Elementary excitations in magnetically ordered systems with orbital degeneracy

Journal Article · Wed Sep 01 00:00:00 EDT 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.60.6584· OSTI ID:6270286

Joshi, A; Ma, M ^[1]; Mila, F ^[2]; Shi, D N ^[3]; Zhang, F C ^[1]

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1. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011 (United States)
2. Laboratoire de Physique Quantique, Universite Paul Sabatier, 31062 Toulouse Cedex (France)
3. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011 (United States) College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, Peoples Republic of (China)

The generalized Holstein-Primakoff transformation is used to develop a quantum flavor wave theory for spin systems with orbital degeneracy. Elementary excitations of ordered ground states consist of spin, orbital, and spin-orbital waves. Spin and spin-orbital waves couple to each other due to orbital anisotropy and Hund[close quote]s rule, resulting in modes observable by inelastic neutron scattering. In the SU(4) limit, flavor waves are dispersionless along one or more directions, and give rise to quantum fluctuations of reduced dimensionality. [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 6270286
• Journal Information: Physical Review, B: Condensed Matter, Vol. 60:9; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GROUND STATES
NEUTRON DIFFRACTION
QUANTUM MECHANICS
SOLIDS
SPIN WAVES
SU-4 GROUPS
COHERENT SCATTERING
DIFFRACTION
ENERGY LEVELS
LIE GROUPS
MECHANICS
SCATTERING
SU GROUPS
SYMMETRY GROUPS
665000* - Physics of Condensed Matter- (1992-)