docstring fix

docstring fixes

src/docstrings.jl

@@ -2602,12 +2602,6 @@ interaction potentials, and `ρ` is the density matrix evaluated at specific che
 potential and temperature. Also `ν = ifelse(nambu, 0.5, 1.0)`, and `v_F(0) = v_H(0) = U`,
 where `U` is the onsite interaction.
 
-    zerofield
-
-An sigleton of type `ZeroField` that represents a zero-values field. It has the property
-that it returns zero no matter how it is indexed (`zerofield[inds...] = 0.0 * I`), so it is
-useful as a default value in a non-spatial model involving mean fields.
-
 ## Keywords
 
 - `potential`: charge-charge potential to use for both Hartree and Fock. Can be a number or a function of position. Default: `1
@@ -2631,7 +2625,7 @@ e.g. `ϕ[sites(2:3), sites(1)]`, see `OrbitalSliceArray` for details.
 # Examples
 
 ```jldoctest
-julia> model = hopping(I) - @onsite((i; phi = zerofield) --> phi[i]);
+julia> model = hopping(I) - @onsite((i; phi = zerofield) --> phi[i]);  # see zerofield docstring
 
 julia> g = LP.honeycomb() |> hamiltonian(model, orbitals = 2) |> supercell((1,-1)) |> greenfunction;
 
@@ -2660,5 +2654,19 @@ julia> phi1[sites(1), sites(2)] |> Quantica.chopsmall
  0.00307712+0.0im             ⋅
             ⋅      0.00307712+0.0im
 ```
+
+# See also
+    `zerofield`, `densitymatrix`, `OrbitalSliceMatrix`
 """
 meanfield
+
+"""
+        zerofield
+
+An sigleton of type `ZeroField` that represents a zero-values field. It has the property
+that it returns zero no matter how it is indexed (`zerofield[inds...] = 0.0 * I`), so it is
+useful as a default value in a non-spatial model involving mean fields. See `meanfield` for
+a usage example.
+
+"""
+zerofield