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Home > Papers > Condensed-Matter-Physics

There are 314 papers published in subject: > since this site started.

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	1. The sp-hybrid Bonding of C, N and O to the fcc(001) Surface of Nickel and Rhodium
	Sun Changqing
	Physics 07 July 2005
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	Abstract:A brief review is given focusing on the nature, kinetics, dynamics and consequences of the sp-orbital hybrid bonding of C, N and O to the Ni/Rh(001) surfaces which give rise to the same kind of "radial and then the p4g clock" reconstruction . It is identified that the "radial" and the subsequent "clock" reconstruction result from the adsorbate-substrate bond formation with sp-orbital hybridization and that the driving force behind the reconstruction originates from the electrostatic interaction along the <11> direction.
	TO cite this article:Sun Changqing. The sp-hybrid Bonding of C, N and O to the fcc(001) Surface of Nickel and Rhodium[OL].[ 7 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2391


	2. Oxygen derived DOS features in the valence band of metals
	Sun Changqing,Sean Li
	Physics 07 July 2005
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	Abstract:From the perspective of sp-orbital hybrid bonding and its consequence on the behavior of valence electrons, new insight is presented into the nature of oxygen derived features in the valence band and above of metals. It is suggested that the crystal-geometry and the surface-morphology may vary from surface to surface and from material to material, the oxygen-derived features in energy space are substantially the same in nature. The derived features can be consistently specified as oxygen-metal bonding (- 5 ~ -8 eV), nonbond lone-pair of oxygen (- 1 ~ -2 eV), holes of metal ions (~ EF) and antibondng metal-dipole states (> EF), other than the addition of the 2s or 2p states of the isolated oxygen additives.
	TO cite this article:Sun Changqing,Sean Li. Oxygen derived DOS features in the valence band of metals[OL].[ 7 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2390

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	3. Electron-phonon interaction in nanostructures
	Sun Changqing,L. K. Pan
	Physics 05 July 2005
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	Abstract:Correlation between the size-enhanced Stokes shift and the size-enlarged band-gap expansion of porous silicon has been derived, which allows us to discriminate the effect of electron-phonon coupling from the effect of crystal binding on the blue shift in photoemission and photoabsorption of nansolid silicon. Matching predictions to the measured peak shift of both photoemission and absorption and to the measured band-gap expansion evidences the essentiality and validity of the recent bond order-length-strength (BOLS) correlation mechanism which suggests that the atomic coordination imperfection dictates the shape and size dependency of a nanosolid.
	TO cite this article:Sun Changqing,L. K. Pan. Electron-phonon interaction in nanostructures[OL].[ 5 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2367


	4. In verse Hall-Petch relationship in nanostructures
	Sun Changqing,S. Li,C. M. Li
	Physics 04 July 2005
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	Abstract:Temperature, size and bond nature dependence of nanosolid mechanics will be diesussed and qunantified in detail in terms of the recent BOLS correlation mechnism.
	TO cite this article:Sun Changqing,S. Li,C. M. Li. In verse Hall-Petch relationship in nanostructures[OL].[ 4 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2349


	5. Dimension, strength and thermal stability of a single C-C bond in carbon nanotubes
	Sun Changqing,H. L. Bai,B. K. Tay,S. Li,E. Y. Jiang
	Physics 01 July 2005
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	Abstract:Dimension, strength and thermal stability of a single C-C bond in carbon nanotubes
	TO cite this article:Sun Changqing,H. L. Bai,B. K. Tay, et al. Dimension, strength and thermal stability of a single C-C bond in carbon nanotubes [OL].[ 1 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2338


	6. Impact of bond order loss on surface and nanosolid mechanics
	Sun Changqing,L. K. Pan,C. M. Li
	Physics 29 June 2005
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	Abstract:An analytical solution shows that a competition between bond order loss and the associated bond strength gain of the lower coordinated atoms near the edge of a surface dictates the mechanics of the surface and hence a nanosolid. Bond order loss lowers the activation energy for atomic dislocation whereas bond strength gain enhances the energy density, or mechanical strength, in the region near the surface. Therefore, the surface is harder than the bulk interior at temperature far below the melting point (Tm) and the surface becomes softer at temperature closing to the surface Tm that drops because of bond order loss. Matching predictions to measurements reveals that transition happens to the Hall-Petch relationship for a nanosolid when the effect of bond order loss becomes dominant and the critical size of Hall-Petch transition depends intrinsically on the bond nature of the specimen and the ratio of T/Tm, where T is the temperature of operation.
	TO cite this article:Sun Changqing,L. K. Pan,C. M. Li. Impact of bond order loss on surface and nanosolid mechanics[OL].[29 June 2005] http://en.paper.edu.cn/en_releasepaper/content/2318


	7. Specific heat, strength, and maximal strain of atomic bond in a monatomic chain
	Sun Changqing
	Physics 28 June 2005
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	Abstract:Specific heat, strength, and maximal strain of atomic bond in an impurity-free monatomic chain.
	TO cite this article:Sun Changqing. Specific heat, strength, and maximal strain of atomic bond in a monatomic chain[OL].[28 June 2005] http://en.paper.edu.cn/en_releasepaper/content/2301


	8. Oxidation bonding kinetics: BBB correlation and its application (digest)
	Sun Changqing
	Physics 27 June 2005
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	Abstract:This report focus on the recent progress in understanding the behaviour of atoms and valence electrons involved in the process of oxidation, and some technological development driven by the new knowledge. Supplementary multimedia movie showing four-stage Cu3O2 bonding kinetics and the full article are available at: http://www.ntu.edu.sg/home/ECQSun/Cu3O2-kinetics.swf http://www.ntu.edu.sg/home/ecqsun/rtf/JPMS.pdf
	TO cite this article:Sun Changqing. Oxidation bonding kinetics: BBB correlation and its application (digest)[OL].[27 June 2005] http://en.paper.edu.cn/en_releasepaper/content/2282


	9. Size dependence of nanostructures (digest)
	Sun Changqing
	Physics 27 June 2005
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	Abstract:A review is presented on the recent progress in understanding the mechanism behind the tunability of nanosoild materials with emphasis on its practical applications in nanosolid materials design. Attempt has been made to reconcile all detectable and tunable properties and all available models by incorporating an intensively verified bond order-length-strength (BOLS) correlation mechanism as origin to all possible mechanisms and the huge database of experimental observations.
	TO cite this article:Sun Changqing. Size dependence of nanostructures (digest)[OL].[27 June 2005] http://en.paper.edu.cn/en_releasepaper/content/2281


	10. Dielectric suppression of nanosolid silicon
	Sun Changqing
	Physics 23 June 2005
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	Abstract:An analytical solution is presented showing that the dielectric susceptibility of a nanosolid depends functionally on the crystal binding that determine the band gap and hence the essential processes of electron polarization, and on the electron–phonon coupling that is often overlooked in theory considerations. The derived solution covers all the measured values of band gap expansion that is beyond the reach of available approaches. Consistency between predictions and impedance measurements evidences the impact of atomic coordination-number imperfection on the dielectric performance of nanometric semiconductors and the validity of the given solution.
	TO cite this article:Sun Changqing. Dielectric suppression of nanosolid silicon [OL].[23 June 2005] http://en.paper.edu.cn/en_releasepaper/content/2262

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