Robust antiferromagnetism preventing superconductivity in pressurized (Ba0.61K0.39)Mn2Bi2
- Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
BaMn2Bi2 possesses an iso-structure of iron pnictide superconductors and similar antiferromagnetic (AFM) ground state to that of cuprates, therefore, it receives much more attention on its properties and is expected to be the parent compound of a new family of superconductors. When doped with potassium (K), BaMn2Bi2 undergoes a transition from an AFM insulator to an AFM metal. Consequently, it is of great interest to suppress the AFM order in the K-doped BaMn2Bi2 with the aim of exploring the potential superconductivity. In this paper, we report that external pressure up to 35.6 GPa cannot suppress the AFM order in the K-doped BaMn2Bi2 to develop superconductivity in the temperature range of 300 K–1.5 K, but induces a tetragonal (T) to an orthorhombic (OR) phase transition at ~20 GPa. Theoretical calculations for the T and OR phases, on basis of our high-pressure XRD data, indicate that the AFM order is robust in the pressurized Ba0.61K0.39Mn2Bi2. We conclude that both of our experimental and theoretical results suggest that the robust AFM order essentially prevents the emergence of superconductivity.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- XDB07020300; 2011CBA00100; 11427805; 91321207; AC05-00OR22725
- OSTI ID:
- 1259688
- Alternate ID(s):
- OSTI ID: 1286829
- Journal Information:
- Scientific Reports, Vol. 4; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
From Hund's insulator to Fermi liquid: Optical spectroscopy study of K doping in
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journal | September 2015 |
Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
|
journal | May 2017 |
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