def read_multicell_hamiltonian(input_file="hr_truncated.dat",
ncells=None,
win_file="wannier.win",
dim=2):
"""Reads an output hamiltonian from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
if ncells is None: # use all the hoppings
nmax = int(np.max([np.max(m[i]) for i in range(3)]))
ncells = [nmax, nmax, nmax]
# read the hamiltonian matrices
class Hopping:
pass # create empty class
tlist = []
def get_t(i, j, k):
norb = np.max([np.max(np.abs(m[3])), np.max(np.abs(m[4]))])
mo = np.matrix(np.zeros((norb, norb), dtype=np.complex))
found = False
for l in mt: # look into the file
if i == int(l[0]) and j == int(l[1]) and k == int(l[2]):
mo[int(l[3]) - 1,
int(l[4]) - 1] = l[5] + 1j * l[6] # store element
found = True # matrix has been found
if found: return mo # return the matrix
else: return None # return nothing if not found
for i in range(-ncells[0], ncells[0] + 1):
for j in range(-ncells[1], ncells[1] + 1):
for k in range(-ncells[2], ncells[2] + 1):
if (i, j, k) == (0, 0, 0): continue # skip intracell
matrix = get_t(i, j, k) # read the matrix
if matrix is None: continue
else: # store hopping
t = Hopping() # create hopping
t.dir = [i, j, k] # direction
t.m = get_t(i, j, k) # read the matrix
tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.is_multicell = True
h.orbitals = get_all_orbitals()
h.hopping = tlist # list of hoppings
h.has_spin = False # if not spin polarized
h.geometry = read_geometry(
input_file=win_file) # read the geometry of the system
h.geometry.center() # center the geometry
h.intra = get_t(0, 0, 0)
if len(h.geometry.r) != len(h.intra):
print("Dimensions do not match", len(g.r), len(h.intra))
print(h.geometry.r)
# raise # error if dimensions dont match
h.dimensionality = dim
return h
def read_multicell_hamiltonian(input_file="hr_truncated.dat",
ncells=None,win_file="wannier.win",
dim=2,skip_win=False):
"""Reads an output hamiltonian from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
if ncells is None: # use all the hoppings
nmax = int(np.max([np.max(m[i])for i in range(3)]))
ncells = [nmax,nmax,nmax]
# read the hamiltonian matrices
class Hopping: pass # create empty class
tlist = []
def get_t(i,j,k):
norb = np.max([np.max(np.abs(m[3])),np.max(np.abs(m[4]))])
norb = int(norb)
mo = np.matrix(np.zeros((norb,norb),dtype=np.complex))
found = False
for l in mt: # look into the file
if i==int(l[0]) and j==int(l[1]) and k==int(l[2]):
mo[int(l[3])-1,int(l[4])-1] = l[5] + 1j*l[6] # store element
found = True # matrix has been found
if found: return mo # return the matrix
else: return None # return nothing if not found
for i in range(-ncells[0],ncells[0]+1):
for j in range(-ncells[1],ncells[1]+1):
for k in range(-ncells[2],ncells[2]+1):
if (i,j,k)==(0,0,0): continue # skip intracell
matrix = get_t(i,j,k) # read the matrix
if matrix is None: continue
else: # store hopping
t = Hopping() # create hopping
t.dir = [i,j,k] # direction
t.m = get_t(i,j,k) # read the matrix
tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.is_multicell = True
if not skip_win: # do not skip wannier.win
h.orbitals = get_all_orbitals(input_file=win_file)
h.hopping = tlist # list of hoppings
h.has_spin = False # if not spin polarized
if not skip_win: # do not skip readin wannier.win
h.geometry = read_geometry(input_file=win_file) # read the geometry of the system
h.geometry.center() # center the geometry
h.intra = get_t(0,0,0)
if not skip_win: # do not skip reading wannier.win
if len(h.geometry.r)!=len(h.intra):
print("Dimensions do not match",len(g.r),len(h.intra))
print(h.geometry.r)
# raise # error if dimensions dont match
h.dimensionality = dim
return h
def read_hamiltonian(input_file="hr_truncated.dat", is_real=False):
"""Reads an output hamiltonian from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping:
pass # create empty class
tlist = []
def get_t(i, j, k):
norb = np.max([np.max(np.abs(m[3])), np.max(np.abs(m[4]))])
mo = np.matrix(np.zeros((norb, norb), dtype=np.complex))
for l in mt: # look into the file
if i == int(l[0]) and j == int(l[1]) and k == int(l[2]):
if is_real:
