2017
DOI: 10.7567/jjap.56.021201
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Band structures for short-period (InAs)n(GaSb)nsuperlattices calculated by the quasiparticle self-consistent GW method

Abstract: We apply a hybrid quasiparticle self-consistent GW (QSGW) method, QSGW80+SO [Deguchi et al., Jpn. J. Appl. Phys. 55, 051201 (2016)], to a type-II superlattice, which is (InAs)n(GaSb)n (n = 1, 2, 3, and 4) for infrared sensors. For the first time, we successfully obtained reliable energy bands of the superlattice. The calculated band gaps as functions of n differ from those obtained on the basis of other theories, although they are consistent with the results of a recent photoluminescence experiment. Our real-… Show more

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Cited by 13 publications
(15 citation statements)
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“…No further atomic relaxation is considered. It should be noted that fractional coordinates of constituent atoms from such a classical elasticity and relaxed by generalized gradient approximation as implemented in Vienna Ab-initio Simulation Package [46][47][48] are in surprisingly good agreement [17]. The modifications of the TB parameters have been accounted for by including generalized Harrison's d −2 law [49].…”
Section: Superlattice Propertiesmentioning
confidence: 99%
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“…No further atomic relaxation is considered. It should be noted that fractional coordinates of constituent atoms from such a classical elasticity and relaxed by generalized gradient approximation as implemented in Vienna Ab-initio Simulation Package [46][47][48] are in surprisingly good agreement [17]. The modifications of the TB parameters have been accounted for by including generalized Harrison's d −2 law [49].…”
Section: Superlattice Propertiesmentioning
confidence: 99%
“…More specifically, Figure 7 compares the band gap energies of the (InAs) n /(GaSb) n superlattices in the TB model together with the results of the TB model parametrized by Jancu et al, of empirical pseudopotential (EP) calculations [52], of the PL, and of the hybrid QSGW [17] method at α = 0.8. First, all the empirical calculations show shrinking band gap energies in an asymptotic way with the superlattce period n sufficiently large, which is in line with the results of the PL and hybrid QSGW methods.…”
Section: Superlattice Propertiesmentioning
confidence: 99%
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