All Questions
4
questions
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votes
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answer
53
views
How to handle Dzyaloshinkii-Moriya imaginary terms in Heisenberg chain?
The DM interaction has three coordinate-specific terms when splitting it up. Two of these, the DM-x and DM-z terms, are imaginary when we transform them into series of raising and lowering operators. ...
- 11
1
vote
1
answer
280
views
Spin hamiltonian matrix representation
To preface, I'm an applied mathematician trying to parse the meaning of physics notation I've come across in a paper. My goal is to understand the setting in terms of matrices and vectors so that I ...
- 133
2
votes
1
answer
153
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Spin Glass Hamiltonian
Why do Edwards and Anderson use the hamiltonian
$$
H = \sum_{i,j} J_{ij} \mathbf{s}_i \cdot \mathbf{s}_j
$$
to describe the interactions in a spin glass?
Naively I would think that from the ...
- 754
2
votes
0
answers
83
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Spin Transition Energies
I am reading a paper:
http://arxiv.org/ftp/arxiv/papers/1305/1305.2445.pdf
On p. 22, the following Hamiltonian is given:
$$ H = \mu_B g \mathbf{B} \cdot \mathbf{S} + D(S_Z^2+\frac{1}{3}S(S+1)) + E(...
- 79