mo[int(l[3]) - 1, int(l[4]) - 1] = l[5] # store element
else:
mo[int(l[3]) - 1,
int(l[4]) - 1] = l[5] + 1j * l[6] # store element
return mo # return the matrix
# for i in range(-nmax,nmax):
# for j in range(-nmax,nmax):
# for k in range(-nmax,nmax):
# t = Hopping() # create hopping
# t.dir = [i,j,k] # direction
# t.m = get_t(i,j,k) # read the matrix
# tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.intra = get_t(0, 0, 0)
h.tx = get_t(1, 0, 0)
h.ty = get_t(0, 1, 0)
h.txy = get_t(1, 1, 0)
h.txmy = get_t(1, -1, 0)
h.has_spin = False # if not spin polarized
h.geometry = read_geometry() # read the geometry of the system
if len(h.geometry.r) != len(h.intra):
print("Dimensions do not match", len(g.r), len(h.intra))
print(h.geometry.r)
raise # error if dimensions dont match
return h
def add_frustrated_antiferromagnetism(h, m):
"""Add frustrated magnetism"""
import geometry
if h.geometry.sublattice_number == 3:
g = geometry.kagome_lattice()
elif h.geometry.sublattice_number == 4:
g = geometry.pyrochlore_lattice()
g.center()
else:
raise # not implemented
ms = []
for i in range(len(h.geometry.r)): # loop
ii = h.geometry.sublattice[i] # index of the sublattice
if callable(m):
ms.append(-g.r[int(ii)] * m(h.geometry.r[i])) # save this one
else:
ms.append(-g.r[int(ii)] * m) # save this one
h.add_magnetism(ms) # add the magnetization
def read_hamiltonian(input_file="hr_truncated.dat",is_real=False):
"""Reads an output hamiltonian from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping: pass # create empty class
tlist = []
def get_t(i,j,k):
norb = np.max([np.max(np.abs(m[3])),np.max(np.abs(m[4]))])
mo = np.matrix(np.zeros((norb,norb),dtype=np.complex))
for l in mt: # look into the file
if i==int(l[0]) and j==int(l[1]) and k==int(l[2]):
if is_real:
mo[int(l[3])-1,int(l[4])-1] = l[5] # store element
else:
mo[int(l[3])-1,int(l[4])-1] = l[5] + 1j*l[6] # store element
return mo # return the matrix
# for i in range(-nmax,nmax):
# for j in range(-nmax,nmax):
# for k in range(-nmax,nmax):
# t = Hopping() # create hopping
# t.dir = [i,j,k] # direction
# t.m = get_t(i,j,k) # read the matrix
# tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.intra = get_t(0,0,0)
h.tx = get_t(1,0,0)
h.ty = get_t(0,1,0)
h.txy = get_t(1,1,0)
h.txmy = get_t(1,-1,0)
h.has_spin = False # if not spin polarized
h.geometry = read_geometry() # read the geometry of the system
if len(h.geometry.r)!=len(h.intra):
print("Dimensions do not match",len(g.r),len(h.intra))
print(h.geometry.r)
raise # error if dimensions dont match
return h
def read_multicell_hamiltonian(input_file="hr_truncated.dat",ncells=[3,3,0]):
"""Reads an output hamiltonian from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping: pass # create empty class
tlist = []
def get_t(i,j,k):
norb = np.max([np.max(np.abs(m[3])),np.max(np.abs(m[4]))])
mo = np.matrix(np.zeros((norb,norb),dtype=np.complex))
for l in mt: # look into the file
if i==int(l[0]) and j==int(l[1]) and k==int(l[2]):
mo[int(l[3])-1,int(l[4])-1] = l[5] + 1j*l[6] # store element
return mo # return the matrix
for i in range(-ncells[0],ncells[0]+1):
for j in range(-ncells[1],ncells[1]+1):
for k in range(-ncells[2],ncells[2]+1):
if (i,j,k)==(0,0,0): continue # skip intracell
print i,j,k
t = Hopping() # create hopping
t.dir = [i,j,k] # direction
t.m = get_t(i,j,k) # read the matrix
tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.is_multicell = True
h.hopping = tlist # list of hoppings
h.has_spin = False # if not spin polarized
h.geometry = read_geometry() # read the geometry of the system
h.intra = get_t(0,0,0)
if len(h.geometry.r)!=len(h.intra):
print "Dimensions do not match",len(g.r),len(h.intra)
print h.geometry.r
raise # error if dimensions dont match
return h
import sys
import numpy as np
import os
sys.path.append("../../pygra")
import geometry
import sculpt
g = geometry.kagome_lattice()
#g = geometry.honeycomb_lattice()
g.has_sublattice = True
g.sublattice = [-1, 1, 0]
import ribbon
g = ribbon.bulk2ribbon(g, n=20)
h = g.get_hamiltonian()
ms = [] # zeeman fields
m1 = np.array([1., 0., 0.])
