[1]F.J. Himpsel, J.E. Ortega, G.J. Mankey and R.F. Willis, Adv Phys 47(1998)511.
[2]P. Gambardella, M. Blanc, L. Bürgi, K. Kuhnke and K.Kern, Surf Sci 93(2000)449.
[3]Y. Zhang and H.J. Dai, Appl Phys Lett 77(2000)3015.
[4]V. Repain, J.M. Berroir, S. Rousset and J. Lecoeur, Surf Sci 447(2000)L152.
[5]P. Gambardella, M. Blanc, H. Brune, K. Kuhnke and K.Kern, Phys Rev B 61 2000(2254).
[6]P. Gambardella, A. Dallmeyer, K. Maiti, M.C. Malagoll, W.Eberhardt, K. Kern and C. Carbone, Nature 416(2002)301.
[7]A. Ayuela, H. Raebiger, M.J. Puska and R.M. Nieminen, Phys Rev B 66(2002)035417.
[8]S. Okada and A. Oshiyama, Phys Rev B 62(2000)R13286.
[9]D. Spi\v{s\'{ak and J. Hafner, Phys Rev B 67(2003)214416.
[10] P. Blaha, K. Schwarz, P. Sorantin and S.B. Trickey, Comput Phys Commun 59(1990)399.
[11] J.P. Perdew, K. Burke and M. Ernzerhof, Phys Rev Lett 77(1996)3865.
[12] C. Kittle, Introduction to Solid State Physics, 7th ed (Wiley, New York, 1996) p.300. |