论文标题
倾斜的锥形Weyl半法的快速核自旋松弛速率：Korringa关系的红移因子
Fast nuclear spin relaxation rates in tilted cone Weyl semimetals: Redshift factors from Korringa relation
论文作者
论文摘要
研究了3D倾斜的锥形Weyl半法（TCWSM）的自旋晶格松弛率。核自旋松弛速率作为温度和倾斜参数的函数表示。我们发现，放松率的行为是$（1-ζ^2）^{ - α} $，$α\ 9 $，其中$ 0 \leζ<1 $是倾斜参数。我们证明，$ζ\ Lessim 1 $的强劲增强，导致非常快的放松率，这是由倾斜本身的新型超精美相互作用的综合作用以及椭圆形Fermi表面的各向异性产生的。从Korringa关系中提取有效的状态密度（DOS）$ \tildeρ$，我们表明它与“ redShift系列”的DOS $ρ$有关，“红移因子” $ \tildeρ=ρ/\ sqrt {1-ζ^2} $。我们将这种关系解释为TCWSM中出现的潜在时空结构的NMR表现。
Spin lattice relaxation rate is investigated for 3D tilted cone Weyl semimetals (TCWSMs). The nuclear spin relaxation rate is presented as a function of temperature and tilt parameter. We find that the relaxation rate behaves as $(1-ζ^2)^{-α}$ with $α\approx 9$ where $0\le ζ< 1$ is the tilt parameter. We demonstrate that such a strong enhancement for $ζ\lesssim 1$ that gives rise to very fast relaxation rates, is contributed by the combined effect of a new hyperfine interactions arising from the tilt itself, and the anisotropy of the ellipsoidal Fermi surface. Extracting an effective density of states (DOS) $\tildeρ$ from the Korringa relation, we show that it is related to the DOS $ρ$ of the tilted cone dispersion by the "redshift factor" $\tildeρ=ρ/\sqrt{1-ζ^2}$. We interpret this relation as NMR manifestation of an emergent underlying spacetime structure in TCWSMs.
