Observation of structural anisotropy and the onset of liquidlike motion during the nonthermal melting of InSb.
The melting dynamics of laser excited InSb have been studied with femtosecond x-ray diffraction. These measurements observe the delayed onset of diffusive atomic motion, signaling the appearance of liquidlike dynamics. They also demonstrate that the root-mean-squared displacement in the [111] direction increases faster than in the [110] direction after the first 500 fs. This structural anisotropy indicates that the initially generated fluid differs significantly from the equilibrium liquid.
Gaffney
K J
KJ
Stanford Synchrotron Radiation Laboratory/SLAC, Menlo Park, California 94025, USA.
Lindenberg
A M
AM
Larsson
J
J
Sokolowski-Tinten
K
K
Blome
C
C
Synnergren
O
O
Sheppard
J
J
Caleman
C
C
MacPhee
A G
AG
Weinstein
D
D
Lowney
D P
DP
Allison
T
T
Matthews
T
T
Falcone
R W
RW
Cavalieri
A L
AL
Fritz
D M
DM
Lee
S H
SH
Bucksbaum
P H
PH
Reis
D A
DA
Rudati
J
J
Macrander
A T
AT
Fuoss
P H
PH
Kao
C C
CC
Siddons
D P
DP
Pahl
R
R
Moffat
K
K
Als-Nielsen
J
J
Duesterer
S
S
Ischebeck
R
R
Schlarb
H
H
Schulte-Schrepping
H
H
Schneider
J
J
von der Linde
D
D
Hignette
O
O
Sette
F
F
Chapman
H N
HN
Lee
R W
RW
Hansen
T N
TN
Wark
J S
JS
Bergh
M
M
Huldt
G
G
van der Spoel
D
D
Timneanu
N
N
Hajdu
J
J
Akre
R A
RA
Bong
E
E
Krejcik
P
P
Arthur
J
J
Brennan
S
S
Luening
K
K
Hastings
J B
JB