documented fermionic functions

src/models.jl

@@ -704,8 +704,20 @@ end
 """
     tightbinding_mpo(N, ϵd, chainparams1, chainparams2)
 
+    Generate MPO for a tight-binding chain of N fermionic sites with a single impurity site (fermionic as well) 
+    of energy ϵd at the center. The impurity is coupled to two leads, each described by a set of chain parameters.
+    The interactions are nearest-neighbour, with the first N/2-1 sites corresponding to the first lead,
+    the Nth site corresponding to the impurity, and the rest of the sites corresponding to the second
+    lead.
 
+    # Arguments
 
+    * `N::Int`: number of sites in the chain
+    * `ϵd::Real`: energy of the impurity site at the center, as Ed - μ, where μ is the chemical potential
+    * chainparams1::Array{Real,1}: chain parameters for the first lead
+    * chainparams2::Array{Real,1}: chain parameters for the second lead
+
+    The chain parameters are given in the standard form: `chainparams` ``=[[ϵ_0,ϵ_1,...],[t_0,t_1,...],c_0]``.
 
 
 """
@@ -816,10 +828,19 @@ end
 """
     interleaved_tightbinding_mpo(N, ϵd, chainparams1, chainparams2)
 
+    Generate MPO for a tight-binding chain of N fermionic sites with a single impurity site (fermionic as well)
+    of energy ϵd. The impurity is coupled to two leads, each described by a set of chain parameters. 
+    The interactions are next-nearest-neighbour, with the first site corresponding to the impurity, and the
+    two chains organised in an interleaved fashion.
 
+    # Arguments
 
+    * `N::Int`: number of sites in the chain
+    * `ϵd::Real`: energy of the impurity site at the first site, as Ed - μ, where μ is the chemical potential
+    * chainparams1::Array{Real,1}: chain parameters for the first lead
+    * chainparams2::Array{Real,1}: chain parameters for the second lead
 
-
+    The chain parameters are given in the standard form: `chainparams` ``=[[ϵ_0,ϵ_1,...],[t_0,t_1,...],c_0]``.
 """
 
 function interleaved_tightbinding_mpo(N, ϵd, chainparams1, chainparams2)