Adiabatic Dynamics of Local Spin Moments in Itinerant Magnets

Autor:	G. M. Stocks, Qian Niu, Wu-Ming Liu, Leonard Kleinman, Xindong Wang, D. M. C. Nicholson
Rok vydání:	1999
Předmět:	Magnonics Physics Condensed matter physics Spin polarization Geometric phase Spin wave General Physics and Astronomy Equations of motion Condensed Matter::Strongly Correlated Electrons Adiabatic process Ground state Spin-½
Zdroj:	Physical Review Letters. 83:207-210
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.83.207
Popis:	Using the adiabatic approximation, we derive the equations of motion for local spin moments which are valid for itinerant as well as tight-binding spins. Material parameters in the equations of motion can be obtained using standard density functional methods, because they depend only on the energy and Berry phase of the constrained ground state of frozen spin configurations. For the calculation of spin waves in a collinear magnet, it is sufficient to know the quadratic forms of total energy and spin component along the symmetry axis as functions of the spin deviations from the ground state configuration. {copyright} {ital 1999} {ital The American Physical Society}
Databáze:	OpenAIRE
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