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 16#em/em# 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.
Article Text
-
-
-
About This Article
Cite this article:
BAO Wei, LI Guan-Nan, HUANG Qing-Zhen, CHEN Gen-Fu, HE Jun-Bao, WANG Du-Ming, M. A. Green, QIU Yi-Ming, LUO Jian-Lin, WU Mei-Mei. Superconductivity Tuned by the Iron Vacancy Order in KxFe2?ySe2[J]. Chin. Phys. Lett., 2013, 30(2): 027402. DOI: 10.1088/0256-307X/30/2/027402
|
BAO Wei, LI Guan-Nan, HUANG Qing-Zhen, CHEN Gen-Fu, HE Jun-Bao, WANG Du-Ming, M. A. Green, QIU Yi-Ming, LUO Jian-Lin, WU Mei-Mei. Superconductivity Tuned by the Iron Vacancy Order in KxFe2?ySe2[J]. Chin. Phys. Lett., 2013, 30(2): 027402. DOI: 10.1088/0256-307X/30/2/027402
|
BAO Wei, LI Guan-Nan, HUANG Qing-Zhen, CHEN Gen-Fu, HE Jun-Bao, WANG Du-Ming, M. A. Green, QIU Yi-Ming, LUO Jian-Lin, WU Mei-Mei. Superconductivity Tuned by the Iron Vacancy Order in KxFe2?ySe2[J]. Chin. Phys. Lett., 2013, 30(2): 027402. DOI: 10.1088/0256-307X/30/2/027402
|
BAO Wei, LI Guan-Nan, HUANG Qing-Zhen, CHEN Gen-Fu, HE Jun-Bao, WANG Du-Ming, M. A. Green, QIU Yi-Ming, LUO Jian-Lin, WU Mei-Mei. Superconductivity Tuned by the Iron Vacancy Order in KxFe2?ySe2[J]. Chin. Phys. Lett., 2013, 30(2): 027402. DOI: 10.1088/0256-307X/30/2/027402
|
DownLoad: