350
11 Surfaces
(a)
E =0
F
-0.1
-0.2
-0.3
-0.4
0
1
0
.
0
1
0
.
0
-
k (nm )
y
-1
k (nm )
x
-1
0
1
0
.
0
1
0
.
0
-
Bi Se
2
3
Energy (eV)
surface
states
Dirac
point
M
M
0
K
K
ARPES intensity (arb. units)
(b)
-0.01
0.01
0
k (nm )
y
-1
M
M
0
Intensity (arb. units)
Bi Se
2
3
Fig. 11.18 a Angle-resolved photoemission spectra from Bi 2 Se 3 (111) surface along two different k-space directions.
The Fermi level is at energy zero. The blue dashed line indicates the angular scan displayed in panel (b). b Spin-polarized
momentum distribution curve at a binding energy of −140 meV, measured along the k y -direction. Adapted from [1088]
11 Surfaces
(a)
E =0
F
-0.1
-0.2
-0.3
-0.4
0
1
0
.
0
1
0
.
0
-
k (nm )
y
-1
k (nm )
x
-1
0
1
0
.
0
1
0
.
0
-
Bi Se
2
3
Energy (eV)
surface
states
Dirac
point
M
M
0
K
K
ARPES intensity (arb. units)
(b)
-0.01
0.01
0
k (nm )
y
-1
M
M
0
Intensity (arb. units)
Bi Se
2
3
Fig. 11.18 a Angle-resolved photoemission spectra from Bi 2 Se 3 (111) surface along two different k-space directions.
The Fermi level is at energy zero. The blue dashed line indicates the angular scan displayed in panel (b). b Spin-polarized
momentum distribution curve at a binding energy of −140 meV, measured along the k y -direction. Adapted from [1088]