Superconductivity tuned by the iron vacancy order in KxFe2-ySe2

Wei BAO Wei (鲍威); LI Guan-Nan (李冠男); HUANG Qing-Zhen (黄清镇); CHEN Gen-Fu (陈根富); HE Jun-Bao (何俊宝); WANG Du-Ming (王笃明); M. A. Green; QIU Yi-Ming (邱义铭); LUO Jian-Lin (雒建林); WU Mei-Mei (武梅梅)

doi:10.1088/0256-307X/30/2/027402

Superconductivity tuned by the iron vacancy order in K_xFe_2-ySe₂

BAO Wei (鲍威)^*
, LI Guan-Nan (李冠男)
, HUANG Qing-Zhen (黄清镇)
, CHEN Gen-Fu (陈根富)
, HE Jun-Bao (何俊宝)
, WANG Du-Ming (王笃明)
, M. A. Green
, QIU Yi-Ming (邱义铭)
, LUO Jian-Lin (雒建林)
, WU Mei-Mei (武梅梅)

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

47 Citations (Scopus)

Abstract

Combining in-depth neutron diffraction and systematic bulk studies, we discover that the 5 × 5 Fe vacancy order, with its associated block antiferromagnetic order, is the ground state with varying occupancy ratios of the iron 16i and vacancy 4d sites across the phase-diagram of K_xFe_2-ySe₂ . The orthorhombic order, with one of the four Fe sites vacant, appears only at intermediate temperatures as a competing phase. The material experiences an insulator to metal crossover when the √5 × √5 order is highly developed. Superconductivity occurs in such a metallic phase.

©2013 Chinese Physical Society and IOP Publishing Ltd

Original language	English
Article number	027402
Journal	Chinese Physics Letters
Volume	30
Issue number	2
DOIs	https://doi.org/10.1088/0256-307X/30/2/027402
Publication status	Published - Feb 2013
Externally published	Yes

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BAO Wei (鲍威), LI Guan-Nan (李冠男), HUANG Qing-Zhen (黄清镇), CHEN Gen-Fu (陈根富), HE Jun-Bao (何俊宝), WANG Du-Ming (王笃明), Green, M. A., QIU Yi-Ming (邱义铭), LUO Jian-Lin (雒建林), & WU Mei-Mei (武梅梅) (2013). Superconductivity tuned by the iron vacancy order in K_xFe_2-ySe₂. Chinese Physics Letters, 30(2), Article 027402. https://doi.org/10.1088/0256-307X/30/2/027402

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title = "Superconductivity tuned by the iron vacancy order in KxFe2-ySe2",

abstract = "Combining in-depth neutron diffraction and systematic bulk studies, we discover that the 5 × 5 Fe vacancy order, with its associated block antiferromagnetic order, is the ground state with varying occupancy ratios of the iron 16i and vacancy 4d sites across the phase-diagram of KxFe2-ySe2 . The orthorhombic order, with one of the four Fe sites vacant, appears only at intermediate temperatures as a competing phase. The material experiences an insulator to metal crossover when the √5 × √5 order is highly developed. Superconductivity occurs in such a metallic phase. {\textcopyright}2013 Chinese Physical Society and IOP Publishing Ltd ",

author = "\{BAO Wei (鲍威)\} and \{LI Guan-Nan (李冠男)\} and \{HUANG Qing-Zhen (黄清镇)\} and \{CHEN Gen-Fu (陈根富)\} and \{HE Jun-Bao (何俊宝)\} and \{WANG Du-Ming (王笃明)\} and Green, \{M. A.\} and \{QIU Yi-Ming (邱义铭)\} and \{LUO Jian-Lin (雒建林)\} and \{WU Mei-Mei (武梅梅)\}",

year = "2013",

month = feb,

doi = "10.1088/0256-307X/30/2/027402",

language = "English",

volume = "30",

journal = "Chinese Physics Letters",

issn = "0256-307X",

publisher = "IOP Publishing",

number = "2",

}

BAO Wei (鲍威), LI Guan-Nan (李冠男), HUANG Qing-Zhen (黄清镇), CHEN Gen-Fu (陈根富), HE Jun-Bao (何俊宝), WANG Du-Ming (王笃明), Green, MA, QIU Yi-Ming (邱义铭), LUO Jian-Lin (雒建林) & WU Mei-Mei (武梅梅) 2013, 'Superconductivity tuned by the iron vacancy order in K_xFe_2-ySe₂', Chinese Physics Letters, vol. 30, no. 2, 027402. https://doi.org/10.1088/0256-307X/30/2/027402

TY - JOUR

T1 - Superconductivity tuned by the iron vacancy order in KxFe2-ySe2

AU - BAO Wei (鲍威), null

AU - LI Guan-Nan (李冠男), null

AU - HUANG Qing-Zhen (黄清镇), null

AU - CHEN Gen-Fu (陈根富), null

AU - HE Jun-Bao (何俊宝), null

AU - WANG Du-Ming (王笃明), null

AU - Green, M. A.

AU - QIU Yi-Ming (邱义铭), null

AU - LUO Jian-Lin (雒建林), null

AU - WU Mei-Mei (武梅梅), null

PY - 2013/2

Y1 - 2013/2

N2 - Combining in-depth neutron diffraction and systematic bulk studies, we discover that the 5 × 5 Fe vacancy order, with its associated block antiferromagnetic order, is the ground state with varying occupancy ratios of the iron 16i and vacancy 4d sites across the phase-diagram of KxFe2-ySe2 . The orthorhombic order, with one of the four Fe sites vacant, appears only at intermediate temperatures as a competing phase. The material experiences an insulator to metal crossover when the √5 × √5 order is highly developed. Superconductivity occurs in such a metallic phase. ©2013 Chinese Physical Society and IOP Publishing Ltd

AB - Combining in-depth neutron diffraction and systematic bulk studies, we discover that the 5 × 5 Fe vacancy order, with its associated block antiferromagnetic order, is the ground state with varying occupancy ratios of the iron 16i and vacancy 4d sites across the phase-diagram of KxFe2-ySe2 . The orthorhombic order, with one of the four Fe sites vacant, appears only at intermediate temperatures as a competing phase. The material experiences an insulator to metal crossover when the √5 × √5 order is highly developed. Superconductivity occurs in such a metallic phase. ©2013 Chinese Physical Society and IOP Publishing Ltd

UR - https://www.scopus.com/pages/publications/84874323326

UR - https://www.scopus.com/pages/publications/84874323326#tab=impact

U2 - 10.1088/0256-307X/30/2/027402

DO - 10.1088/0256-307X/30/2/027402

M3 - RGC 21 - Publication in refereed journal

SN - 0256-307X

VL - 30

JO - Chinese Physics Letters

JF - Chinese Physics Letters

IS - 2

M1 - 027402

ER -

Superconductivity tuned by the iron vacancy order in K_xFe_2-ySe₂

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Superconductivity tuned by the iron vacancy order in K_xFe_2-ySe₂