Hamiltonians and order parameters for crystals of orientable molecules
Hamiltonians and order parameters for crystals of orientable molecules
复制标题
可取向分子晶体的哈密顿量和有序参数
DOI:
10.1103/physrevb.98.094105
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发表时间:
2018
影响因子:
3.7
通讯作者:
Van der Ven, Anton
中科院分区:
文献类型:
--
作者:
Thomas, John C.;Bechtel, Jonathon S.;Van der Ven, Anton
Many modern functional materials exhibit microscopic degrees of freedom that are difficult to describe mathematically or do not conform to conventional models in solid state physics. In this paper, we consider crystals containing orientable molecular species, which encompass the class of promising photovoltaic materials. Abstracting these materials as crystals of orientable rigid rotors, we develop an effective Hamiltonian that expresses the crystal potential energy in terms of collective orientations of interacting rigid rotors. The approach is motivated by the cluster expansion framework from alloy theory and is appropriate for describing both chiral and achiral molecules. This framework utilizes a quaternion parametrization of molecular orientation and makes full use of the symmetry both of the rotors and of the crystal in order to constrain the functional form of the final Hamiltonian expression. The resulting Hamiltonian is compact, systematically improvable, and is suitable for Monte Carlo or molecular dynamics simulation. We apply this formalism toand report symmetry-adapted basis functions that can be used to construct order parameters or Hamiltonians that describe orientational correlation of methylammonium ions in hybrid organic-inorganic halide perovskite materials.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
J. Avery
通讯作者:
J. Avery
DOI:
10.1016/j.matcom.2009.08.008
发表时间:
2010-03
期刊:
Math. Comput. Simul.
影响因子:
--
作者:
Anton Van der Ven;J. Thomas;Q. Xu;J. Bhattacharya
通讯作者:
Anton Van der Ven;J. Thomas;Q. Xu;J. Bhattacharya
影响因子:
41.2
作者:
Jeon, Nam Joong;Noh, Jun Hong;Seok, Sang Il
通讯作者:
Seok, Sang Il
影响因子:
38.3
作者:
Tan, Zhi-Kuang;Moghaddam, Reza Saberi;Friend, Richard H.
通讯作者:
Friend, Richard H.
影响因子:
5.3
作者:
John C. Thomas;Anton Van der Ven
通讯作者:
John C. Thomas;Anton Van der Ven