scholarly journals Spin-wave spectrum of a two-dimensional itinerant electron system: Analytic results for the incommensurate spiral phase in the strong-coupling limit

2001 ◽  
Vol 19 (3) ◽  
pp. 433-448 ◽  
Author(s):  
E. Arrigoni ◽  
G.C. Strinati
Keyword(s):  
Strong Coupling ◽  
Spin Wave ◽  
Wave Spectrum ◽  
Electron System ◽  
Strong Coupling Limit ◽  
Itinerant Electron ◽  
Two Dimensional ◽  
Spin Wave Spectrum ◽  
Spiral Phase

Spin wave spectrum of quasi-two-dimensional antiferromagnet NH3(CH2)2NH3MnCl4

1994 ◽  
Vol 194-196 ◽  
pp. 187-188 ◽  
Author(s):  
V.V. Eremenko ◽  
V.I. Fomin ◽  
V.S. Kurnosov
Keyword(s):  
Spin Wave ◽  
Wave Spectrum ◽  
Two Dimensional ◽  
Spin Wave Spectrum

SPIN WAVES AND THE STRONG COUPLING LIMIT IN POLYMERIC HUBBARD CHAINS

1995 ◽  
Vol 09 (13) ◽  
pp. 817-822 ◽  
Author(s):  
E. P. RAPOSO ◽  
M. D. COUTINHO-FILHO
Keyword(s):  
Strong Coupling ◽  
Wave Spectrum ◽  
Critical Value ◽  
Strong Coupling Limit ◽  
Hubbard Hamiltonian ◽  
Polymeric Chains ◽  
Heisenberg Hamiltonian ◽  
Ferrimagnetic Structure ◽  
Ferrimagnetic Ordering ◽  
Spin Wave Spectrum

We derive the strong-coupling limit of the Hubbard Hamiltonian in a class of polymeric chains displaying a ferrimagnetic structure. The derived Heisenberg Hamiltonian is used to calculate the spin-wave spectrum of the system. It is shown that there is a critical value for an external applied magnetic field above which the ferrimagnetic ordering becomes unstable.

scholarly journals Antiferromagnetism in two-dimensional quasicrystals

2009 ◽  
Vol 224 (1-2) ◽  
Author(s):  
Anuradha Jagannathan ◽  
Attila Szallas
Keyword(s):  
Spin Wave ◽  
Wave Spectrum ◽  
Two Dimensional ◽  
Translational Invariance ◽  
Spin Correlations ◽  
Magnetic Order Parameter ◽  
Quasiperiodic Structures ◽  
Penrose Tilings ◽  
Spin Wave Spectrum ◽  
Magnon Excitation

AbstractQuasiperiodic structures possess long range positional order, but are freed of constraints imposed by translational invariance. For spins interacting via Heisenberg couplings, one may expect therefore to find novel magnetic configurations in such structures. We have studied magnetic properties for simple two dimensional models, as a first step towards understanding experimentally studied magnetic quasicrystals such as the Zn–Mg–R(rare earth) compounds. We analyse properties of the antiferromagnetic groundstate and magnon excitation modes for bipartite tilings such as the octagonal and Penrose tilings. In the absence of frustration, one has an inhomogeneous Neel-ordered ground state, with local quantum fluctuations of the local staggered magnetic order parameter. We study the spin wave spectrum and wavefunctions of such antiferromagnets within the linear spin wave approximation. Some results for spin-spin correlations in these systems are discussed.

Effects of molecular adsorption on the spin-wave spectrum and magnon relaxation in two-dimensional Cr2Ge2Te6

2020 ◽  
Vol 22 (38) ◽  
pp. 22047-22054
Author(s):  
Ke Wang ◽  
Kai Ren ◽  
Yuan Cheng ◽  
Min Zhang ◽  
Hai Wang ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Spin Wave ◽  
Phonon Scattering ◽  
Wave Spectrum ◽  
Exchange Constant ◽  
Molecular Adsorption ◽  
Two Dimensional ◽  
Spin Wave Spectrum

Molecular adsorption has remarkable impacts on the exchange constant and magnon–phonon scattering of magnetic materials.

Forbidden Band Gaps in the Spin-Wave Spectrum of a Two-Dimensional Bicomponent Magnonic Crystal

2012 ◽  
Vol 109 (13) ◽  
Author(s):  
S. Tacchi ◽  
G. Duerr ◽  
J. W. Klos ◽  
M. Madami ◽  
S. Neusser ◽  
...  
Keyword(s):  
Spin Wave ◽  
Wave Spectrum ◽  
Band Gaps ◽  
Two Dimensional ◽  
Magnonic Crystal ◽  
Spin Wave Spectrum

Transverse spin waves in normal and superfluid 3He

1987 ◽  
Vol 65 (11) ◽  
pp. 1330-1335 ◽  
Author(s):  
D. Candela ◽  
D. O. Edwards ◽  
A. Heff ◽  
N. Masuhara ◽  
D. S. Sherrill ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Spin Wave ◽  
Fermi Liquid ◽  
Spin Waves ◽  
Wave Spectrum ◽  
Superfluid 3He ◽  
Transverse Spin ◽  
Published Data ◽  
Normal Liquid ◽  
Spin Wave Spectrum

After a brief review of experiment and theory for transverse spin waves in normal liquid 3He, we compare previously published data at 0, 6.3, and 12.3 bar (1 bar = 100 kPa) in superfluid 3He–B with a new version of the theory of Combescot for the spin-wave spectrum. The new theory includes the Fermi-liquid parameters [Formula: see text] and [Formula: see text] (as well as [Formula: see text], which was in the old version). The equations give an excellent fit to the data at 0 bar using values of [Formula: see text] and [Formula: see text] from the normal liquid, and [Formula: see text] from the B-phase susceptibility. At 6.3 bar, the fit is not quite so good, perhaps because of nontrivial strong-coupling effects. At 12.3 bar, the experimental uncertainties make the comparison inconclusive.

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