APPLIED PHYSICS LETTERS, vol. 81, no. 17, page. 3257 - 3259, 2002-10-21
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 41, no. 1, page. 144 - 148, 2002-07
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 41, no. 4A, page. 1920 - 1923, 2002-04
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, vol. 21, no. 2-4, page. 1046 - 1052, 2004-03
APPLIED PHYSICS LETTERS, vol. 80, no. 11, page. 1924 - 1926, 2002-03-18