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xanes (bessy) xanes si l2,3 , ... – PowerPoint PPT presentation

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1
??????? ????????????? ?????????????? ????????? ?
?????????? ??????? ?? ?????????
?.?. ???????????, ?.?. ???????, ?.?. ???????
??????????? ??????????????? ???????????
??????? ftt_at_phys.vsu.ru www.phys.vsu.ru/ssp
2
?????? ????????????
  • ???????????? ????????????? ???????????
    ?????????????
  • USXES (ultrasoft X-ray emission spectroscopy)
  • - ??????????? ???-500
  • - ??????? ??????? 60 ??
  • ?????? ? ??????? ?????? 10-6????
  • - ???? 40 ???
  • ?????????? 0.2 ??

????????????? ??????? ?????? ????????? ????
?????????????? ?????????? XANES (X-ray
absorption near edge structure) - SRC,
University Wisconsin-Madison, Stoughton,
USA. - ????? MARK V - ??????? ??????? 5 ?? -
?????? ? ??????? ?????? 10-10???? - ???? 20
??? - ?????????? 0.1 ?? - BESSY II, Berlin,
Germany. - ????? RGBL - ??????? ??????? 5 ?? -
?????? ? ??????? ?????? 10-10???? - ???? 40
??? - ?????????? 0.1 ??
????????????? ????????? XRD (X-ray
diffraction) - ???????????? ????-4-07
3
??????? ????????????
????????? ???? ??? (??????? ?? ?????????) -
???????? ???????????????????? ??????? Si (100) -
???? ?????? ??????? SiO2 150 ?? - ????
??????????? ??????? ( 10 ??? 100 ??)
4
XANES (SRC)
??????????
XANES Si L2,3 ??????? ????????? ???????? (?90).
XANES Si L2,3 ??????? ???????????????? ???????
(?90-10).
5
XANES (SRC)
??????????
XANES Si L2,3 ??????? ??????? ???????
??????????? ???????, ??? ????????? ?????????
???? ?????????? ?.
XANES Si L2,3 ??????? ??????? ???????
??????????? ???????, ??? ????????? ?????????
???? ?????????? ?.
6
XANES (BESSY)
??????????
2LDn(n2 sin2q)1/2
XANES Si L2,3 ??????? ??????? ???????
??????????? ???????, ??? ????????? ?????????
???? ?????????? ?.
XANES Si L2,3 ??????? ??????? ???????
??????????? ???????, ??? ????????? ?????????
???? ?????????? ?.
7
XRD
??????????
a0.5395 ?? d0.1348 ??
a0.5430 ?? d0.1358 ??
?????????????? ????? (400) ?? ???????? ???
??????? (Dark sample) ? ??????????? (Gold
sample)
8
USXES
??????????
Si L2,3 USXES ??????? ??????????? ??????? ?
????????? ??????? ???????? ???????
DE(??) 8 2.2R(A)
R 2.3(A) (c-Si) R 2.6 (A) (strained Si)
L. Ley, R.A. Pollak, S.R. Kowalczyk, R.
McFeely and D. Shirley Phys. Rev B8, 641 (1973).
9
??????
1. ??????????????????? ??????? ???????????
?????????? ?????????? ???????? ???????????
??????? ? ?????????? ??????????? ?? ????????? ?
???????? ? ??????? ??????? ?? ????????? ??
0.0035 ?? ?? ????????? ? ??????????
??????????????????? ????????. 2. ????????
??????????? ????? ?????????? ?, ??? ???????
?????????? ???????????? ??????? ????????? ??
????? ???? ?????????? ? ??? ????????????
????????? ???????????? ?? ?????. 3. ??? ?????
????? ?????????? ?? ?? ??????? (?lt21º) ?
????????? ??? ? ????????? ??????? 83 ??
?????????? ????????????? ?? ? ??????? ???????,
?????????????? ??????? ???????? ???? ?????????? ?
(Si L2,3) 100 ??. 4. ?? ?????????? ?????
?????????????????? ?????????? ????????? ??????
??????? ???? ??????????? ???????. 5. ??
????????????? ??????????? ???????? ??????????
?????????? ??????? ??????? 0,3 ?.
?????? ?????? ????????? ??? ?????????
??????????? ??????? ????????? ??????? ?
??????-?????????????? ????? ?????????????
?????? ?? 2009-2013 ????
?????? ?????? ???????? ????????? ?? the
Synchrotron Radiation Center, University of
Wisconsin-Madison, ??? ????????? NSF ?????
No.DMR-0537588.
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