论文标题
关于高贵金属表面上CO原子零偏置异常的起源的新观点
A new view on the origin of zero-bias anomalies of Co atoms atop noble metal surfaces
论文作者
论文摘要
多体现象在物理学中至关重要。在冷凝物质中，它们的标志在涵盖电子，磁性，热力学和传输特性的广泛材料特征上是相当大的。他们可能会在光谱测量中烙印非平凡的签名，例如分配给Kondo，激子和偏光型特征的签名，其出现取决于所涉及的自由度。在这里，我们通过在存放在Cu，Ag和Au（111）底物上的CO原子上扫描隧道光谱检测到的系统零偏置异常，这些异常与从第一原则获得的基质几乎相同。这些特征源自有限的磁各向异性能引起的凝血自旋脱位，与通常的广泛解释相反，它们与近托共振有关。基于相对论时间相关的密度功能和多体扰动理论，我们进一步揭示了一种新的多体特征，即Spinaron，这是由于电子的相互作用和自旋脱位在明确定义的能量中定位的电子状态。
Many-body phenomena are paramount in physics. In condensed matter, their hallmark is considerable on a wide range of material characteristics spanning electronic, magnetic, thermodynamic and transport properties. They potentially imprint non-trivial signatures in spectroscopic measurements, such as those assigned to Kondo, excitonic and polaronic features, whose emergence depends on the involved degrees of freedom. Here, we address systematically zero-bias anomalies detected by scanning tunneling spectroscopy on Co atoms deposited on Cu, Ag and Au(111) substrates, which remarkably are almost identical to those obtained from first-principles. These features originate from gaped spin-excitations induced by a finite magnetic anisotropy energy, in contrast to the usual widespread interpretation relating them to Kondo resonances. Resting on relativistic time-dependent density functional and many-body perturbation theories, we furthermore unveil a new many-body feature, the spinaron, resulting from the interaction of electrons and spin-excitations localizing electronic states in a well defined energy.
