Publications

Export 6 results:
Sort by: [ Author (Asc)] Title Type Year
A B C D E F G H I J K [L] M N O P Q R S T U V W X Y Z   [Show ALL]
L
Lai, M. Y., Chou J. P., Utas O. A., Denisov N. V., Kotlyar V. G., Gruznev D., Matetsky A., Zotov A. V., Saranin A. A., Wei C. M., & Wang Y. L. (2011).  Broken Even-Odd Symmetry in Self-Selection of Distances between Nanoclusters due to the Presence or Absence of Topological Solitons. Physical Review Letters. 106, 4., Apr, Number 16 AbstractWebsite

Depositing particles randomly on a 1D lattice is expected to result in an equal number of particle pairs separated by even or odd lattice units. Unexpectedly, the even-odd symmetry is broken in the self-selection of distances between indium magic-number clusters on a Si(100)-2 x 1 reconstructed surface. Cluster pairs separated by even units are less abundant because they are linked by silicon atomic chains carrying topological solitons, which induce local strain and create localized electronic states with higher energy. Our findings reveal a unique particle-particle interaction mediated by the presence or absence of topological solitons on alternate lattices.

Lee, H. - W., Hsing C. - R., Chang C. - M., & Wei C. - M. (2020).  Electronic structures of 24-valence-electron full Heusler compounds investigated by density functional and GW calculations. Journal of Physics: Condensed Matter. 32, 175501. Abstract

n/a

Lian, W. - N., Shiue J., Wang H. - H., Hong W. - C., Shih P. - H., Hsu C. - K., Huang C. - Y., Hsing C. - R., Wei C. - M., Wang J. - K., & Wang Y. - L. (2015).  Rapid detection of copper chlorophyll in vegetable oils based on surface-enhanced Raman spectroscopy. FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT. 32, 627-634., {MAY 4}, Number {5} Abstract

n/a

Lin, T. - J., Hsing C. - R., Wei C. - M., & Kuo J. - L. (2016).  Structure prediction of the solid forms of methanol: an ab initio random structure searching approach. PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 18, 2736-2746., {JAN 28}, Number {4} Abstract

n/a

Liu, H. J., Chou J. P., Li R. W., Wei C. M., & Miki K. (2011).  Trimeric precursors in formation of Al magic clusters on a Si(111)-7 x 7 surface. Physical Review B. 83, 6., Feb, Number 7 AbstractWebsite

The formation process of Al magic clusters on the Si(111)-7 x 7 surface was investigated by means of a variable-temperature scanning tunneling microscope (STM) in situ and was interpreted using density-functional theory (DFT) calculations. At a growth temperature of 450 degrees C, Al atoms hopped among the corner, center, and T4 sites and also across the dimer rows on the Si(111)-7 x 7 surface. At low coverage below 0.08 ML, a single Al atom was adsorbed on the corner or center site. When the coverage was increased to 0.08 ML, Al dimers and trimers appeared, and Al magic clusters were also observed. However, no Al tetramers or pentamers were experimentally confirmed. Careful analysis of STM images suggests that Al trimers could be key precursors for the formation of Al magic clusters, and DFT calculations verified this interpretation. Total-energy calculation results using DFT reveal that this is due to the small energy gain from Al trimer to Al tetramer. These results are important for understanding the atomic structure and the formation mechanism of the magic clusters on the Si(111)-7 x 7 surface.

Lo, W. S., Chien T. S., Fang B. S., Wei C. M., & Mei W. N. (1998).  Photoelectron-diffraction studies of Nb(001). Surface Review and Letters. 5, 1035-1041., Oct, Number 5 AbstractWebsite

Photoelectron-diffraction studies of Nb(001) have been performed to determine the first-interlayer contraction using Mg K alpha radiation (h nu = 1253.6 eV) as an excitation source. Photoemission intensities of the 3d(5/2) core level were measured as a function of the polar angle along several azimuths on the single-crystal surface. The 202.3-eV (205.0-eV) binding energy for the 3d(5/2) (3d(3/2)) core level was well resolved in the photoemission spectra, where the peak intensity could be easily evaluated by curve-fitting processes. Large oscillations of the 3d(5/2) intensity as a function of the polar angle due to forward-focusing were observed. Based on multiple-scattering calculations for several first-interlayer spacings ranging from the bulk value to 16% contraction, the best agreement with experiment was obtained for a (13 +/- 5)% contraction of the first-interlayer spacing.