The electronic behavior of a radially collapsed armchair carbon nanotube encountered by scanning tunneling microscopy experiments is presented in a study that probes the electronic changes directly associated with the atomically resolved structural perturbations. The finite density of states obtained through scanning tunneling spectroscopy at the Fermi energy when the interspacing of the flatte...

Starting with the equivalence of the rest energy of a particle to an amount of the radiant energy characterized by a frequency, in addition to the usual relativistic transformation rules leading to the waveparticle duality, we investigate the case in which this frequency is an internal propery of the particle. This kind of interpretation of the frequency is shown to be relevant to the tunneling...

We show that the observable rate of tunneling ionization of a molecule in intense low-frequency laser field is affected by nuclear motion and can essentially differ from a bare electronic characteristic calculated for fixed nuclei. Both the absolute value of the rate and the shape of its orientation dependence are affected. The effect is significant for I ∼ 1014 W/cm2 and becomes more pronounce...

We show that the asymmetric tunneling spectrum observed in the cuprate superconductors stems from the existence of a competing order. The competition between the competing order and superconductivity can create a charge depletion region near the surface. The asymmetric response of the depletion region as the function of the external voltage causes the asymmetric tunneling spectrum. The effect i...

An efficient software tool for investigations on novel stacked gate dielectrics with emphasis on reliability has been developed. The accumulation, depletion, and inversion of carriers in MOS capacitors is properly considered for nand p-substrates. The effect of carrier quantization on the electrostatics and the leakage current is included by treating carriers in quasi-bound states (QBS) and con...

We report on the first observation of superconductivity in a double atomic layer of Tl on Si(1 1 1) using in situ electrical resistivity measurements in ultrahigh vacuum. The structure of the Tl bilayer was characterized by a set of techniques, including scanning tunneling microscopy, electron diffraction and photoemission spectroscopy, which confirmed the metastability and metallic nature of t...

We demonstrate that the well-known Sis111d-s7 3 7d superlattice buried under as much as 100 Å of crystalline Pb can be directly imaged with a scanning tunneling microscope at 77 K. The unexpected transparency of the metal and the high lateral resolution are the result of a nondiffractive scattering of the electrons at the interface. We attribute this phenomenon to a large anisotropy of the effe...

We have investigated the decapped GaAs~311!A surface using both scanning tunneling microscopy and synchrotron-radiation photoemission. While our data are in broad agreement with the structural model of GaAs~311!A proposed in a recent study @Wassermeier et al., Phys. Rev. B 51, 14 721 ~1995!#, we find considerable differences in the surface order. In particular, the As dimer rows are unbroken ov...

scanning hall probe microscopy (shpm) is a scanning probe microscopy technique developed to observe and image magnetic fields locally. this method is based on application of the hall effect, supplied by a micro hall probe attached to the end of cantilever as a sensor.  shpm provides direct quantitative information on the magnetic state of a material and can also image magnetic induction under a...