论文标题
观察Fermi液体相位与单一晶体纳米棒中的损坏对称性Pr $ _2 $ ir $ _2 $ o $ _7 $
Observation of Fermi liquid phase with broken symmetry in a single crystalline nanorod of Pr$_2$Ir$_2$O$_7$
论文作者
论文摘要
我们报告了在$ \ rm pr_2 ir_2 o_7 $的孤立的单晶纳米棒中以隔离的单晶纳米棒中出现突然破碎的对称性费米液态的实验证据。我们发现，在低温下，费米液体行为发作的明确签名是从高温下的磁磁性反转标志的标志性的标志性签名，其特征是不一致的近托散射的特征，以及$ \ rm t^2 $在低温下电阻率的依赖性。观察到一个电阻异常，在磁场存在下伴随着热滞后，表明巡回的元磁学。观察到的高温度下的高场负磁化率在低温下具有二次场依赖性，这很可能是由于静态旋转波动的抑制，以及在费米液体状态下磁性抗性特性的不可逆性表明存在不寻常的状态，具有断裂的旋转旋转旋转和时间反向旋转和时代反向对称性，hallsation sastatic sastatic sastatic s hastation sastation sastic s hastation sastic of sastation sastic of shastic of shastic of shastic s rast。这种电阻率和磁化剂的温度依赖性的主要特征可以在结合两个不同的杂交通道的现象学模型中解释，这在物理上与形成“ hastatic”费米液相形成的可能性一致。
We report experimental evidence of emergent broken symmetry Fermi liquid state in an isolated single crystalline nanorod of $\rm Pr_2 Ir_2 O_7$. We find clear signature of the onset of the Fermi liquid behavior at low temperature marked by the sign inversion of magnetoresistance from negative at high temperature, characteristic of incoherent Kondo scattering, to positive as well as a $\rm T^2$ dependence of resistivity at low temperature. A resistive anomaly is observed, which is accompanied by thermal hysteresis in the presence of magnetic field, suggesting itinerant metamagnetism. The observed high field negative magnetoresistance with quadratic field dependence at low temperature, which is most likely due to suppression of itinerant spin fluctuation, and the irreversibility of the magneto-resistive properties in the Fermi liquid regime suggest existence of an unusual state with broken spin rotation and time reversal symmetry, hallmark of `hastatic' order. The major features of such temperature dependence of resistivity and magnetoresistance can be explained in a phenomenological model incorporating two distinct hybridization channels, which is physically consistent with the possibility of the formation of the `hastatic' Fermi liquid phase.
