26059
However , our studies of perpendicular - to - plane magnetotransport in straight - channel , diffusive devices of epitaxial Bi2Se3 surprisingly reveal signatures of Aharonov - Bohm orbits - - periodic conductance fluctuation magneto - fingerprints - - even though the devices are not explicitly patterned into loops .
 Chemical: Bi2Se3
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Bi2Se3