m2 = np.array([-.5, np.sqrt(3.) / 2., 0.])
m3 = np.array([-.5, -np.sqrt(3.) / 2., 0.])
mm = 3.0
for (r, s) in zip(g.r, g.sublattice):
if r[1] < 0.0:
if s == -1: ms.append(m1 * mm)
if s == 1: ms.append(m2 * mm)
if s == 0: ms.append(m3 * mm)
else: ms.append([0., 0., 0.])
# swave
def fs(r):
def read_supercell_hamiltonian(input_file="hr_truncated.dat",
is_real=False,
nsuper=1):
"""Reads an output hamiltonian for a supercell from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping:
pass # create empty class
tlist = []
def get_t(i, j, k):
norb = int(np.max([np.max(np.abs(m[3])), np.max(np.abs(m[4]))]))
mo = np.matrix(np.zeros((norb, norb), dtype=np.complex))
for l in mt: # look into the file
if i == int(l[0]) and j == int(l[1]) and k == int(l[2]):
if is_real:
mo[int(l[3]) - 1, int(l[4]) - 1] = l[5] # store element
else:
mo[int(l[3]) - 1,
int(l[4]) - 1] = l[5] + 1j * l[6] # store element
return mo # return the matrix
# this function will be called in a loop
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.has_spin = False
nstot = nsuper**2
intra = [[None for i in range(nstot)] for j in range(nstot)]
tx = [[None for i in range(nstot)] for j in range(nstot)]
ty = [[None for i in range(nstot)] for j in range(nstot)]
txy = [[None for i in range(nstot)] for j in range(nstot)]
txmy = [[None for i in range(nstot)] for j in range(nstot)]
from scipy.sparse import csc_matrix as csc
vecs = []
# create the identifacion vectors
inds = []
acu = 0
try: # read different supercells
nsuperx = nsuper[0]
nsupery = nsuper[1]
nsuperz = nsuper[2]
except: # read different supercells
nsuperx = nsuper
nsupery = nsuper
nsuperz = nsuper
for i in range(nsuperx): # loop over first replica
for j in range(nsupery): # loop over second replica
vecs.append(np.array([i, j])) # append vector
inds.append(acu)
acu += 1 # add one to the accumulator
for i in inds: # loop over first vector
for j in inds: # loop over second vector
v1 = vecs[i] # position of i esim cell
v2 = vecs[j] # position of j esim cell
dv = v2 - v1 # difference in vector
# get the different block elements
intra[i][j] = csc(get_t(dv[0], dv[1], 0))
tx[i][j] = csc(get_t(dv[0] + nsuper, dv[1], 0))
ty[i][j] = csc(get_t(dv[0], dv[1] + nsuper, 0))
txy[i][j] = csc(get_t(dv[0] + nsuper, dv[1] + nsuper, 0))
txmy[i][j] = csc(get_t(dv[0] + nsuper, dv[1] - nsuper, 0))
h.intra = bmat(intra).todense()
h.tx = bmat(tx).todense()
h.ty = bmat(ty).todense()
h.txy = bmat(txy).todense()
h.txmy = bmat(txmy).todense()
h.geometry = read_geometry() # read the geometry of the system
if nsuper > 1:
h.geometry = h.geometry.supercell(nsuper) # create supercell
if len(h.geometry.r) != len(h.intra):
print("Dimensions do not match", len(g.r), len(h.intra))
print(h.geometry.r)
# raise # error if dimensions dont match
# names of the orbitals
h.orbitals = get_all_orbitals() * nsuper**2
return h
def read_supercell_hamiltonian(input_file="hr_truncated.dat",is_real=False,nsuper=1):
"""Reads an output hamiltonian for a supercell from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping: pass # create empty class
tlist = []
def get_t(i,j,k):
norb = int(np.max([np.max(np.abs(m[3])),np.max(np.abs(m[4]))]))
mo = np.matrix(np.zeros((norb,norb),dtype=np.complex))
for l in mt: # look into the file
if i==int(l[0]) and j==int(l[1]) and k==int(l[2]):
if is_real:
