26060
We show that the length scale of these orbits corresponds to the typical perimeter of triangular terraces found on the surface of these thin film devices , strongly suggesting that the periodic magneto - fingerprint arises from coherent scattering of electron waves from the step - edges .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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