Results 241 to 250 of about 319,180 (281)

Carbon sp chains in diamond nanocavities

Physical Chemistry Chemical Physics, 2019
Structural, electronic and thermodynamic characterization of novel carbon allotropes mixing sp and sp3hybridizations, by means of computational methods.
Delodovici F., Choi D. S., Al Fahim M., Burchfield L. A., Manini N.   +4 more
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Geometric frustration in Ising diamond chains

Physica A: Statistical Mechanics and its Applications, 2008
Abstract Geometrically frustrated spin models with competing interaction parameters and the phase diagram of their corresponding T = 0 ground state energies are studied. The partition function defined by means of the transfer matrix method is calculated and the thermodynamical properties of the diamond Ising model are discussed.
J.S. Valverde, Onofre Rojas, S.M. de Souza   +2 more
openaire   +1 more source

Localized modes in an anharmonic diamond-structure chain

Physical Review B, 1998
In this paper we study localized vibrational modes in a chain of atoms with the same mass, but with two alternating force constants between nearest neighbors. This model simulates a row of atoms in the 〈111〉 direction of a diamond or silicon crystal. Cubic and quartic anharmonicity are included in the potential.
FRANCHINI, Anna, BORTOLANI, Virginio, Wallis RF   +2 more
openaire   +1 more source

Evidence for tilted chains on the diamond (111)-(2 × 1) surface

Surface Science, 1998
We present the first X-ray diffraction structure analysis of the reconstructed diamond (111) surface. The atomic geometry is obtained from the distribution of diffracted intensities along integer-order rods of Bragg scattering perpendicular to the surface.
Huisman, W.J., Lohmeier, M., van der Vegt, H.A., Peters, J.F., de Vries, S.A., Vlieg, E., Etgens, V.H., Derry, T.E., van der Veen, J.F.   +8 more
openaire   +3 more sources

Distorted diamond Ising-Hubbard chain

Low Temperature Physics, 2011
The ground state and thermodynamics of distorted Ising-Hubbard chains are studied with on-site Coulomb repulsion taken into account. A decoration-iteration transformation method is used to obtain exact results for the free energy, entropy, specific heat, magnetization of the Ising and Hubbard subsystems, and magnetic susceptibility.
openaire   +1 more source

Heat Capacity and Quasi-Chain Dynamics of Diamond-Like Structures

physica status solidi (b), 1968
AbstractThe heat capacities of a number of semiconducting substances (Si, GaAs, GaP, etc.) have been calculated on the basis of the quasi‐chain dynamics of covalent crystals [9]. It is shown that the characteristic frequencies v3 and v1 correspond to the respective dispersion frequencies at the points Γ(0, 0, 0), X(1, 0, 0), and L(0.5, 0.5, 0.5) of the
V. V. Tarassov, A. F. Demidenko
openaire   +1 more source

Isolation of Diamond Spin Chains in a Layered Halide Perovskite Heterostructure

Journal of the American Chemical Society
The halide perovskite heterostructure (CuCl4)2(MTPA)4Cu3Cl6 (Cu_Cu; MTPA = 3-(methylthio)-propylammonium) forms from solution as single crystals consisting of alternating layers of 2D CuII-Cl perovskite and 1D CuII-Cl diamond chain intergrowth. Using magnetometry, heat capacity, and electron paramagnetic resonance measurements, we interrogate the ...
Caravaggio D. Caniglia, Yuntian Li, Jiajia Wen, Magdalene T. Brueggemeyer, Young S. Lee, Edward I. Solomon, Ian R. Fisher, Hemamala I. Karunadasa   +7 more
openaire   +2 more sources