mo[int(l[3])-1,int(l[4])-1] = l[5] # store element
else:
mo[int(l[3])-1,int(l[4])-1] = l[5] + 1j*l[6] # store element
return mo # return the matrix
# this function will be called in a loop
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.has_spin = False
nstot = nsuper**2
intra = [[None for i in range(nstot)] for j in range(nstot)]
tx = [[None for i in range(nstot)] for j in range(nstot)]
ty = [[None for i in range(nstot)] for j in range(nstot)]
txy = [[None for i in range(nstot)] for j in range(nstot)]
txmy = [[None for i in range(nstot)] for j in range(nstot)]
from scipy.sparse import csc_matrix as csc
vecs = []
# create the identifacion vectors
inds = []
acu = 0
try: # read different supercells
nsuperx = nsuper[0]
nsupery = nsuper[1]
nsuperz = nsuper[2]
except: # read different supercells
nsuperx = nsuper
nsupery = nsuper
nsuperz = nsuper
for i in range(nsuperx): # loop over first replica
for j in range(nsupery): # loop over second replica
vecs.append(np.array([i,j])) # append vector
inds.append(acu)
acu += 1 # add one to the accumulator
for i in inds: # loop over first vector
for j in inds: # loop over second vector
v1 = vecs[i] # position of i esim cell
v2 = vecs[j] # position of j esim cell
dv = v2 - v1 # difference in vector
# get the different block elements
intra[i][j] = csc(get_t(dv[0],dv[1],0))
tx[i][j] = csc(get_t(dv[0]+nsuper,dv[1],0))
ty[i][j] = csc(get_t(dv[0],dv[1]+nsuper,0))
txy[i][j] = csc(get_t(dv[0]+nsuper,dv[1]+nsuper,0))
txmy[i][j] = csc(get_t(dv[0]+nsuper,dv[1]-nsuper,0))
h.intra = bmat(intra).todense()
h.tx = bmat(tx).todense()
h.ty = bmat(ty).todense()
h.txy = bmat(txy).todense()
h.txmy = bmat(txmy).todense()
h.geometry = read_geometry() # read the geometry of the system
if nsuper>1:
h.geometry = h.geometry.supercell(nsuper) # create supercell
if len(h.geometry.r)!=len(h.intra):
print("Dimensions do not match",len(g.r),len(h.intra))
print(h.geometry.r)
# raise # error if dimensions dont match
# names of the orbitals
h.orbitals = get_all_orbitals()*nsuper**2
return h
def read_supercell_hamiltonian(input_file="hr_truncated.dat",
is_real=False,
nsuper=1):
"""Reads an output hamiltonian for a supercell from wannier"""
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
# read the hamiltonian matrices
class Hopping:
pass # create empty class
tlist = []
def get_t(i, j, k):
norb = np.max([np.max(np.abs(m[3])), np.max(np.abs(m[4]))])
mo = np.matrix(np.zeros((norb, norb), dtype=np.complex))
for l in mt: # look into the file
if i == int(l[0]) and j == int(l[1]) and k == int(l[2]):
if is_real:
mo[int(l[3]) - 1, int(l[4]) - 1] = l[5] # store element
else:
mo[int(l[3]) - 1,
int(l[4]) - 1] = l[5] + 1j * l[6] # store element
return mo # return the matrix
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
nstot = nsuper**2
intra = [[None for i in range(nstot)] for j in range(nstot)]
tx = [[None for i in range(nstot)] for j in range(nstot)]
ty = [[None for i in range(nstot)] for j in range(nstot)]
txy = [[None for i in range(nstot)] for j in range(nstot)]
txmy = [[None for i in range(nstot)] for j in range(nstot)]
from scipy.sparse import csc_matrix as csc
vecs = []
# create the identifacion vectors
inds = []
acu = 0
for i in range(nsuper): # loop over first replica
for j in range(nsuper): # loop over second replica
vecs.append(np.array([i, j])) # append vector
inds.append(acu)
acu += 1 # increase counter
for i in inds: # loop over first vector
for j in inds: # loop over second vector
v1 = vecs[i]
v2 = vecs[j]
dv = v1 - v2 # difference in vector
intra[i][j] = csc(get_t(dv[0], dv[1], 0))
tx[i][j] = csc(get_t(dv[0] + 1, dv[1], 0))
ty[i][j] = csc(get_t(dv[0], dv[1] + 1, 0))
txy[i][j] = csc(get_t(dv[0] + 1, dv[1] + 1, 0))
txmy[i][j] = csc(get_t(dv[0] + 1, dv[1] - 1, 0))
h.intra = bmat(intra).todense()
h.tx = bmat(tx).todense()
h.ty = bmat(tx).todense()
h.txy = bmat(txy).todense()
h.txmy = bmat(txmy).todense()
h.geometry = read_geometry() # read the geometry of the system
h.geometry = h.geometry.supercell(nsuper) # create supercell
if len(h.geometry.r) != len(h.intra):
print "Dimensions do not match", len(g.r), len(h.intra)
print h.geometry.r
raise # error if dimensions dont match
return h
def read_multicell_hamiltonian(input_file="hr_truncated.dat",
ncells=None,win_file="wannier.win",
dim=2,skip_win=False,path=None):
"""Reads an output hamiltonian from wannier"""
if path is not None:
inipath = os.getcwd() # current path
os.chdir(path) # go there
mt = np.genfromtxt(input_file) # get file
m = mt.transpose() # transpose matrix
if ncells is None: # use all the hoppings
nmax = int(np.max([np.max(m[i])for i in range(3)]))
ncells = [nmax,nmax,nmax]
# read the hamiltonian matrices
class Hopping: pass # create empty class
tlist = []
def get_t(i,j,k):
norb = np.max([np.max(np.abs(m[3])),np.max(np.abs(m[4]))])
norb = int(norb)
mo = np.matrix(np.zeros((norb,norb),dtype=np.complex))
found = False
for l in mt: # look into the file
if i==int(l[0]) and j==int(l[1]) and k==int(l[2]):
mo[int(l[3])-1,int(l[4])-1] = l[5] + 1j*l[6] # store element
found = True # matrix has been found
if found: return mo # return the matrix
else: return None # return nothing if not found
for i in range(-ncells[0],ncells[0]+1):
for j in range(-ncells[1],ncells[1]+1):
for k in range(-ncells[2],ncells[2]+1):
if (i,j,k)==(0,0,0): continue # skip intracell
matrix = get_t(i,j,k) # read the matrix
if matrix is None: continue
else: # store hopping
t = Hopping() # create hopping
t.dir = [i,j,k] # direction
t.m = get_t(i,j,k) # read the matrix
tlist.append(t) # store hopping
# the previous is not used yet...
g = geometry.kagome_lattice() # create geometry
h = g.get_hamiltonian() # build hamiltonian
h.is_multicell = True
if not skip_win: # do not skip wannier.win
h.orbitals = get_all_orbitals(input_file=win_file)
h.hopping = tlist # list of hoppings
h.has_spin = False # if not spin polarized
if not skip_win: # do not skip readin wannier.win
h.geometry = read_geometry(input_file=win_file) # read the geometry of the system
h.geometry.center() # center the geometry
h.intra = get_t(0,0,0)
if not skip_win: # do not skip reading wannier.win
if len(h.geometry.r)!=len(h.intra):
print("Dimensions do not match",len(g.r),len(h.intra))
print(h.geometry.r)
# raise # error if dimensions dont match
h.dimensionality = dim
if path is not None:
os.chdir(inipath) # go back
h.wannierpath = path # store
else: h.wannierpath = None
# now lets add the SOC method
def get_soc(self,name,soc):
if not self.has_spin: raise # only for spinful
self.intra = self.intra + generate_soc(name,soc,path=self.wannierpath)
import types
h.get_soc = types.MethodType(get_soc,h) # add the method
return h
