Nanostripe Pattern of NaCl Layers on Cu(110)

Abstract

A sodium chloride monolayer on a Cu(110) surface gives rise to a highly corrugated periodic nanostripe pattern of the (100) lattice as observed by scanning tunneling microscopy and low-energy electron diffraction. As revealed by density-functional calculations, this pattern is a consequence of the frustration of the overlayer-substrate chemical bonding produced by epitaxial mismatch. The coexistence of regions of strong Cu-Cl covalent and weak nonbonding interactions leads to a chemically induced topographic modulation here realized in a two-dimensional dielectric. The carpetlike growth of the NaCl layer across Cu step edges induces a distinct contrast inversion in the stripe pattern as a result of the change in epitaxial relationship due to the stacking sequence of the (110) Cu layers. It is demonstrated that the competition between local substrate-overlayer and intraoverlayer interactions can support a well-defined heteroepitaxial relationship of a ionic dielectric film and a metal surface, with important consequences for the nanoscale morphology and related properties.

Nuclear recoil correction to thegfactor of boron-like argon

“…In particular, the most accurate value of the electron mass was obtained in these studies [6]. The case of Li-like silicon manifests presently the most accurate verification of the many-electron QED effects in magnetic field [5,7]. Experimental and theoretical investigations of the g factor of heavy few-electron ions will provide stringent tests of bound-state QED in strong nuclear field.…”

“…During the last 15 years, the g-factor measurements in low-Z ions have reached an accuracy of 10 −10 [1,2,3,4,5] and motivated corresponding theoretical investigations. In particular, the most accurate value of the electron mass was obtained in these studies [6].…”

Recoil Effect on the g Factor of Li-Like Ions

“…High-precision measurements of the g factor of highly charged ions [1][2][3][4][5][6][7][8] have triggered a great interest to the corresponding theoretical calculations [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. To date, these experiment and theory allowed the most stringent tests of boundstate quantum electrodynamics (QED) in presence of a magnetic field and provided the most precise determination of the electron mass [7,27].…”

Atomistic and Electronic Structure Methods for Nanostructured Oxide Interfaces

“…in the case of (111)/(100) epitaxy or incommensurate phases, this effect is less important. However, in the case of incommensurate or Moiré phases, it can become locally important in the more epitaxial regions, as demonstrated in a specific examples [59,139]. (b) When the oxide is polar (geometric rumpling) as in category (i) phases, the dipole moment generated by the difference in height between the positively charged metal cations and the negatively charged oxygen anions exerts a field on the electrons of the metal underneath thus changing the energy necessary to reach the vacuum level.…”