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Low temperature resistivity plateau and non-saturating magnetoresistance in Type-II Weyl semimetal WP_2

机译:II型Weyl半型WP_2中的低温电阻率平台和非饱和磁阻

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We have studied the resistivity and magnetoresistance (MR) properties of the recently predicted type-II Weyl semimetal WP2. Polycrystalline WP2 is synthesized using solid state reaction and crystallizes in an orthorhombic structure with the Cmc2_1 spacegroup. The temperature dependent resistivity is enhanced with the application of magnetic field and a resistivity plateau is observed at low temperatures. We find a small dip in resistivity around 30K at 5T field suggesting that there might be a metal-insulator-like transition at higher magnetic fields. A non-saturating magnetoresistance is observed at low temperatures with maximum MR ~94% at 2K and 6T. The value of MR decreases with the increase in temperature. We see a deviation from Kohler's power law which implies that the system comprises of two types of charge carriers.
机译:我们研究了最近预测的II型Weyl半型WP2的电阻率和磁阻(MR)性质。使用固态反应合成多晶WP2,并用CMC2_1空间组合在正晶结构中结晶。随着磁场的应用,温度依赖性电阻率得到增强,并且在低温下观察到电阻率平台。我们在5T领域下发现了大约30k的电阻率的小倾角,表明在较高磁场下可能存在金属绝缘体样过渡。在低温下观察到不饱和磁阻,最大MR为2K和6T的MR〜94%。 MR的值随着温度的增加而降低。我们看到偏离科勒的权力法,这意味着该系统包括两种类型的电荷载流子。

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