Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Owerre, Solomon A."'
Defects in frustrated antiferromagnetic spin chains are universally present in geometrically frustrated systems. We consider the defects of the one-dimensional, spin-$s$ XXZ chain with single-ion anisotropy on a periodic chain with $N$ sites that was
Externí odkaz:
http://arxiv.org/abs/2302.10789
Publikováno v:
Phys. Lett. A 378 (2014) 1407
We study the phase transition of the escape rate of exchange-coupled dimer of single-molecule magnets which are coupled either ferromagnetic ally or antiferromagnetically in a staggered magnetic field and an easy $z$-axis anisotropy. The Hamiltonian
Externí odkaz:
http://arxiv.org/abs/1311.4244
We show how to calculate the amplitude for quantum spin tunneling with a $z$ easy axis. In this case, using the usual spherical polar angles to parametrize spin coherent states, typically the tunnelling variable is the polar angle $\theta$, passing f
Externí odkaz:
http://arxiv.org/abs/1309.6615
Publikováno v:
Int. J. Mod. Phys. B 28, 1450008 (2013)
The Hamiltonian of a two-sublattice antiferromagnetic spins, with single (hard-axis) and double ion anisotropies described by $H=J \bold{\hat{S}}_{1}\cdot\bold{\hat{S}}_{2} - 2J_{z}\hat{S}_{1z}\hat{S}_{2z}+K(\hat{S}_{1z}^2 +\hat{S}_{2z}^2)$ is invest
Externí odkaz:
http://arxiv.org/abs/1308.4395
Autor:
Owerre, Solomon A., Paranjape, M. B.
Publikováno v:
Phys. Rev. B 88, 220403(R) (2013)
We study the simple Hamiltonian, $H=-K(S_{1z}^2 +S_{2z}^2)+ \lambda\vec S_1\cdot\vec S_2$, of two, large, coupled spins which are taken equal, each of total spin $s$ with $\lambda$ the exchange coupling constant. The exact ground state of this simple
Externí odkaz:
http://arxiv.org/abs/1304.3734
Autor:
Owerre, Solomon Akaraka
We present the spin wave theory of XY model with anisotropic nearest neighbour (NN) interactions $J(J^{\prime})$ along the $x(y)$ directions, next nearest (NNN) neighbour interaction $J_D$ and the ring exchange interaction $K$ on the square lattice.
Externí odkaz:
http://arxiv.org/abs/1303.6209
Autor:
Owerre, Solomon Akaraka
We present a review of suppression of tunneling rate (energy splitting) for half-odd-integer spins in ferromagnetic and antiferromagnetic particles. We also review the quenching of the tunneling rate in the presence of a magnetic field.
Comment:
Comment:
Externí odkaz:
http://arxiv.org/abs/1212.4904
Autor:
Owerre, Solomon Akaraka
Publikováno v:
Canadian Journal of Physics, 2013, 91(9): 722-727
Two coupled particles of identical masses but opposite charges, with a constant transverse external magnetic field and an external potential, interacting with a bath of harmonic oscillators are studied. We show that the problem cannot be mapped to a
Externí odkaz:
http://arxiv.org/abs/1209.2307
Autor:
Owerre, Solomon A.
This paper has been withdrawn because it overlaps with arXiv:1203.6583
Comment: This paper has been withdrawn because it overlaps with arXiv:1203.6583
Comment: This paper has been withdrawn because it overlaps with arXiv:1203.6583
Externí odkaz:
http://arxiv.org/abs/1208.5089
Autor:
Owerre, Solomon A.
Publikováno v:
Canadian Journal of Physics, 2013, 91(7): 542-547
We present the linear spin wave theory calculation of the superfluid phase of a hard-core boson $J$-$K$ model with nearest neighbour exchange $J$ and four-particle ring-exchange $K$ at half filling on the triangular lattice, as well as the phase diag
Externí odkaz:
http://arxiv.org/abs/1203.6583