论文标题
nematic量子关键点附近的非富尔米液体运输$ _ {1-x} $ s $ _x $ superconductor
Non-Fermi liquid transport in the vicinity of nematic quantum critical point of FeSe$_{1-x}$S$_x$ superconductor
论文作者
论文摘要
非纤维化液体是奇怪的金属，其物理特性因量子强大而定性地偏离了常规金属的特性。在本文中，我们报告了FESE $ _ {1-x} $ s $ _x $ superconductor上的运输测量值，该$ _x $ superconductor具有nematic订单的量子关键点，而无需伴随抗fiferromagnetism。我们发现，除了在接近普朗克限制的t $ $ρ_{xx} \ propto t $ $ρ_{xx} \ propto t $之外，霍尔角度随$ \cotθ_ {\ rm h} \ propto t^2 $而变化。 \ tan^2θ_ {\ rm h} $在列量量子关键点附近。这组异常的电荷传输特性表明，与铜矿，铁刺皮和沉重的费米昂超导体报告的相似之处很明显，这表明，具有$ {\ bf q} \ 0 $的列级的临界波动也可能导致Fermi液体液体描述的故障。
Non-Fermi liquids are strange metals whose physical properties deviate qualitatively from those of conventional metals due to strong quantum fluctuations. In this paper, we report transport measurements on the FeSe$_{1-x}$S$_x$ superconductor, which has a quantum critical point of a nematic order without accompanying antiferromagnetism. We find that in addition to a linear-in-temperature resistivity $ρ_{xx}\propto T$, which is close to the Planckian limit, the Hall angle varies as $\cot θ_{\rm H} \propto T^2$ and the low-field magnetoresistance is well scaled as $Δρ_{xx}/ρ_{xx}\propto \tan^2 θ_{\rm H}$ in the vicinity of the nematic quantum critical point. This set of anomalous charge transport properties shows striking resemblance with those reported in cuprate, iron-pnictide and heavy fermion superconductors, demonstrating that the critical fluctuations of a nematic order with ${\bf q} \approx 0$ can also lead to a breakdown of the Fermi liquid description.
