Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2

Shichao Li; Yuan Gan; Jinghui Wang; Ruidan Zhong; J. A. Schneeloch; Zhijun Xu; Wei Tian; M. B. Stone; Songxue Chi; M. Matsuda; Y. Sidis; Ph Bourges; Qiang Li; Genda Gu; J. M. Tranquada; Guangyong Xu; R. J. Birgeneau; Jinsheng Wen

doi:10.1103/PhysRevB.96.094503

Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2

Shichao Li, Yuan Gan, Jinghui Wang, Ruidan Zhong, J. A. Schneeloch, Zhijun Xu, Wei Tian, M. B. Stone, Songxue Chi, M. Matsuda, Y. Sidis, Ph Bourges, Qiang Li, Genda Gu, J. M. Tranquada, Guangyong Xu, R. J. Birgeneau, Jinsheng Wen

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Abstract

We have combined elastic and inelastic neutron scattering techniques, magnetic susceptibility, and resistivity measurements to study single-crystal samples of KxFe2-ySe2, which contain the superconducting phase that has a transition temperature of ∼31 K. In the inelastic neutron scattering measurements, we observe both the spin-wave excitations resulting from the block antiferromagnetic ordered phase and the resonance that is associated with the superconductivity in the superconducting phase, demonstrating the coexistence of these two orders. From the temperature dependence of the intensity of the magnetic Bragg peaks, we find that well before entering the superconducting state, the development of the magnetic order is interrupted, at ∼42 K. We consider this result to be evidence for the physical separation of the antiferromagnetic and superconducting phases; the suppression is possibly due to the proximity effect of the superconducting fluctuations on the antiferromagnetic order.

Original language	English
Article number	094503
Journal	Physical Review B
Volume	96
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.96.094503
State	Published - Sep 6 2017

Funding

We thank F. Zhang, D. Lee, Q.-H. Wang, H.-H. Wen, and J.-X. Li for stimulating discussions. Work at Nanjing University was supported by NSFC Grants No. 11374143 and No. 11674157. Work at Brookhaven National Laboratory (BNL) was supported by the Office of Basic Energy Sciences, US Department of Energy under Contract No. DE-SC0012704. R.D.Z. and J.A.S. were supported by the Center for Emergent Superconductivity, an Energy Frontier Research Center, headquartered at BNL, funded by US Department of Energy, under Contract No. DE-2009-BNL-PM015. Work at Berkeley was supported by the same Office through Contract No. DE-AC02-05CH11231 within the Quantum Materials Program (KC2202). Research conducted at Oak Ridge National Laboratory's HFIR and SNS was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

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Li, S., Gan, Y., Wang, J., Zhong, R., Schneeloch, J. A., Xu, Z., Tian, W., Stone, M. B., Chi, S., Matsuda, M., Sidis, Y., Bourges, P., Li, Q., Gu, G., Tranquada, J. M., Xu, G., Birgeneau, R. J., & Wen, J. (2017). Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2. Physical Review B, 96(9), Article 094503. https://doi.org/10.1103/PhysRevB.96.094503

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title = "Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2",

abstract = "We have combined elastic and inelastic neutron scattering techniques, magnetic susceptibility, and resistivity measurements to study single-crystal samples of KxFe2-ySe2, which contain the superconducting phase that has a transition temperature of ∼31 K. In the inelastic neutron scattering measurements, we observe both the spin-wave excitations resulting from the block antiferromagnetic ordered phase and the resonance that is associated with the superconductivity in the superconducting phase, demonstrating the coexistence of these two orders. From the temperature dependence of the intensity of the magnetic Bragg peaks, we find that well before entering the superconducting state, the development of the magnetic order is interrupted, at ∼42 K. We consider this result to be evidence for the physical separation of the antiferromagnetic and superconducting phases; the suppression is possibly due to the proximity effect of the superconducting fluctuations on the antiferromagnetic order.",

author = "Shichao Li and Yuan Gan and Jinghui Wang and Ruidan Zhong and Schneeloch, {J. A.} and Zhijun Xu and Wei Tian and Stone, {M. B.} and Songxue Chi and M. Matsuda and Y. Sidis and Ph Bourges and Qiang Li and Genda Gu and Tranquada, {J. M.} and Guangyong Xu and Birgeneau, {R. J.} and Jinsheng Wen",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = sep,

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doi = "10.1103/PhysRevB.96.094503",

language = "English",

volume = "96",

journal = "Physical Review B",

issn = "2469-9950",

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Li, S, Gan, Y, Wang, J, Zhong, R, Schneeloch, JA, Xu, Z, Tian, W , Stone, MB , Chi, S , Matsuda, M, Sidis, Y, Bourges, P, Li, Q, Gu, G, Tranquada, JM, Xu, G, Birgeneau, RJ & Wen, J 2017, 'Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2', Physical Review B, vol. 96, no. 9, 094503. https://doi.org/10.1103/PhysRevB.96.094503

TY - JOUR

T1 - Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2

AU - Li, Shichao

AU - Gan, Yuan

AU - Wang, Jinghui

AU - Zhong, Ruidan

AU - Schneeloch, J. A.

AU - Xu, Zhijun

AU - Tian, Wei

AU - Stone, M. B.

AU - Chi, Songxue

AU - Matsuda, M.

AU - Sidis, Y.

AU - Bourges, Ph

AU - Li, Qiang

AU - Gu, Genda

AU - Tranquada, J. M.

AU - Xu, Guangyong

AU - Birgeneau, R. J.

AU - Wen, Jinsheng

PY - 2017/9/6

Y1 - 2017/9/6

N2 - We have combined elastic and inelastic neutron scattering techniques, magnetic susceptibility, and resistivity measurements to study single-crystal samples of KxFe2-ySe2, which contain the superconducting phase that has a transition temperature of ∼31 K. In the inelastic neutron scattering measurements, we observe both the spin-wave excitations resulting from the block antiferromagnetic ordered phase and the resonance that is associated with the superconductivity in the superconducting phase, demonstrating the coexistence of these two orders. From the temperature dependence of the intensity of the magnetic Bragg peaks, we find that well before entering the superconducting state, the development of the magnetic order is interrupted, at ∼42 K. We consider this result to be evidence for the physical separation of the antiferromagnetic and superconducting phases; the suppression is possibly due to the proximity effect of the superconducting fluctuations on the antiferromagnetic order.

AB - We have combined elastic and inelastic neutron scattering techniques, magnetic susceptibility, and resistivity measurements to study single-crystal samples of KxFe2-ySe2, which contain the superconducting phase that has a transition temperature of ∼31 K. In the inelastic neutron scattering measurements, we observe both the spin-wave excitations resulting from the block antiferromagnetic ordered phase and the resonance that is associated with the superconductivity in the superconducting phase, demonstrating the coexistence of these two orders. From the temperature dependence of the intensity of the magnetic Bragg peaks, we find that well before entering the superconducting state, the development of the magnetic order is interrupted, at ∼42 K. We consider this result to be evidence for the physical separation of the antiferromagnetic and superconducting phases; the suppression is possibly due to the proximity effect of the superconducting fluctuations on the antiferromagnetic order.

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VL - 96

JO - Physical Review B

JF - Physical Review B

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Suppression of the antiferromagnetic order when approaching the superconducting state in a phase-separated crystal of KxFe2-ySe2

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