metropolis-type evolution rules for surface growth models with the global constraints
DESCRIPTION
Metropolis-type evolution rules for surface growth models with the global constraints on one and two dimensional substrates. Yup Kim, H. B. Heo, S. Y. Yoon KHU. 1. 1. Motivation. In equilibrium state, Normal restricted solid-on-solid model : Edward-Wilkinson universality class - PowerPoint PPT PresentationTRANSCRIPT
Metropolis-type evolution rules for surface growth models with the global constraints
on one and two dimensional substrates
Yup Kim, H. B. Heo, S. Y. Yoon
KHU
1. Motivation
In equilibrium state,
Normal restricted solid-on-solid model: Edward-Wilkinson universality class
Two-particle correlated surface growth- Yup Kim, T. S. Kim and H. Park, PRE 66, 046123 (2002)
Dimer-type surface growth- J. D. Noh, H. Park, D. Kim and M. den Nijs, PRE 64, 046131 (2001) - J. D. Noh, H. Park and M. den Nijs, PRL 84, 3891 (2000)
Self-flattening surface growth-Yup Kim, S. Y. Yoon and H. Park, PRE(RC) 66, 040602(R) (2002)
1
1. Normal RSOS (z =1)
2. Two-particle correlated (dimer-type) growth (z = -1)
)1(}{
21
max
min
h
RSOS
n
h
h
hh
zZ
2
3
1
nh=even number,
Even-Visiting Random Walk (1D)
0)}({ RSOShP
Z
z
hP
h
hh
n
RSOS
h
max
min
)1(
)}({21
RSOSh
RSOS ZZ
hP}{
1,1
)}({Normal Random Walk (1D)
4
1,
2
11
RWz
Partition function,
(EW)
)( zLt Steady state or Saturation regime ,
nh : the number of columns with height h
3. Self-flattening surface growth (z = 0)
3
)(
}{ 2
1cH
h RSOSr
Z
)1)(( minmax hhcH 3
1
Self-attracting random walk (1D)
Phase diagram (1D)
z = 0 z = 1z =-1Normal
Random WalkEven-Visiting Random Walk
2
1
3
1
3
1 ??
Self-attracting Random Walk
?z
Phase diagram (2D)
z = 0 z = 1z =-1Normal
Random WalkEven-Visiting Random Walk
?
Self-attracting Random Walk
z
LK
WG
ln2
12
Choose a column randomly.x
2. Generalized Model
4
,1)()( xhxh
1)()( xhxh
Acceptance parameter P is defined by
)})(({
)})('({
rhw
rhwP
Decide the deposition (the evaporation) attempt with probability p (1-p)
Calculate for the new configuration from the decided deposition(evaporation) process
)})('({ rhw
)}('{ rh
)1(2
1)})(({
max
min
hnh
hh
zrhw
( nh : the number of sites which have the same height h ) r
Evaluate the weight in a given height configuration )}('{ rh
( a primitive lattice vector in the i – th direction ) ie
Any new configuration is rejected if it would result in violating the RSOS contraint
1)ˆ()( ierhrh
5
n+2 = 1n+1 = 3n 0 = 2n-1 = 2n-2 = 2
wn´ +2 = 2
n´ +1 = 2
n´ 0 = 2
n´ -1 = 2
n´ -2 = 2
w´
hmax
0)( ixh
hmin
p =1/2L = 10z = 0.5
P R
If P 1 , then new configuration is accepted unconditionally. If P < 1 , then new configuration is accepted only when P R.where R is generated random number 0< R < 1 (Metropolis algorithm)
9259.0)5.01()5.01(
)5.01()5.01(
213
21
2212
21
)})(({
)})('({
rhw
rhwP
0.00 0.01 0.02 0.030.2
0.3
0.4
0.5
z = - 1
z = 1.5 z = 0.5 z = 0
z = - 0.5
eff
1/L
3. Simulation Results
6
Equilibrium model (1D, p=1/2)
zL
tfLW
z
z
Ltt
LtL
,
,
LL
tLWtLWLeff ln)2ln(
),(ln),2(ln)(
z
0.00 0.01 0.02 0.030.2
0.3
0.4
0.5
1/3
z=0.9
z=1.1
eff
1/L
0 1 2 3 4 5
-0.5
0.0
0.5
1.0
=0.22
z=-0.5
z=0
z=0.5
z=0.9
z=1.1
z=1.5
ln W
ln t
7
0.22
0.33
1.1
0.22
0.33
0.9
0.19 0.22 0.22 0.22 1/4 0.22
0.33 0.34 0.33 0.331/2
0.33 (L)
-1-0.500.511.5z
2.5 3.0 3.5 4.0 4.5 5.00.4
0.5
0.6
0.7
0.8
0.9
1.0
z = -1
z = -0.5
z = 0
z = 0.5
z = 1
z = 1.5
W2
ln L
7
WzG L
tLg
KtLW ln
2
1),(2
z
G
z
G
LtLK
LttK
,ln2
1
,ln2
1
Equilibrium model (2D, p=1/2)
z -1 -0.5 0 0.5 1 1.5
a 0.176 0.176 0.176 0.175 0.176 0.179
176.02
1a
KG
7
Scaling Collapse to in 2D equilibrium state.
WzG L
tLg
KtLW ln
2
1),(2
176.02
1a
KG , Z = 2.5
Phase diagram in equilibrium (1D)
z = 0
z = 1z =-1
Normal RSOS
2-particle corr. growth
2
1
3
1
3
1
Self-flattening surface growth
3
1
3
1
3
1
-1/2 1/2 3/2
z = 0.9 z = 1.1
3
1
3
1
7
z = 0 z = 1z =-1Normal
Random WalkEven-Visiting Random Walk
Self-attracting Random Walk
z
Phase diagram in equilibrium (2D)
LK
WG
ln2
12
176.0
2
1a
KG
z = -0.5 z = 0.5 z = 1.5
9
Growing (eroding) phase (1D, p=1(0) )
p (L)
1.5 0.52
0.5 0.51
0 0.49
zL
tfLW
z
z
Ltt
LtL
,
,
z 0
)1,31,2
1( zz
: Normal RSOS model (Kardar-Parisi-Zhang universality class)
,5.0 ,33.0 5.1z
Normal RSOS Model (KPZ)
10
z 0
11
z 0
z=-0.5 p=1 L=1280.00 0.01 0.02 0.03
0.5
1.0
1.5
2.0
z = -0.1 z = -0.5
z = -1
eff
1/L
12
4. Conclusion
Equilibrium model (1D, p=1/2)
0 1-1
Normal RSOS
(Normal RW)
2-particle corr. growth
(EVRW)
2
1
3
1
3
1
Self-flattening surface growth
(SATW)
3
1
3
1
3
1
3/21/2-1/2
Growing (eroding) phase (1D, p = 1(0) )
1. z 0 : Normal RSOS model (KPZ universality class)
2. z 0 : Groove phase ( = 1)
Phase transition at z=0 (?)
z0.9 1.1
3
1
3
1
Scaling Collapse to in 1D equilibrium state. ( = 1/3 , z = 1.5)
zL
tfLW
12-1
7
0.175
0.162Dimer
0.175Monomer
Slope aModel
Extremal 0.174
2-site
Monomer & Extremal & Dimer & 2-site