A dynamical calculation of the state equation is presented to give a good prediction of the melting temperature for silicon which is much better than the molecular dynamics simulation result and agrees satisfactorily ...A dynamical calculation of the state equation is presented to give a good prediction of the melting temperature for silicon which is much better than the molecular dynamics simulation result and agrees satisfactorily with the experimental value.展开更多
Lattice dynamics of strained(Si)_(4)/(Ge)_(4) superlattice grown pseudomorphically on (001)-oriented Si_(1-x)Ge_(x)(0≤x≤1)substrate is investigated.In the present calculations,the effects of strain and substrate are...Lattice dynamics of strained(Si)_(4)/(Ge)_(4) superlattice grown pseudomorphically on (001)-oriented Si_(1-x)Ge_(x)(0≤x≤1)substrate is investigated.In the present calculations,the effects of strain and substrate are discussed.展开更多
Lattice dynamics of ^(36)Ar are investigated by Keating model.Owing to the short-range character of the interactions in rare-gas solids,only the nearest neighbour interactions were taken into account.The calculated ph...Lattice dynamics of ^(36)Ar are investigated by Keating model.Owing to the short-range character of the interactions in rare-gas solids,only the nearest neighbour interactions were taken into account.The calculated phonon frequencies and elastic constants are in good agreement with the experimental values.The maximum error for phonon frenquencies is 3.3% and for the elastic constants is 7%.展开更多
The monolayer adsorbed Mo(001)surface is studied by the slab dynamical calculation by using the nearest and next nearest neighbour interactions.The phase diagram is obtained for light,heavy atom adsorbed and clean Mo(...The monolayer adsorbed Mo(001)surface is studied by the slab dynamical calculation by using the nearest and next nearest neighbour interactions.The phase diagram is obtained for light,heavy atom adsorbed and clean Mo(001)surface.The surface reconstruction induced by the interactions between adsorbed atoms is dicussed.展开更多
In the beetle Goliathus cacicus, male elytra show silky luster with iridescence while female ones appear lusterless white without iridescence to our perception. We revealed by structural characterizations and optical ...In the beetle Goliathus cacicus, male elytra show silky luster with iridescence while female ones appear lusterless white without iridescence to our perception. We revealed by structural characterizations and optical measurements that elytral coloration and luster of both male and female beetles stem from the tubular scales on the elytra, whose interior is filled with a random structure. Distinct differences between male and female scales reside in the cortex thickness and the filling fraction of the random structure, which are important factors in the determination of the sexual dichromatic luster and iridescence. In additional to reflection peaks in the visible range, spectral measurements indicate that both male and female elytra display also strong iridescent ultraviolet (UV) reflections. Scattering spectra show that both male and female elytra display UV luster, although it is absent for female ones in the visible range.展开更多
文摘A dynamical calculation of the state equation is presented to give a good prediction of the melting temperature for silicon which is much better than the molecular dynamics simulation result and agrees satisfactorily with the experimental value.
文摘Lattice dynamics of strained(Si)_(4)/(Ge)_(4) superlattice grown pseudomorphically on (001)-oriented Si_(1-x)Ge_(x)(0≤x≤1)substrate is investigated.In the present calculations,the effects of strain and substrate are discussed.
文摘Lattice dynamics of ^(36)Ar are investigated by Keating model.Owing to the short-range character of the interactions in rare-gas solids,only the nearest neighbour interactions were taken into account.The calculated phonon frequencies and elastic constants are in good agreement with the experimental values.The maximum error for phonon frenquencies is 3.3% and for the elastic constants is 7%.
文摘The monolayer adsorbed Mo(001)surface is studied by the slab dynamical calculation by using the nearest and next nearest neighbour interactions.The phase diagram is obtained for light,heavy atom adsorbed and clean Mo(001)surface.The surface reconstruction induced by the interactions between adsorbed atoms is dicussed.
基金supported by the National Basic Research Program of China (2011CB922004)supported by the National Natural Science Foundation of Chinathe Shanghai Science and Technology Commission
文摘In the beetle Goliathus cacicus, male elytra show silky luster with iridescence while female ones appear lusterless white without iridescence to our perception. We revealed by structural characterizations and optical measurements that elytral coloration and luster of both male and female beetles stem from the tubular scales on the elytra, whose interior is filled with a random structure. Distinct differences between male and female scales reside in the cortex thickness and the filling fraction of the random structure, which are important factors in the determination of the sexual dichromatic luster and iridescence. In additional to reflection peaks in the visible range, spectral measurements indicate that both male and female elytra display also strong iridescent ultraviolet (UV) reflections. Scattering spectra show that both male and female elytra display UV luster, although it is absent for female ones in the visible range.
