4ß ì@G w µ@Fû PFéG /²8 #ú8 Fþ S4@ ö%Ê'2 · 2015-10-02 · cbm sto lao s4fþ 3q z _7Á...
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㜰ᇶ♏ᕤ ⱝᯘ⿱ຓ 㓟 㓟≀䞉᭷ᶵ≀䛻ᑐ䛩䜛⾲㠃/⏺㠃䛾 ᵓ㐀≀ᛶ◊✲ ⾲ ⾲㠃䞉⏺㠃䛾㔜せᛶ z ⾲㠃䜔⏺㠃---䝕䝞䜲䝇䛾ᶵ⬟Ⓨ⌧䛾⯙ z ᪂䛧䛔⌧㇟䛜⌧䜜䜛ሙᡤ ĺ䝞䝹䜽䛸➼䛻ᚤどⓗ䛺⌮ゎ䛜ᚲせ Ueno et al. Nature Nanotech. (2011)
Transcript of 4ß ì@G w µ@Fû PFéG /²8 #ú8 Fþ S4@ ö%Ê'2 · 2015-10-02 · cbm sto lao s4fþ 3q z _7Á...
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---
Ueno et al.Nature Nanotech.
(2011)
( )
pm
relaxed surf.
Ideal surf.
AFM, STM---CTR---
X
Elec
tron
dens
ity (/
Å3 )
X
-shape scattering (CTR scattering)
( ): CTR
c*Q-space
CTR --- X
sub---
0 2 4 6 8 10 12 14 160.0
2.0x106
4.0x106
L
(00L)
0 2 4 6 8 10 12 14 16100
102
104
106
108In
tens
ity (a
rb. u
nits
)
L
(00L)X
LAO/STOFilm sample
Nakagawa et al. Nature Materials(2006)
AO/SSS
cross-sectional HAADF-STEM image
TEM
Yamamoto, YW , PRL 107 036104 (2011)
CTR(LaNiO3/LaAlO3)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5101
102
103
104
105
106
Inte
nsity
L
(01L) LNO/LAO
bulk surface
Fitting parameterz for A, B, O1 and O2 (10 u.c.): 40La/Sr ratio, Al/Ti ratio : 16Occupancy of first 2 layers: 4Total number of parameters : 60
LaAlO3/SrTiO3n
100101102103104105106107108109
(00 )
Intensity
Exp. Fit
0 1 2 3 4 5100101102103104105106107108 (01 )
Intensity
(r.l.u.)
Exp. Fit
bulk surface
LaAlO3/SrTiO3p
0 1 2 3 4 5100101102103104105106107108109
Inte
nsity
(01 )
(r.l.u.)
Exp. Fit
100101102103104105106107108109
Inte
nsity
Exp. Fit(00 )
CBM
STO LAO-6 -4 -2 0 2 4 6
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
p-typeDisp
lace
men
t (Å)
z (unit cell)
-6 -4 -2 0 2 4 6-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
metal oxygen
ABO1O2
Disp
lace
men
t (Å)
z (unit cell)
n-type
(b)
(a) O1
O2 B
z E
E
CBM
STO LAO
n STO
p STO
n
STO
R.Yamamoto, Y.W. et al. PRL 107 036104 (2011).
R. Pentcheva and W.E. Pickett,PRL (2009). U. Schwingenschloegl and C. Schuster,
EPL (2009).
Z.S. Popovic et al., PRL (2008).
P in LAOTi moves to surf.
P in STO
LaAlO3/SrTiO3
P.R.Willmott et al. Phys. Rev. Lett. (2007).
s-like bands p-like bands d-like bands
TiO2SrO LaTiO3 1
••
PF 3A 3 SPring-8 BL13XU 1 2
[5]phenacenerubrene
Nature Commun. , 3A, (2014)
Ideal surf.
relaxed surf.
2 3 4 5 6 7 8100
101
102
103
104
105
106
107
Inte
nsity
L(r.l.u)
Expideal model
(00L)
Bulk phase Thin film phase
Surface structure of tetracene
Pentacene polymorphs
(GGA)
Surface structure of tetracene
Exp.
H.Morisaki, T.Koretsune, C.Hotta,J.Takeya, T.Kimura and Y.Wakabayashi,Nature Commun. 5 5400 (2014).
(Ishii et al. PRB 85, 245206(2012)ps )
CTR
(2 0 L) (9/4 1/4 L)
1.96 1.98 2.00 2.02 2.04-0.2
0.0
0.2
0.4
0.6
0.8
1.0 (9/4 1/4 L)
Norm
alize
d In
tens
ity
k
L=2 L=0.2
(2 0 0.2)OO=410Å
170K
Y.W. et al. Nature Materials 6, 972 (2007)
XPCS
Gustafson et al., Science 343, 758 (2014).
•PF•PF SGU " "•SPring-8 "
X
XPCS
