1. P.D. Ye, G.D. Wilk, B. Yang, J. Kwo, H.-J.L. Gossmann, M. Hong, K.K. Ng, and J. Bude, Appl. Phys. Lett. 84, 434 (2004).
2. Y. Xuan, H.C. Lin, P.D. Ye, and G.D. Wilk, Appl. Phys. Lett. 88, 434 (2006).
3. J. Huang, N. Goel, H. Zhao, C.Y. Kang, K.S. Min, G. Bersuker, S. Oktyabrsky, C.K. Gaspe, M.B. Santos, P. Majhi, P.D. Kirsch, H.-H. Tseng, J.C. Lee, and R. Jammy, IEDM (2009), p. 1.
4. Y.Q. Wu, R.S. Wang, T. Shen, J.J. Gu, and P.D. Ye, IEDM (2009), p. 1.
5. F.C. Jain, E. Suarez, M. Gogna, F. Al-Amoody, D. Butkiewicus, R. Hohner, T. Liaskas, S. Karmakar, P.-Y. Chan, B. Miller, J. Chandy, and E. Heller, J. Electron. Mater. 38, 1574 (2009).