在非对称的MIrO3中,相关的迪拉克半金属状态 (M = Sr Ba 和 Ca)
1College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China.
概括
非对称的氧化物是强大的相互作用迪拉克半金属状态的宿主. 电子相关性,自旋轨道合和对称性保护驱动着异国情调的拓性质和费米弧.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 众所周知,非对称的对称性可以创建迪拉克半金属 (DSM) 状态.
- 对交互的DSM的研究仍然有限,在理解复杂的电子行为方面存在差距.
研究的目的:
- 为了研究和诱导非对称的氧化物中相互作用的迪拉克半金属状态.
- 探索电子相关性,自旋轨道合和对称性在驱动异国情调DSM现象中的相互作用.
主要方法:
- 使用密度函数理论 (DFT) 与动态平均场理论 (DMFT) 相结合.
- 采用双 Coulomb 校正方法来计算Coulomb 相互作用参数.
- 研究了SrIrO3,BaIrO3和CaIrO3.3的电子结构和拓性质.
主要成果:
- 发现狄拉克费米子源于的重组J_eff=1/2状态,受自旋轨道合和晶体场的影响.
- 在J_eff=1/2状态下观察到显著的质量增强,与实验结果一致.
- 鉴定了 (001) 表面上的拓面带和费米弧,由于非对称对称,与散装状态不同.
结论:
- 建立了非对称的氧化物作为一种新的相关的迪拉克半金属类别.
- 证明强大的电子-电子和自旋轨道相互作用对于实现这些强大的DSM状态至关重要.
- 突出了对称性保护在稳定异国情调的拓表面状态中的作用.
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