Energetics and dynamics of caged Zn4 in i-ScZn
Energetics and dynamics of caged Zn4 in i-ScZn
复制标题
i-ScZn 中笼状 Zn4 的能量学和动力学
DOI:
10.1080/14786435.2010.543650
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发表时间:
2011
影响因子:
1.6
通讯作者:
C. Henley
中科院分区:
文献类型:
--
作者:
M. Mihalkovič;C. Henley
In i-ScZn, like other quasicrystals of the i-CaCd class, the innermost shell of the icosahedral cluster is a Zn4 tetrahedron, which thus breaks the symmetry of the outer cluster shells. We investigate theoretically the dynamics of individual tetrahedra, using interatomic pair potentials, fitted from an ab initio database, and molecular dynamics (MD). This includes the formulation of an effective Hamiltonian written in terms of a rigid-body rotation representing the state of each tetrahedron. We characterize the minimum-energy orientations of a tetrahedron, as well as the paths of the transitions between minima (reorientations). The velocity autocorrelations were evaluated for the tetrahedral atoms in the MD dynamics; the corresponding spectral density S(ω) is fairly well fitted by a simplified model in which each atom hops in a double well.
DOI:
--
发表时间:
2002
期刊:
Jpn.J.Appl.Phys. 41
影响因子:
--
作者:
Y.Kaneko;T.Ishimasa
通讯作者:
T.Ishimasa
DOI:
--
发表时间:
2010
期刊:
Phys. Rev. B 82
影响因子:
--
作者:
T.Yamada;R.Tamura;Y.Muro;K.Motoya;M.Isobe;Y.Ueda.
通讯作者:
Y.Ueda.
DOI:
--
发表时间:
2006
期刊:
Physical Review Letters 96
影响因子:
--
作者:
綿貫 徹;青木勝敏;綿貫 徹;T.Watanuki
通讯作者:
T.Watanuki