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26 April 2024 |
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Observation of antiferromagnetic order collapse in the pressurized insulator LaMnPO | | Jing Guo
; J. W. Simonson
; Liling Sun
; Qi Wu
; Peiwen Gao
; Chao Zhang
; Dachun Gu
; Gabriel Kotliar
; Meigan Aronson
; Zhongxian Zhao
; | | Date: |
23 May 2013 | | Abstract: | The emergence of superconductivity in the iron pnictide and cuprate high
temperature superconductors usually accompanies the suppression of an
antiferromagnetically (AFM) ordered state in a corresponding parent compound
through the use of chemical doping or external pressure1-5. A great deal of
effort has been made to find superconductivity in Mn-based compounds6-14, which
are thought to bridge the gap between the two families of high temperature
superconductors7,15,16, but long-ranged AFM order was not successfully
suppressed via chemical doping in these investigations. Here we report the
first observation of the pressure-induced elimination of long-ranged AFM order
in LaMnPO single crystals that are iso-structural to the LaFeAsO
superconductor15,17. By combining in-situ high pressure resistance and ac
susceptibility measurements, we found that LaMnPO undergoes a crossover from an
AFM insulating to an AFM metallic state at a pressure ~20 GPa and that the
long-ranged AFM order collapses at a higher pressure ~32 GPa. Our findings are
of importance to explore potential superconductivity in Mn-based compounds and
to shed new light on the underlying mechanism of high temperature
superconductivity. | | Source: | arXiv, 1305.5426 | | Services: | Forum | Review | PDF | Favorites | |
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