Spin-orbit scattering and quantum metallicity in ultrathin Be films

Y. M. Xiong; A. B. Karki; D. P. Young; P. W. Adams

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Spin-orbit scattering and quantum metallicity in ultrathin Be films

机译：超薄Be膜的自旋轨道散射和量子金属性

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We compare and contrast the low-temperature magnetotransport properties of ultrathin, insulating Be films with and without spin-orbit scattering (SOS). Beryllium films have very little intrinsic SOS, but by "dusting" them with submonolayer coverages of Au, one can introduce a well-controlled SOS rate. Pure Be films with sheet resistance R>R_Q exhibit a low-temperature negative magnetoresistance (MR) that saturates to the quantum resistance R_Q = h/e~2. This high-field quantum metal phase is believed to represent a different ground state of the system. In contrast, the corresponding negative MR in Be/Au films is greatly diminished, suggesting that, in the presence of strong SOS, the quantum metal phase can only be reached at field scales well beyond those typically available in a low-temperature laboratory.

机译：我们比较并对比了具有自旋轨道散射（SOS）和不具有自旋轨道散射（SOS）的超薄绝缘Be薄膜的低温磁传输特性。铍薄膜几乎没有固有的SOS，但是通过用亚单层覆盖的Au“粉尘”它们，可以引入可控的SOS速率。薄层电阻R> R_Q的纯Be膜表现出的低温负磁阻（MR）饱和到量子电阻R_Q = h / e〜2。人们认为这种高场量子金属相代表了系统的不同基态。相比之下，Be / Au膜中相应的负MR大大降低，这表明在存在强SOS的情况下，仅在超出低温实验室通常可用的场规模下才能达到量子金属相。

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来源
《Physical review》 |2009年第4期|020510.1-020510.4|共4页
作者
Y. M. Xiong; A. B. Karki; D. P. Young; P. W. Adams;
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作者单位

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA;

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA;

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA;

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA;

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low-Tc films; localization effects (anderson or weak localization); electronic transport phenomena in thin films;

机译：低Tc薄膜;本地化影响（安德森或弱本地化）;薄膜中的电子传输现象;

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机译：超薄铅薄膜中量子阱态的Rashba型自旋轨道分裂
2. Translational Inelasticity of NO and CO in Scattering from Ultrathin Metallic Films of Ag/Au(111) [J] . Steinsiek Christoph, Shirhattii Pranav R., Geweke Jan, The journal of physical chemistry, C. Nanomaterials and interfaces . 2018,第33期

机译：AG / AU超薄金属薄膜散射的缺陷和CO的翻译绝缘性（111）
3. Work Function Dependence of Vibrational Relaxation Probabilities: NO(v=2) Scattering from Ultrathin Metallic Films of Ag/Au(111) [J] . Steinsiek Christoph, Shirhatti Pranav R., Geweke Jan, The journal of physical chemistry, C. Nanomaterials and interfaces . 2018,第18期

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4. A Technique for Measuring the Film Thickness of Ultrathin Metallic Thin Films, 4-20 nm, Using Atomic Force Microscopy [C] . G. Acosta, D.D. Allred, R.C. Davis Society of Vacuum Coaters Annual Technical Conference; 20050423-28; Denver,CO(US) . 2005

机译：利用原子力显微镜测量4-20 nm超薄金属薄膜的膜厚度的技术
5. Optical characterization of polymer thin films: Specular and light scattering experiments and a new theoretical model for ultrathin films. [D] . Miller, Pascal. 1991

机译：聚合物薄膜的光学表征：镜面和光散射实验以及超薄膜的新理论模型。
6. Observation of spin-orbit magnetoresistance in metallic thin films onmagnetic insulators [O] . Lifan Zhou, Hongkang Song, Kai Liu, 2018

机译：金属薄膜自旋轨道磁阻的观测。磁绝缘子
7. Spin-Orbit Scattering and Quantum Metallicity in Ultra-Thin Be Films [O] . Xiong, Y. M., Karki, A. B., Young, D. P., 2009

机译：超薄膜中的自旋轨道散射和量子金属
8. Beryllium-Hydrogen Ultrathin Films. 1. Metallic Behavior of the BeH2 Monolayer. [R] . Wu, J. Z., Trickey, S. B., Boettger, J. C. 1990

机译：铍氢超薄膜。 1. BeH2单层的金属行为。

Spin-orbit scattering and quantum metallicity in ultrathin Be films

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