radtools.ExchangeHamiltonian.remove_bond

method

ExchangeHamiltonian.remove_bond(atom1: Atom, atom2: Atom, R)

Remove one bond from the Hamiltonian.

More straightforward syntax is advised:

>>> import radtools as rad
>>> Cr = rad.Atom("Cr")
>>> J = rad.ExchangeParameter(iso=1)
>>> model = rad.ExchangeHamiltonian(rad.Crystal())
>>> model[Cr, Cr, (1,0,0)] = J
>>> (Cr, Cr, (1,0,0)) in model
True
>>> del model[Cr, Cr, (1,0,0)]
>>> (Cr, Cr, (1,0,0)) in model
False

It is the same as

>>> import radtools as rad
>>> Cr = rad.Atom("Cr")
>>> J = rad.ExchangeParameter(iso=1)
>>> model = rad.ExchangeHamiltonian(rad.Crystal())
>>> model[Cr, Cr, (1,0,0)] = J
>>> (Cr, Cr, (1,0,0)) in model
True
>>> model.remove_bond(Cr, Cr, (1,0,0))
>>> (Cr, Cr, (1,0,0)) in model
False

Parameters:

atom1py:class:.Atom

Atom object in (0, 0, 0) unit cell.

atom2py:class:.Atom

Atom object in R unit cell.

Rtuple of ints

Radius vector of the unit cell for atom2 (i,j,k).