂As₂ (A = alkali metal) and LiFeAs

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