Atomic-scale charge transport properties are not only of significant fundamental interest but also highly relevant for numerous technical applications. However, experimental methods which are capable of detecting charge transport at the relevant single-digit nanometer length scales are scarce. Here we report on molecular nanoprobe (MONA) experiments on Pd(110) where we utilize the charge carrier-driven switching of a single cis-2-butene molecule to detect ballistic transport properties over length scales of a few nanometers. Our data demonstrate a striking angular dependence with a dip in charge transport along the [1-10]-oriented atomic rows and a peak in the transverse [001] direction. The narrow angular width of both features and distance-dependent measurements suggest that the nanometer-scale ballistic transport properties of metallic surfaces is significantly influenced by the atomic structure.
Directional ballistic magnetotransport in the delafossite metals PdCoO$_2$ and PtCoO$_2$
Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；Scottish Universities Physics Alliance（苏格兰大学物理联盟）；School of Physics and Astronomy, University of St Andrews（圣安德鲁斯大学物理与天文学学院）；Department of Physics, Stanford University（斯坦福大学物理系）；Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory（斯坦福材料能源科学研究所，SLAC国家加速器实验室）；Department of Physics, University of Washington（华盛顿大学物理系）；Department of Materials Science and Engineering, University of Washington（华盛顿大学材料科学与工程系）；Max Planck Institute for the Structure and Dynamics of Matter（马克斯·普朗克物质结构与动力学研究所）
Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi$_4$Br$_4$
Université Paris-Saclay（巴黎萨克雷大学）；CNRS（法国国家科学研究中心）；Laboratoire de Physique des Solides（固体物理实验室）；Materials and Structures Laboratory, Institute of Science Tokyo（东京科学材料结构实验室）；Centre de Nanosciences et de Nanotechnologies（纳米科学与纳米技术中心）；Université de Lille（里尔大学）；Institut d’Electronique, de Microélectronique et de Nanotechnologie（电子、微电子和纳米技术研究所）
Spatially-resolved luminescence and crystal structure of single core-shell nanowires measured in the as-grown geometry
我们报道了单个的、生长态的核-多壳GaAs/In $_{0.15}$ Ga $_{0.85}$ As/GaAs/AlAs/GaAs纳米线的结构和光学性质之间的直接相关性。通过分子束外延在预先图案化的Si（111）衬底上制造，在一排良好分离的成核位置上，可以在生长的几何形状中访问单个纳米线。通过同步辐射纳米探针X射线衍射技术监测轴向111布拉格反射，揭示了沿纳米线生长轴的多型体分布。对于相同的纳米线，空间分辨的发射特性，通过阴极发光高光谱线扫描在扫描电子显微镜。相关的两个测量，我们揭示了一个蓝移的壳量子阱发射能量结合的发射强度增加的片段表现出的混合结构的交替纤锌矿和锌的堆叠相比，纯晶体多型体。这种混合结构的存在下，独立地证实了横截面透射电子显微镜。
