Evolution of superconductivity in Fe1+yTe1-xSe x annealed in Te vapor

Yue Sun; Yuji Tsuchiya; Tatsuhiro Yamada; Toshihiro Taen; Sunseng Pyon; Zhixiang Shi; Tsuyoshi Tamegai

doi:10.7566/JPSJ.82.093705

Evolution of superconductivity in Fe_1+yTe_1-xSe _x annealed in Te vapor

Yue Sun, Yuji Tsuchiya, Tatsuhiro Yamada, Toshihiro Taen, Sunseng Pyon, Zhixiang Shi, Tsuyoshi Tamegai

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

23 Citations (Scopus)

Abstract

We report a detailed study of the Te vapor annealing effect in Fe _1+yTe_0.6Se_0.4 single crystals. Bulk superconductivity can be gradually induced by annealing with increasing amount of Te, until the molar ratio of Te to the sample reaches 1:10. By further increasing Te molar ratio, superconducting volume is gradually reduced. Resistivity and Hall effect measurements manifest that annealing in Te vapor delocalizes the charge carriers by removing excess Fe. The optimally Te annealed crystal shows homogeneous critical current densities with a large value of ∼4.3 x 10⁵ A/cm², which proves that the Te annealing is effective to induce bulk superconductivity in Fe_1+yTe _1-xSe_x.

Original language	English
Article number	093705
Journal	journal of the physical society of japan
Volume	82
Issue number	9
DOIs	https://doi.org/10.7566/JPSJ.82.093705
Publication status	Published - 2013 Sept
Externally published	Yes

Keywords

Critical current density
Excess Fe
FeTeSe
Hall effect
Iron chalcogenide
Te annealing effect

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.7566/JPSJ.82.093705

Cite this

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title = "Evolution of superconductivity in Fe1+yTe1-xSe x annealed in Te vapor",

abstract = "We report a detailed study of the Te vapor annealing effect in Fe 1+yTe0.6Se0.4 single crystals. Bulk superconductivity can be gradually induced by annealing with increasing amount of Te, until the molar ratio of Te to the sample reaches 1:10. By further increasing Te molar ratio, superconducting volume is gradually reduced. Resistivity and Hall effect measurements manifest that annealing in Te vapor delocalizes the charge carriers by removing excess Fe. The optimally Te annealed crystal shows homogeneous critical current densities with a large value of ∼4.3 x 105 A/cm2, which proves that the Te annealing is effective to induce bulk superconductivity in Fe1+yTe 1-xSex.",

keywords = "Critical current density, Excess Fe, FeTeSe, Hall effect, Iron chalcogenide, Te annealing effect",

author = "Yue Sun and Yuji Tsuchiya and Tatsuhiro Yamada and Toshihiro Taen and Sunseng Pyon and Zhixiang Shi and Tsuyoshi Tamegai",

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TY - JOUR

T1 - Evolution of superconductivity in Fe1+yTe1-xSe x annealed in Te vapor

AU - Sun, Yue

AU - Tsuchiya, Yuji

AU - Yamada, Tatsuhiro

AU - Taen, Toshihiro

AU - Pyon, Sunseng

AU - Shi, Zhixiang

AU - Tamegai, Tsuyoshi

PY - 2013/9

Y1 - 2013/9

N2 - We report a detailed study of the Te vapor annealing effect in Fe 1+yTe0.6Se0.4 single crystals. Bulk superconductivity can be gradually induced by annealing with increasing amount of Te, until the molar ratio of Te to the sample reaches 1:10. By further increasing Te molar ratio, superconducting volume is gradually reduced. Resistivity and Hall effect measurements manifest that annealing in Te vapor delocalizes the charge carriers by removing excess Fe. The optimally Te annealed crystal shows homogeneous critical current densities with a large value of ∼4.3 x 105 A/cm2, which proves that the Te annealing is effective to induce bulk superconductivity in Fe1+yTe 1-xSex.

AB - We report a detailed study of the Te vapor annealing effect in Fe 1+yTe0.6Se0.4 single crystals. Bulk superconductivity can be gradually induced by annealing with increasing amount of Te, until the molar ratio of Te to the sample reaches 1:10. By further increasing Te molar ratio, superconducting volume is gradually reduced. Resistivity and Hall effect measurements manifest that annealing in Te vapor delocalizes the charge carriers by removing excess Fe. The optimally Te annealed crystal shows homogeneous critical current densities with a large value of ∼4.3 x 105 A/cm2, which proves that the Te annealing is effective to induce bulk superconductivity in Fe1+yTe 1-xSex.

KW - Critical current density

KW - Excess Fe

KW - FeTeSe

KW - Hall effect

KW - Iron chalcogenide

KW - Te annealing effect

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