Journal
PHYSICAL REVIEW B
Volume 100, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.115101
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-00ER45818]
- US Department of Energy
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Nodal line semimetals with symmetry protected band structure offer a platform for the investigation of a number of emerging quantum phenomena. Using first-principles calculation combined with symmetry analysis, we show that Ba3TiIr2O9 hosts a Dirac nodal line (DNL) along the A-L direction of the Brillouin zone, protected by the glide reflection symmetry. In the presence of the spin-orbit coupling, even though the DNL along the A-L direction is protected, DNLs along other directions as well as multiple nodal loops present in the system gap out. The gapped out Dirac nodal loops act as a source of spin Berry curvature, resulting in a large spin Hall conductivity (approximate to 300 h/e Omega(-1) cm(-1)). This suggests the possible application of the material as a spin current detector.
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