Silicon crystals were shock compressed along the [100] and [111] orientations to stresses between 15.9 and . Transmitted wave profiles exhibited considerable orientation dependence for elastic and inelastic waves but very little orientation dependence for the phase transformation wave. Following the phase transformation wave, the silicon was compressed . This compression is significantly greater than the previously reported compressions for silicon shocked to similar stresses, and the present data are consistent with a completed phase transformation. The measured mechanical impedance of the transformed silicon matches the bulk impedance of the simple hexagonal phase of silicon reported in static high pressure studies.
REFERENCES
1.
A.
Mujica
, A.
Rubio
, A.
Munoz
, and R. J.
Needs
, Rev. Mod. Phys.
75
, 863
(2003
), and references therein.2.
M. N.
Pavlovskii
, Sov. Phys. Solid State
9
, 2514
(1968
).3.
W. H.
Gust
and E. B.
Royce
, J. Appl. Phys.
42
, 1897
(1971
).4.
T.
Goto
, T.
Sato
, and Y.
Syono
, Jpn. J. Appl. Phys., Part 2
21
, L369
(1982
).5.
L. M.
Barker
and R. E.
Hollenbach
, J. Appl. Phys.
43
, 4669
(1972
).6.
R. G.
McQueen
, S. P.
Marsh
, J. W.
Taylor
, J. N.
Fritz
, and W. J.
Carter
, in High Velocity Impact Phenomena
, edited by R.
Kinslow
(Academic
, New York
, 1970
), p. 293
.7.
H. J.
McSkimin
and P.
Andreatch
, J. Appl. Phys.
35
, 2161
(1964
);H. J.
McSkimin
and P.
Andreatch
, J. Appl. Phys.
35
, 3312
(1964
).8.
H.
Olijnyk
, S. K.
Sikka
, and W. B.
Holzapfel
, Phys. Lett.
103A
, 137
(1984
).9.
J. Z.
Hu
and I. L.
Spain
, Solid State Commun.
51
, 263
(1984
).10.
M. I.
McMahon
, R. J.
Nelmes
, N. G.
Wright
, and D. R.
Allan
, Phys. Rev. B
50
, 739
(1994
).11.
M.
Hanfland
, U.
Schwarz
, K.
Syassen
, and K.
Takemura
, Phys. Rev. Lett.
82
, 1197
(1999
).© 2007 American Institute of Physics.
2007
American Institute of Physics
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