准一维Li $_{0.9}$ Mo PDMATHAAB O $_{17}$的定向场诱导金属化
Directional field-induced metallization of quasi-one-dimensional Li$_{0.9}$Mo$_6$O$_{17}$
摘要：
我们报道了一个详细的磁输运研究的高度各向异性准一维氧化物Li $_{0.9}$ Mo $_6$ O $_{17}$，其在链电阻率发散低于温度$T_{\rm min} \sim$ 25 K。对于$T < T_{\rm min}$，平行于导电链施加的磁场引起大的负磁阻，并最终恢复金属状态。我们证明了这种绝缘体/金属交叉是场诱导抑制的密度波间隙在一个高度一维导体的结果。在所研究的最高磁场下，有证据表明可能出现一种新的超导态，其起始温度为$T_c >$ 10 K。
英文摘要：
We report a detailed magnetotransport study of the highly anisotropic quasi-one-dimensional oxide Li$_{0.9}$Mo$_6$O$_{17}$ whose in-chain electrical resistivity diverges below a temperature $T_{\rm min} \sim$ 25 K. For $T < T_{\rm min}$, a magnetic field applied parallel to the conducting chain induces a large negative magnetoresistance and ultimately, the recovery of a metallic state. We show evidence that this insulator/metal crossover is a consequence of field-induced suppression of a density-wave gap in a highly one-dimensional conductor. At the highest fields studied, there is evidence for the possible emergence of a novel superconducting state with an onset temperature $T_c >$ 10 K.
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