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Experimental observation of the Quantum Spin Hall effect

Date post: 18-Dec-2021
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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


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