Lithium ions in the van der Waals gap of Bi2Se3 single crystals

Nuclear magnetic resonance as a probe of electronic states of Bi2Se3

“…On the other hand crystals grown in excess Se can also have Bi/Se antisite defects, which donate a single electron. 17 Although our NMR spectra indicate that we introduce some disorder in the samples with excess Se, it is not readily apparent that this disorder arises from antisite defects. Sample Batch Growth mechanism % Se these samples.…”

First-principles study of native point defects in Bi2Se3

“…The result is in good agreement with the previous report. 21 The donor levels ε(+2/+1) = 0.209 eV, ε(+1/0) = 0.231 eV, are 0.101 eV and 0.079 eV below the conduction band minimum(CBM) respectively. In previous study, 23 one positive charged V Se is not stable as the Fermi level moves through the bandgap, which is different from our present results.…”

“…13,[18][19][20] Hence, it is vital to investigate the nature of native defects in Bi 2 Se 3 . In experiments, lots of efforts 15,21 have been pursued on such issue. Urazhdin et al 15 23 found that V Se1 and Se Bi are the most favorable native defects under Bi-rich/Se-poor conditions and Bi-poor/Se-rich conditions, respectively.…”

Stability of (0001) Bi<inf>2</inf>Te<inf>3</inf> surface

“…The material possesses good cleavage and strong anisotropy of physical properties. Due to this effective chemical intercalation and nanosheets formation are possible [6], [7]. The present study is aimed to growth Bi 2 Te 3 crystal and evaluates cleaved surface properties by atomic-level sensitive techniques.…”