Structural phase transition in TmxFe1-xSe0.85 (Tm = Mn and Cu) and its relation to superconductivity

2009/07/23 by Tzu-Wen Huang, Huang, Tzu-Wen, Ta-Kun Chen +19
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.0907.4001

openalex publication_date 2009/07/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this letter, we report the results of detailed studies on Mn- and Cu-substitution to Fe-site of beta-FeSe, namely MnxFe1-xSe0.85 and CuxFe1-xSe0.85. The results show that with only 10 at% Cu-doping the compound becomes a Mott insulator. Detailed temperature dependent structural analyses of these Mn- and Cu-substituted compounds show that the structural transition, which is associated with the changes in the building block FeSe4 tetrahedron, is essential to the occurrence of superconductivity in beta-FeSe.

Related

• Emergence of superconductivity in strongly correlated hole-dominated Fe1-xSe
• Fe-vacancy ordered Fe4Se5: The insulating parent phase of FeSe superconductor
• Anomalous Lattice Effect Originated Metal-Insulator Transition in FeSe_x
• Transition from insulator to superconductor and significant enhancement of superconductivity in FeSe films via tuning Fe-vacancy disorders
• Quantum criticality in quasi-binary compounds of iron-based superconductors