experimental observation of the quantum spin hall effect
TRANSCRIPT
y
z
x
40 60 80 100 120 140-100
-50
0
50
100
Ega
p / eV E1
H4
H3
H1
dQW / Å
E2
H2
HgTe QW
Ega
p/ m
eV
dQW / Å
M. König et al., Science 318, 766 (2007); M. König et al., JPSJ 77, 031007 (2008);A. Roth et al., Science 325, 294 (2009)
-2.0 -1.5 -1.0 -0.5 0.0102
103
104
105
106
G = 2 e2/h
Rxx /
Vg / V
45 Å 80 Å
et al., Science 325, 294 (2009)
Uexc
Vtip
z (nm)260
0 1 μm
x
y
G (e2/h)
1.0
2.02.2
G (arb.u.)
0
>0
++ +++ +
G (arb.u.)
0
>0
++ +++ +
-14.5 V -13.0 V
G (arb.u.)
0
>0
++ +++ +
++ +
G (e
2 /h)
b
y (μm)
Vtip-10 V +10 V
y
0
8 μm
