Hubbard Trimer with Spin-Orbit Coupling: Hartree-Fock Solutions, (Non)Collinearity, and Anisotropic Spin Hamiltonian.
Hubbard Trimer with Spin-Orbit Coupling: Hartree-Fock Solutions, (Non)Collinearity, and Anisotropic Spin Hamiltonian.
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具有自旋轨道耦合的 Hubbard 三聚体:Hartree-Fock 解、(非)共线性和各向异性自旋哈密顿量
DOI:
10.1021/acs.jpca.8b11959
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
M. Kaupp
中科院分区:
文献类型:
--
作者:
S. Ghassemi Tabrizi;A. V. Arbuznikov;M. Kaupp
We present unrestricted and generalized Hartree–Fock solutions (UHF and GHF, respectively) for the single-band Hubbard model of an equilateral triangle. Spin–orbit coupling (SOC) is treated self-consistently, and HF stability and properties of different spin structures are studied in detail. The GHF solution switches from noncollinear to collinear when crossing a high-symmetry point in parameter space (spanned by the amplitudes of spin-conserving and spin-dependent hopping, i.e., kinetic energy and SOC, respectively). The collinear GHF solution represents a simple example to disprove the notion that a collinear vector spin density in a Slater determinant necessarily entails a defined spin projection. Spin Hamiltonian parameters for the anisotropic interaction between three spin-1/2 centers are extracted from HF energies and subsequently compared to exact results from effective Hamiltonian theory. This provides an unambiguous benchmark for interpreting broken-symmetry mean-field solutions in terms of spin configurations and puts this semiclassical approach (frequently applied in broken-symmetry density functional theory) on a firmer basis.
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DOI:
10.1063/1.4824905
发表时间:
2013
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Yao Cui;Ireneusz W. Bulik;C. Jiménez;T. M. Henderson;G. Scuseria
通讯作者:
G. Scuseria
影响因子:
4.4
作者:
Kessler, Eva M. V.;Schmitt, Sebastian;van Wuellen, Christoph
通讯作者:
van Wuellen, Christoph
影响因子:
5.5
作者:
T. M. Henderson;C. Jiménez-Hoyos;G. Scuseria
通讯作者:
T. M. Henderson;C. Jiménez-Hoyos;G. Scuseria
影响因子:
5.5
作者:
A. Wodyński;M. Kaupp J.
通讯作者:
M. Kaupp J.
影响因子:
5.5
作者:
Michael Roemelt;V. Krewald;D. Pantazis
通讯作者:
D. Pantazis