[1]Yugo S, Kanai T, Kimura T and Muto T 1991 Appl. Phys. Lett.
58 1036

[2] Gerber J, Sattel S, Jung K and Robertson J 1995 Diamond Relat.
Mater. 4 559

[3] Wolter S D, Borst T H, Vescan A and Kohn E 1996 Appl. Phys.
Lett. 68 3558

[4] Stoner B R, Ma G H, Wolter S D et al 1993 Diamond Relat.
Mater. 2 142

[5] Yan J-K, Chang L 2005 Diamond Relat. Mater. 14 1770

[6] Jiang X, Schiffmann K and Klages C P 1994 Phys. Rev. B
50 8402

[7] Lee S T, Peng H Y, Zhou X T, Wang N, Lee C S, Bello I and Lifshitz
Y 2000 Science 287 104

[8] Jiang N, Shinjo S, Inaoka T, Shintani Y, Ito T, Makita H, Hatta A
and Hiraki A 2001 J. Crystal Growth 224 111

[9] Steeds J W, Gilmore A, Wilson J A and Butler J E 1998 Diamond
Relat. Mater. 7 1437

[10] Iakoubovskii K and Adriaenssens G J 2000 Diamond Relat.
Mater. 9 1349

[11] Stammler M, Eisenbei\ss H, Ristein J, Neubauer J, G\"obbels M
and Ley L 2002 Diamond Relat. Mater. 11 504

[12] Kim D G, Seong T Y, Baik Y J, Kalceff M A S and Phillips M R 1999
Diamond Relat. Mater. 8 712

[13] Dannefaer S, Zhu W, Bretagnon T and Kerr D 1996 Phys.
Rev. B 53 1979

[14] Glover C, Newton M E, Martineau P, Twitchen D J and Baker J M 2003
Phys. Rev. Lett. 90 185507

[15] Choi I H, Barrat S, and Bauer-Grosse E 2003 Diamond Relat.
Mater. 12 361

[16] Hirsch P, Howie A, Nicholson R B, Pashley D W and Whelan M J 1977
Electron Microscopy of Thin Crystals (New York: Robert E. Krieger
Publishing CO., INC, Huntington, Second Revised Edition) p 427

[17] Hounsome L S, Jones R, Martineau P M, Fisher D, Shaw M J, Briddon
P R and \"Oberg S 2006 Phys. Rev. B 73 125203

[18] Feng D et al 2000 Metal Physics, Volume 1: Structures
and Defects ed Ge T S and Feng D (Beijing: Science Press) p 343 (in
Chinese)

[19] Mainwood A 1999 Phys. Status Solidi A 172 25

[20] Davies G 1977 Chemistry and Physics of Carbon Walker J P L
and Thrower P A (New York: Dekker) p 1

[21] Clark C D, Collins A T and Woods G S 1992 The Properties of
Natural and Synthetic Diamond Field J E (London: Academic) p 35