UHV LT STM Omicron.

1
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2
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• ????????? ????????? ????????? ? ?? ?????????
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• UHV LT STM Omicron.

3
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sample
tip
sample
tip
sample
tip
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????????????????? ???????????
R. Wiesendanger, Scanning Probe Microscopy and
Spectroscopy Methods and Applications,
Cambridge, UK, 1994
5
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• ????? ?????????? ??????
• (??? ???????? ?????)
• 2) ????? ??????????? ??????????? ????
• (? ???????? ??????)

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• 2) ????????????? ?????????
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?????????? ??????????? Si(111)7?7
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?????????? ??????????? Au(100)
T77 K, I6 nA, V1 mV, 10x10 nm
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T0
??????????? ???????????? ????????? ???????
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Sample
Tip
-????????? ????????? ?????????
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?????????????. ????????? ????????? ?????????
1)
2)
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Si(111), 7K
??????? ?????????????
Au(111)
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Current image tunneling spectroscopy (CITS)
????????? ?????? ????? ??????????? ?????????
(DFT)
CITS
DFT
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????????????? ???????????????? ?????????
T 0 0.2 Tc 0.4 Tc 0.6 Tc 0.8 Tc
?????????. ?????? ?????? ????????
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?????????? ??????????????? ???? ? NbSe2
- zero bias conductance
Vscan 100 mV I 0.5 nA Vosc 0.4 mV 400x400 nm
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??????????? ?????????? ????????? Omicron
??????? ???????? 10?-10 mbar ??????????? ???????
? ???? 300 - 2.5 ? ????????????????
??????? ????????? ???? 0-0,16?? ???????
???????????? ?? 2?2??? (LHe) 4?4 ??? (LN2)
??????????-??????? ?????????? ??? ???????
????????? ???????????? ???????? ?????? ?????
(Ar) ??? ?????? ????????
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????????? ?????????? ?????????. Si(111)7x7
Vgt0. ????????????? ????????? ???????
Vlt0. ??????????? ????????? ???????
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????????? ?????????? ?????????
?????????????? ???????? Bi2Te3.
I 60 pA, 5x5nm
200 mV
250 mV
300 mV
350 mV
NbSe2
3x3 nm, 200 pA, 50 mV
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??????? ?? ????????!