...
机译:
Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil;
Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan;
CREST, Sendai, Miyagi 9808578, JapanUniv Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USAShinshu Univ, Fac Engn, Nagano 3808553, JapanMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA;