Information of spin space group $I\ce{^{\text{-}1}{m}}\ce{^{1}{m}}\ce{^{\text{-}1}{2}}\ce{^{\infty m}{1}}$ ( nSSG:8.44.1.1 )

General Positions

The continuously infinite group ^∞1 is omitted.

Coordinates	Seitz symbol
a, b, c | x, y, z	{ 1 ‖ 1 | 0 }
a, -b, c | x, y, z	{ 1 ‖ m010 | 0 }
-a, -b, c | -x, -y, -z	{ -1 ‖ 2001 | 0 }
-a, b, c | -x, -y, -z	{ -1 ‖ m100 | 0 }
a+1/2, b+1/2, c+1/2 | x, y, z	{ 1 ‖ 1 | 1/2 1/2 1/2 }
a+1/2, -b+1/2, c+1/2 | x, y, z	{ 1 ‖ m010 | 1/2 1/2 1/2 }
-a+1/2, -b+1/2, c+1/2 | -x, -y, -z	{ -1 ‖ 2001 | 1/2 1/2 1/2 }
-a+1/2, b+1/2, c+1/2 | -x, -y, -z	{ -1 ‖ m100 | 1/2 1/2 1/2 }
a, b, c | -x, y, z	{ m ‖ 1 | 0 }
a, -b, c | -x, y, z	{ m ‖ m010 | 0 }
-a, -b, c | x, -y, -z	{ 2 ‖ 2001 | 0 }
-a, b, c | x, -y, -z	{ 2 ‖ m100 | 0 }
a+1/2, b+1/2, c+1/2 | -x, y, z	{ m ‖ 1 | 1/2 1/2 1/2 }
a+1/2, -b+1/2, c+1/2 | -x, y, z	{ m ‖ m010 | 1/2 1/2 1/2 }
-a+1/2, -b+1/2, c+1/2 | x, -y, -z	{ 2 ‖ 2001 | 1/2 1/2 1/2 }
-a+1/2, b+1/2, c+1/2 | x, -y, -z	{ 2 ‖ m100 | 1/2 1/2 1/2 }

Wyckoff Positions

WP	Site symmetry	Representative
2a	$\ce{^{-1}{m}}\ce{^{1}{m}}\ce{^{-1}{2}}\ce{^{\infty m}{1}} $	(0,0,c | 0,0,0)
2b	$\ce{^{-1}{m}}\ce{^{1}{m}}\ce{^{-1}{2}}\ce{^{\infty m}{1}} $	(0,1/2,c | 0,0,0)
4c	$.\ce{^{1}{m}}.\ce{^{\infty m}{1}} $	(a,0,c | 0,0,z)
4d	$\ce{^{-1}{m}}..\ce{^{\infty m}{1}} $	(0,b,c | 0,0,0)
8e	$\ce{^{1}{1}}\ce{^{\infty m}{1}} $	(a,b,c | 0,0,z)

Spin Brillouin Zone & k-little co-groups

Wavevector-k	Little co-group
Γ:(0,0,0)	$\ce{^{-1}{m}}\ce{^{1}{m}}\ce{^{-1}{2}}\ce{^{\infty m}{1}} $
X:(1,1,1)	$\ce{^{-1}{m}}\ce{^{1}{m}}\ce{^{-1}{2}}\ce{^{\infty m}{1}} $
R:(1/2,0,1/2)	$\ce{^{1}{m}}\ce{^{\infty m}{1}} $
S:(0,1/2,1/2)	$\ce{^{-1}{m}}\ce{^{\infty m}{1}} $
T:(1/2,1/2,0)	$\ce{^{-1}{2}}\ce{^{\infty m}{1}} $
W:(1/2,1/2,1/2)	$\ce{^{-1}{m}}\ce{^{m}{m}}\ce{^{2}{2}}\ce{^{\infty}{1}} $
Δ:(0,v,0)	$ \ce{^{2}{m}}\ce{^{m}{m}}\ce{^{-1}{2}}\ce{^{\infty}{1}} $
Λ:(0,0,w)	$\ce{^{2}{m}}\ce{^{1}{m}}\ce{^{2}{2}}\ce{^{\infty}{1}} $
Σ:(u,0,0)	$\ce{^{-1}{m}}\ce{^{1}{m}}\ce{^{-1}{2}}\ce{^{\infty}{1}} $
A:(0,v,w)	$\ce{^{2}{m}}\ce{^{\infty}{1}} $
B:(u,0,w)	$\ce{^{1}{m}}\ce{^{\infty}{1}} $
C:(u,v,0)	$\ce{^{-1}{2}}\ce{^{\infty}{1}} $
D:(u,1/2,1/2)	$\ce{^{-1}{m}}\ce{^{\infty}{1}} $
P:(1/2,1/2,w)	$\ce{^{2}{2}}\ce{^{\infty}{1}} $
Q:(1/2,v,1/2)	$\ce{^{m}{m}}\ce{^{\infty}{1}} $
GP:(u,v,w)	$\ce{^{1}{1}}\ce{^{\infty}{1}} $

