论文标题
尖晶石复合MGV $ _2 $ o $ _4 $的铁磁阶段
Ferromagnetic phase of spinel compound MgV$_2$O$_4$ and its spintronics properties
论文作者
论文摘要
尖晶石化合物，MGV $ _2 $ o $ _4 $，被称为高度沮丧的磁铁，已经在实验和理论上对其异国情调的量子磁状态进行了广泛的研究。但是，由于其固有的绝缘性质在其抗铁磁（AFM）基态中，其在旋转型中的现实应用非常有限。在这里，根据第一原理计算，我们检查了Mgv $ _2 $ o $ $ _4 $的铁磁（FM）阶段，该阶段被发现接近Fermi水平的三维平坦乐队（FB），因此产生了大型霍尔（Ahe），产生了较大的异常效果（ahe，$ c，$σ\ 670 \ 670 \ cd，cd，cd，cd，cd.-1cc. cm^{ - 1} $）。我们的计算表明，由于出色的晶格匹配，即使在与MGO接口后，也保留了MGV $ _2 $ o $ _4 $的半金属功能，这可能是用于SpinTronics应用的有希望的旋转过滤材料。最后，我们探索通过应变和掺杂工程稳定此FM相的实验可行性。我们的研究表明，实验量的孔掺杂可能会诱导AFM-FM相变。
Spinel compound, MgV$_2$O$_4$, known as a highly frustrated magnet has been extensively studied both experimentally and theoretically for its exotic quantum magnetic states. However, due to its intrinsic insulating nature in its antiferromagnetic (AFM) ground state, its realistic applications in spintronics are quite limited. Here, based on first-principles calculations, we examine the ferromagnetic (FM) phase of MgV$_2$O$_4$, which was found to host three-dimensional flat band (FB) right near the Fermi level, consequently yielding a large anomalous Hall effect (AHE, $σ\approx 670\,Ω^{-1}\cdot cm^{-1}$). Our calculations suggest that the half-metallicity feature of MgV$_2$O$_4$ is preserved even after interfacing with MgO due to the excellent lattice matching, which could be a promising spin filtering material for spintronics applications. Lastly, we explore experimental feasibility of stabilizing this FM phase through strain and doping engineering. Our study suggests that experimentally accessible amount of hole doping might induce a AFM-FM phase transition.
