High-pressure single-crystal X-ray diffraction plus DFT show a second-order ferroelastic transition to orthorhombic RuO2 at about 13 GPa, with the calculated Dirac nodal line shifting across the Fermi level near 20 GPa.
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Tunable Dirac nodal line in orthorhombic RuO$_2$
High-pressure single-crystal X-ray diffraction plus DFT show a second-order ferroelastic transition to orthorhombic RuO2 at about 13 GPa, with the calculated Dirac nodal line shifting across the Fermi level near 20 GPa.