Spin Brillouin Zone

Band Representations (Magnon)

4c

k-vector	k-vector-G↑	A'↑G(2)
Γ:(0,0,0)	Γ:(0,0,0)	$Γ_{1}^{S}(2) $
R:(-1/2,1,1/2)	M:(0,1,1/2)	$2 (R)M_{1}^{S}(1)$	Spin Splitting
S:(0,1/2,1/2)	L:(1/2,1/2,1/2)	$(S)L_{1}^{S}(2) $
T:(1/2,1/2,0)	V:(1/2,1/2,0)	$(T)V_{1}^{S}(2) $
W:(-1/2,3/2,1/2)	U:(0,3/2,1/2)	$(W)U_{1}^{S}(2) $
X:(0,1,0)	Y:(0,1,0)	$(X)Y_{1}^{S}(2) $
D:(u,1/2,1/2)	GP:(1/2+u,1/2,1/2)	$(D)GP_{1}^{S}(2) $
Δ:(0,v,0)	Λ:(0,v,0)	$(Δ)Λ_{1}^{S}(2) $
Λ:(0,0,w)	B:(w,0,w)	$(Λ)B_{1}^{S}(2) $
P:(1/2,1/2,w)	GP:(1/2+w,1/2,w)	$(P)GP_{1}^{S}(2) $
Q:(-1/2,1+v,1/2)	U:(0,1+v,1/2)	$2(Q)U_{1}^{S}(1)$	Spin Splitting
Σ:(u,0,0)	B:(u,0,0)	$(Σ)B_{1}^{S}(2) $
A:(0,v,w)	GP:(w,v,w)	$(A)GP_{1}^{S}(2) $
B:(u,0,w)	B:(u+w,0,w)	$2B_{1}^{S}(1)$	Spin Splitting
C:(u,v,0)	GP:(u,v,0)	$(C)GP_{1}^{S}(2) $
GP:(u,v,w)	GP:(u+w,v,w)	$2GP_{1}^{S}(1)$	Spin Splitting

8e

k-vector	k-vector-G↑	A↑G(4)
Γ:(0,0,0)	Γ:(0,0,0)	$Γ_{1}^{S}(2)⊕Γ_{2}^{S}(2) $
R:(-1/2,1,1/2)	M:(0,1,1/2)	$2 (R)M_{1}^{S}(1)⊕2 (R)M_{2}^{S}(1)$	Spin Splitting
S:(0,1/2,1/2)	L:(1/2,1/2,1/2)	$2(S)L_{1}^{S}(2) $
T:(1/2,1/2,0)	V:(1/2,1/2,0)	$2(T)V_{1}^{S}(2) $
W:(-1/2,3/2,1/2)	U:(0,3/2,1/2)	$2(W)U_{1}^{S}(2) $
X:(0,1,0)	Y:(0,1,0)	$(X)Y_{1}^{S}(2)⊕(X)Y_{2}^{S}(2) $
D:(u,1/2,1/2)	GP:(1/2+u,1/2,1/2)	$2(D)GP_{1}^{S}(2) $
Δ:(0,v,0)	Λ:(0,v,0)	$2(Δ)Λ_{1}^{S}(2) $
Λ:(0,0,w)	B:(w,0,w)	$(Λ)B_{1}^{S}(2)⊕(Λ)B_{2}^{S}(2) $
P:(1/2,1/2,w)	GP:(1/2+w,1/2,w)	$2(P)GP_{1}^{S}(2) $
Q:(-1/2,1+v,1/2)	U:(0,1+v,1/2)	$4(Q)U_{1}^{S}(1)$	Spin Splitting
Σ:(u,0,0)	B:(u,0,0)	$(Σ)B_{1}^{S}(2)⊕(Σ)B_{2}^{S}(2) $
A:(0,v,w)	GP:(w,v,w)	$2(A)GP_{1}^{S}(2) $
B:(u,0,w)	B:(u+w,0,w)	$2B_{1}^{S}(1)⊕2B_{2}^{S}(1)$	Spin Splitting
C:(u,v,0)	GP:(u,v,0)	$2(C)GP_{1}^{S}(2) $
GP:(u,v,w)	GP:(u+w,v,w)	$4GP_{1}^{S}(1)$	Spin Splitting