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Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2
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Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2
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Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2
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Paper
Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2
2022
Overview
Recent discoveries of charge order and electronic nematic order in the iron-based superconductors and cuprates have pointed towards the possibility of nematic and charge fluctuations playing a role in the enhancement of superconductivity. The Ba1-xSrxNi2As2 system, closely related in structure to the BaFe2As2 system, has recently been shown to exhibit both types of ordering without the presence of any magnetic order. We report single crystal X-ray diffraction, resistance transport measurements, and magnetization of \\BaSrLate, providing evidence that the previously reported incommensurate charge order with wavevector \\((0,0.28,0)_{tet}\\) in the tetragonal state of \\BaNi~vanishes by this concentration of Sr substitution together with nematic order. Our measurements suggest that the nematic and incommensurate charge orders are closely tied in the tetragonal state, and show that the \\((0,0.33,0)_{tri}\\) charge ordering in the triclinic phase of BaNi2As2 evolves to become \\((0,0.5,0)_{tri}\\) charge ordering at \\(x\\)=0.65 before vanishing at \\(x\\)=0.71.
Publisher
Cornell University Library, arXiv.org
Subject
