论文标题
自旋轨耦合金属候选PBRE2O6
Spin-orbit-coupled metal candidate PbRe2O6
论文作者
论文摘要
我们研究氧化铅PBRE2O6作为候选旋转轨道偶联金属（SOCM），该金属（SOCM）吸引了很多关注，作为研究与大型自旋轨道相互作用相关的非常规Fermi液体不稳定性的测试场。该化合物包括在室温下中心对称R-3M结构中由RE5+（5d2）离子制成的调制蜂窝晶格。使用单晶的电阻率，磁化率和热容量测量显示，在TS1 = 265 K和TS2 = 123 K处进行了两个连续的一阶相变。令人惊讶的是，尽管晶体结构和电子结构可能存在至关重要的差异，但PBRE2O6与另一个SOCM候选CD2RE2O7非常相似，这表明PBRE2O6是SOCM。
We study the lead rhenium oxide PbRe2O6 as a candidate spin-orbit-coupled metal (SOCM), which has attracted much attention as a testing ground for studying unconventional Fermi liquid instability associated with a large spin-orbit interaction. The compound comprises a stack of modulated honeycomb lattices made of Re5+ (5d2) ions in a centrosymmetric R-3m structure at room temperature. Resistivity, magnetic susceptibility, and heat capacity measurements using single crystals reveal two successive first-order phase transitions at Ts1 = 265 K and Ts2 = 123 K. At Ts1, the magnetic susceptibility is enormously reduced and a structural transition to a monoclinic structure takes place, while relatively small changes are observed at Ts2. Surprisingly, PbRe2O6 bears a close resemblance to another SOCM candidate Cd2Re2O7 despite crucial differences in the crystal structure and probably in the electronic structure, suggesting that PbRe2O6 is an SOCM.
