TY - JOUR
T1 - Optical absorption spectra of Xene and Xane (X = silic, german, stan)
AU - Nguyen-Truong, Hieu T.
AU - Van On, Vo
AU - Lin, Ming Fa
N1 - Publisher Copyright:
© 2021 IOP Publishing Ltd.
PY - 2021/9
Y1 - 2021/9
N2 - We study optical absorption spectra of Xene and Xane (X = silic, german, stan). The results show that the optical absorption spectra of Xenes are dominated by a sharp peak near the origin due to direct interband transitions near the K point of the Brillouin zone. Meanwhile, the optical absorption spectra of Xanes are characterized by an excitonic peak. The Xenes are zero-gap materials with a Dirac cone at the K point, whereas Xanes are semiconductors with sizable band gaps. The quasiparticle band gaps of silicane, germanane, and stanane are 3.60, 2.21, and 1.35 eV, respectively; their exciton binding energies are 0.40, 0.33, and 0.20 eV, respectively.
AB - We study optical absorption spectra of Xene and Xane (X = silic, german, stan). The results show that the optical absorption spectra of Xenes are dominated by a sharp peak near the origin due to direct interband transitions near the K point of the Brillouin zone. Meanwhile, the optical absorption spectra of Xanes are characterized by an excitonic peak. The Xenes are zero-gap materials with a Dirac cone at the K point, whereas Xanes are semiconductors with sizable band gaps. The quasiparticle band gaps of silicane, germanane, and stanane are 3.60, 2.21, and 1.35 eV, respectively; their exciton binding energies are 0.40, 0.33, and 0.20 eV, respectively.
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U2 - 10.1088/1361-648X/ac0d82
DO - 10.1088/1361-648X/ac0d82
M3 - Article
C2 - 34157695
AN - SCOPUS:85111096328
SN - 0953-8984
VL - 33
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 35
M1 - 355701
ER -