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Magnetism and spin-free quantum chemistry

✍ Scribed by F. A. Matsen

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
210 KB
Volume
6
Category
Article
ISSN
0020-7608

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📜 SIMILAR VOLUMES

Spin-free quantum chemistry. XII. Coarse
Spin-free quantum chemistry. XII. Coarse structure magnetic theory
✍ F. A. Matsen; A. L. Ford 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 397 KB

## Abstract The coarse structure magnetic theory presented here is a reformulation of conventional magnetic theory which emphasizes the spin‐free (i.e., the coulombic) nature of the electron‐electron interaction. We show that the magnetic properties of a system for which fine and hyperfine structur

Spin-free quantum chemistry. XIII. Spin
Spin-free quantum chemistry. XIII. Spin waves
✍ F. A. Matsen; J. E. Suger; J. M. Picone 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 357 KB

## Abstract We have obtained the Bloch spin wave dispersion formula using the methods of spin‐free quantum chemistry. The spin‐free eigenvectors are waves in spin‐free space. This development makes the point that Bloch spin waves are dynamically spin‐free. The neutron diffraction transition moment

Spin-free quantum chemistry. XVI. Spin c
Spin-free quantum chemistry. XVI. Spin correlation
✍ F. A. Matsen; T. L. Welsher 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 700 KB

## Abstract We discuss the calculation of quasielastic critical neutron scattering for systems defined by a spin‐free Hamiltonian. The system dependent property which determines the critical scattering is the thermal average of a spin‐free operator called the general unpaired electron correlation o

Spin-Dependent operators in the spin-fre
Spin-Dependent operators in the spin-free quantum chemistry
✍ M. M. Mestechkin; G. T. Klimko 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 805 KB

## Abstract The two‐particle spatial density matrix components introduced by McWeeny are expressed in terms of the Fock coordinate wave function, which is constructed from an arbitrary function of __N__ spatial coordinates. The integral relations for these components are verified. The necessary mat

Spin-free quantum chemistry. XV Spin-onl
Spin-free quantum chemistry. XV Spin-only neutron diffraction
✍ F. A. Matsen; J. M. Picone; T. L. Welsher 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 475 KB

## Abstract The cross section for elastic neutron diffraction is analyzed for the spin‐only case, in which the orbital contributions to the magnetic moment density are negligible. For systems specified by spin‐free Hamiltonians, we show that the magnetic moment density is calculated from the unpair

Spin-Free quantum chemistry. XX. The alt
Spin-Free quantum chemistry. XX. The alternancy quantum number
✍ F. A. Matsen; T. L. Welsher 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 642 KB

## Abstract The assignment of the alternancy quantum number to the __N__‐electron states of neutral alternant hydrocarbons is discussed within the spin‐free unitary group formulation. Alternancy is defined with respect to both molecular graphs and molecular orbital eigenvalues. The properties of th