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Resistance and magnetoresistance in platinum nanowire: Implications to Kohler's rule
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-05-06 , DOI: 10.1016/j.physb.2020.412239
Amit Roy , V. Akshaya Shiva , S. Mátéfi-Tempfli , M. Mátéfi-Tempfli , R. Kiebooms , Reghu Menon

The temperature dependence of resistance (1.5–300 K) of electrochemically deposited vertically align Platinum nanowires (Pt-NWs) is characterized by using the Bloch-Grüneisen formalism (BG), Fuchs-Sondheimer theory (FS), Mayadas-Shatzkes model (MS) and Debye temperature (θR). The low value of θR ∼34 K in Pt-NWs as compared to bulk Pt (θR ∼ 242 K) shows significant phonon softening associated with the disorder. Fit to the temperature dependence resistance confirms the contribution of surface scattering and grain-boundary scattering where surface scattering dominates over grain-boundary scattering by a factor of 2. The low-temperature magneto-transport data up to 11 T in Pt-NWs shows deviations from Kohler's rule, especially in the longitudinal direction. This variation in transverse versus longitudinal MR can be used to probe the directional dependent scattering from disorder in NWs.



中文翻译:

铂纳米线的电阻和磁阻:对科勒法则的影响

电化学沉积的垂直排列铂纳米线(Pt-NWs)的电阻(1.5–300 K)的温度依赖性通过Bloch-Grüneisen形式主义(BG),Fuchs-Sondheimer理论(FS),Mayadas-Shatzkes模型(MS )和德拜温度(θ - [R )。θ的低值- [R〜34 K的铂纳米线相比,散装的Pt(θ ř 约242 K)表现出与疾病有关的明显的声子软化。符合温度依赖性的电阻确定了表面散射和晶界散射的贡献,其中表面散射在晶界散射中占主导地位,为2倍。Pt-NWs中高达11 T的低温磁传输数据显示出偏差从科勒定律出发,尤其是在纵向方向上。横向和纵向MR的这种变化可用于探测NW中无序的方向相关散射。

更新日期:2020-05-06
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