Polarity Inversion in Polar-Nonpolar-Polar Heterostructures

Sunglae Cho; Suk J. Youn; Yunki Kim; Antonio DiVenere; George K.L. Wong; Authur J. Freeman; J. B. Ketterson

doi:10.1103/PhysRevLett.87.126403

Polarity Inversion in Polar-Nonpolar-Polar Heterostructures

Sunglae Cho, Suk J. Youn, Yunki Kim, Antonio DiVenere, George K.L. Wong, Authur J. Freeman, J. B. Ketterson

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We have observed an epilayer-thickness-dependent polarity inversion for the growth of CdTe on Sb(Bi)/CdTe(111)B. For films with Sb(Bi) thicknesses of less than 40Å (15Å), the CdTe layer shows a B (Te-terminated) face, but it switches to an A (Cd-terminated) face for thicker layers. On the other hand, a CdTe layer grown on Bi(Sb)/CdTe(111)A always shows the A face regardless of Sb or Bi layer thicknesses. In order to address the observations we have performed ab initio calculations, which suggest that the polarity of a polar material on a nonpolar one results from the binding energy difference between the two possible surface configurations.

Original language	English (US)
Pages (from-to)	126403-126403-4
Journal	Physical review letters
Volume	87
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.87.126403
State	Published - Sep 17 2001

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.87.126403

Cite this

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title = "Polarity Inversion in Polar-Nonpolar-Polar Heterostructures",

abstract = "We have observed an epilayer-thickness-dependent polarity inversion for the growth of CdTe on Sb(Bi)/CdTe(111)B. For films with Sb(Bi) thicknesses of less than 40{\AA} (15{\AA}), the CdTe layer shows a B (Te-terminated) face, but it switches to an A (Cd-terminated) face for thicker layers. On the other hand, a CdTe layer grown on Bi(Sb)/CdTe(111)A always shows the A face regardless of Sb or Bi layer thicknesses. In order to address the observations we have performed ab initio calculations, which suggest that the polarity of a polar material on a nonpolar one results from the binding energy difference between the two possible surface configurations.",

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T1 - Polarity Inversion in Polar-Nonpolar-Polar Heterostructures

AU - Cho, Sunglae

AU - Youn, Suk J.

AU - Kim, Yunki

AU - DiVenere, Antonio

AU - Wong, George K.L.

AU - Freeman, Authur J.

AU - Ketterson, J. B.

PY - 2001/9/17

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N2 - We have observed an epilayer-thickness-dependent polarity inversion for the growth of CdTe on Sb(Bi)/CdTe(111)B. For films with Sb(Bi) thicknesses of less than 40Å (15Å), the CdTe layer shows a B (Te-terminated) face, but it switches to an A (Cd-terminated) face for thicker layers. On the other hand, a CdTe layer grown on Bi(Sb)/CdTe(111)A always shows the A face regardless of Sb or Bi layer thicknesses. In order to address the observations we have performed ab initio calculations, which suggest that the polarity of a polar material on a nonpolar one results from the binding energy difference between the two possible surface configurations.

AB - We have observed an epilayer-thickness-dependent polarity inversion for the growth of CdTe on Sb(Bi)/CdTe(111)B. For films with Sb(Bi) thicknesses of less than 40Å (15Å), the CdTe layer shows a B (Te-terminated) face, but it switches to an A (Cd-terminated) face for thicker layers. On the other hand, a CdTe layer grown on Bi(Sb)/CdTe(111)A always shows the A face regardless of Sb or Bi layer thicknesses. In order to address the observations we have performed ab initio calculations, which suggest that the polarity of a polar material on a nonpolar one results from the binding energy difference between the two possible surface configurations.

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Polarity Inversion in Polar-Nonpolar-Polar Heterostructures

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