A simple expression for the conductance steps in the inelastic electron tunneling from spin excitations in a single magnetic atom adsorbed on a non-magnetic metal surfaces is derived. The inelastic coupling between the tunneling electron and the spin is via the exchange coupling and is treated in an impulsive approximation using the Tersoff-Hamann approximation for the tunneling between the tip and the sample. Our results for conductance steps justify the analysis carried out by Hirjebedin et al. [Science 317, 1199 (2007)] of observed step-like conductances by inelastic electron tunneling from spin excitations in a single magnetic adatom using a simple spin matrix element. In addition, our result gives a simple expression for the magnitudes of conductance steps and their lateral spatial variation with respect to the tip position, which can be calculated directly from spin-polarized wave functions at the Fermi level of the sample.
Inelastic electron tunneling in 2H-Ta$_x$Nb$_{1-x}$Se$_2$ evidenced by scanning tunneling spectroscopy
本文报道了用低温扫描隧道显微镜测量的2 H-Ta $_x$ Nb $_{1-x}$ Se $_2$（$x=0\sim 0.1$）单晶的隧道谱。在长时间难以理解的突出的间隙状特征被发现伴随着一些“间隙”精细结构。通过研究二阶导数光谱及其温度和磁场依赖性，我们能够证明非弹性电子隧穿是这些特征的起源，并获得了原子尺度下2 H-Ta $_x$ Nb $_{1-x}$ Se $_2$的Eliashberg函数，为研究相关过渡金属二硫属化物的局域Eliashberg函数和声子谱提供了一种潜在的方法.
Non-equilibrium Effects in Vibrational Modes Pumped by Inelastic Tunneling
State Key Laboratory of Micro-nano Engineering Science, Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院、李政道研究所微纳工程科学国家重点实验室）；SUPA, School of Physics and Astronomy, University of St Andrews（圣安德鲁斯大学物理与天文学院）；Department of Physics, King’s College London（伦敦国王学院物理系）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；Physikalisches Institut, Universität Bonn（波恩大学物理研究所）
Vibrational assignments and line shapes in inelastic tunnelling spectroscopy: H on Cu(100)
计算研究了扫描隧道显微镜（STM）结中单个氢原子在Cu（100）面上两个振动模的非弹性电子隧道谱（IETS）。本研究在密度泛函理论计算和STM-IETS的Lorente-Escherson理论的框架内解决了IETS中观察到的峰的振动分配和线形的关键问题。我们认为，在STM-IETS中只观察到一个单一的宽峰[L. J. Lauhon和W. Ho，Phys. Rev. Lett. 85，4566（2000）]不是由两种模式之一的非弹性和弹性振动贡献之间的任何对称限制或任何抵消引起的，而是由于由相当大的仪器加宽和模式之间窄的振动能量分离引起的两种模式的贡献的强烈重叠叠加。特别是，我们发现，这种扩大和大的不对称性的振动线的形状引起大量的表观振动能量的变化的两个模式，并减少其表观能量分离。
