Development of multi-mode diabatic spin-orbit models at arbitrary order

Weike T, Eisfeld W (2016)
JOURNAL OF CHEMICAL PHYSICS 144(10): 104108.

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Abstract
The derivation of diabatic spin-orbit (SO) Hamiltonians is presented, which are expanded in terms of nuclear coordinates to arbitrary order including the treatment of multi-mode systems, having more than one mode of the same symmetry. The derivation is based on the microscopic Breit-Pauli SO operator and the consequent utilization of time reversal and spatial symmetry transformation properties of basis functions and coordinates. The method is demonstrated for a set of E-2 and (2)A(1) states in C-3v* (double group) symmetry, once for a 3D case of one a(1) and one e mode and once for a 9D case of three a(1) and three e coordinates. It is shown that the general structure of the diabatic SO Hamiltonian only depends on the basis states and is strictly imposed by time reversal symmetry. The resulting matrix can be expressed easily by a power series using six parametrized structure matrices as expansion coefficients multiplied by the associated monomials in terms of symmetrized coordinates. The explicit example presented here provides a full-dimensional diabatic SO model for methyl halide cations, which will be studied in the future. (C) 2016 AIP Publishing LLC.
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Weike T, Eisfeld W. Development of multi-mode diabatic spin-orbit models at arbitrary order. JOURNAL OF CHEMICAL PHYSICS. 2016;144(10): 104108.
Weike, T., & Eisfeld, W. (2016). Development of multi-mode diabatic spin-orbit models at arbitrary order. JOURNAL OF CHEMICAL PHYSICS, 144(10): 104108.
Weike, T., and Eisfeld, W. (2016). Development of multi-mode diabatic spin-orbit models at arbitrary order. JOURNAL OF CHEMICAL PHYSICS 144:104108.
Weike, T., & Eisfeld, W., 2016. Development of multi-mode diabatic spin-orbit models at arbitrary order. JOURNAL OF CHEMICAL PHYSICS, 144(10): 104108.
T. Weike and W. Eisfeld, “Development of multi-mode diabatic spin-orbit models at arbitrary order”, JOURNAL OF CHEMICAL PHYSICS, vol. 144, 2016, : 104108.
Weike, T., Eisfeld, W.: Development of multi-mode diabatic spin-orbit models at arbitrary order. JOURNAL OF CHEMICAL PHYSICS. 144, : 104108 (2016).
Weike, Thomas, and Eisfeld, Wolfgang. “Development of multi-mode diabatic spin-orbit models at arbitrary order”. JOURNAL OF CHEMICAL PHYSICS 144.10 (2016): 104108.
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