Pressure-induced superconductivity from doping-induced antiferromagnetic phase of 112-type Ca1-xLaxFeAs2

Shunsaku Kitagawa, Taishi Sekiya, Yo Fujiyoshi, Shingo Araki, Tatsuo Kobayashi, Naoki Nishimoto, Tasuku Mizukami, Satoshi Ioka, Kazunori Fujimura, Kazutaka Kudo, Minoru Nohara

Research output: Contribution to journalArticle

Abstract

The effects of pressure on antiferromagnetic (AFM) and superconducting phase transitions of 112-type Ca1-xLaxFeAs2 were studied, and the in-plane electrical resistivity ρab was measured with an indenter-type pressure cell. The AFM phase transition temperatures of TN = 47, 63, and 63 K at ambient pressure for x = 0.18, 0.21, and 0.26 was suppressed by applying pressure P, with superconductivity emerging at critical pressures of Pc ≈ 0, 1.5, and 3.4 GPa, respectively. Correspondingly, the slope of TN against P decreased as dTN/P ≈ -15 and -2 K/GPa for x = 0.21 and 0.26, respectively. Thus, although the AFM phase was stabilized with La doping x, the AFM phase was suppressed by pressure, and superconductivity eventually emerged.

Original languageEnglish
Article number113705
JournalJournal of the Physical Society of Japan
Volume86
Issue number11
DOIs
Publication statusPublished - Nov 15 2017

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superconductivity
critical pressure
emerging
transition temperature
slopes
electrical resistivity
cells

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  • Physics and Astronomy(all)

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Pressure-induced superconductivity from doping-induced antiferromagnetic phase of 112-type Ca1-xLaxFeAs2 . / Kitagawa, Shunsaku; Sekiya, Taishi; Fujiyoshi, Yo; Araki, Shingo; Kobayashi, Tatsuo; Nishimoto, Naoki; Mizukami, Tasuku; Ioka, Satoshi; Fujimura, Kazunori; Kudo, Kazutaka; Nohara, Minoru.

In: Journal of the Physical Society of Japan, Vol. 86, No. 11, 113705, 15.11.2017.

Research output: Contribution to journalArticle

Kitagawa, Shunsaku ; Sekiya, Taishi ; Fujiyoshi, Yo ; Araki, Shingo ; Kobayashi, Tatsuo ; Nishimoto, Naoki ; Mizukami, Tasuku ; Ioka, Satoshi ; Fujimura, Kazunori ; Kudo, Kazutaka ; Nohara, Minoru. / Pressure-induced superconductivity from doping-induced antiferromagnetic phase of 112-type Ca1-xLaxFeAs2 In: Journal of the Physical Society of Japan. 2017 ; Vol. 86, No. 11.
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AU - Araki, Shingo

AU - Kobayashi, Tatsuo

AU - Nishimoto, Naoki

AU - Mizukami, Tasuku

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AU - Kudo, Kazutaka

AU - Nohara, Minoru

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