Small, vol. 13, no. 14, 2017-02
Japanese Journal of Applied Physics, vol. 55, no. 1, 2016-01
MATERIALS SCIENCE AND TECHNOLOGY, vol. 27, no. 9, page. 1461 - 1464, 2011-09
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, vol. 42, no. 5, page. 1536 - 1539, 2010-03