Lattice relaxation around arsenic and selenium in CdTe
Апстракт
We have investigated the lattice relaxation around impurity atoms at the anion sublattice in CdTe, such as As acting as acceptor and Se which is isovalent to Te, with fluorescence detected EXAFS. We experimentally verify the lattice relaxation with a bond length being reduced by 8% around the As atom as inferred indirectly from ab-initio calculations of the electric field gradient in comparison with the measured value in a PAC experiment (S. Lany et al., Phys. Rev. B 62, R2259 (2000)). In the case of the isovalent impurity atom Se, the bond length is similarly reduced as determined experimentally by EXAFS and by model calculations with the density functional theory implemented in the WIEN97 program. In contrast to this inward relaxation, preliminary calculations for Br in CdTe, the next element in the series As, Se, and Br, which acts as donor at the Te sublattice, indicate an increase in bond length, an interesting prediction waiting for experimental verification.
Извор:
Physica Scripta, 2005, T115, 369-371Колекције
Институција/група
VinčaTY - JOUR AU - Koteski, Vasil J. AU - Haas, H. AU - Holub-Krappe, E. AU - Ivanović, Nenad AU - Mahnke, Heinz-Eberhard PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2719 AB - We have investigated the lattice relaxation around impurity atoms at the anion sublattice in CdTe, such as As acting as acceptor and Se which is isovalent to Te, with fluorescence detected EXAFS. We experimentally verify the lattice relaxation with a bond length being reduced by 8% around the As atom as inferred indirectly from ab-initio calculations of the electric field gradient in comparison with the measured value in a PAC experiment (S. Lany et al., Phys. Rev. B 62, R2259 (2000)). In the case of the isovalent impurity atom Se, the bond length is similarly reduced as determined experimentally by EXAFS and by model calculations with the density functional theory implemented in the WIEN97 program. In contrast to this inward relaxation, preliminary calculations for Br in CdTe, the next element in the series As, Se, and Br, which acts as donor at the Te sublattice, indicate an increase in bond length, an interesting prediction waiting for experimental verification. T2 - Physica Scripta T1 - Lattice relaxation around arsenic and selenium in CdTe VL - T115 SP - 369 EP - 371 UR - https://hdl.handle.net/21.15107/rcub_vinar_2719 ER -
@article{ author = "Koteski, Vasil J. and Haas, H. and Holub-Krappe, E. and Ivanović, Nenad and Mahnke, Heinz-Eberhard", year = "2005", abstract = "We have investigated the lattice relaxation around impurity atoms at the anion sublattice in CdTe, such as As acting as acceptor and Se which is isovalent to Te, with fluorescence detected EXAFS. We experimentally verify the lattice relaxation with a bond length being reduced by 8% around the As atom as inferred indirectly from ab-initio calculations of the electric field gradient in comparison with the measured value in a PAC experiment (S. Lany et al., Phys. Rev. B 62, R2259 (2000)). In the case of the isovalent impurity atom Se, the bond length is similarly reduced as determined experimentally by EXAFS and by model calculations with the density functional theory implemented in the WIEN97 program. In contrast to this inward relaxation, preliminary calculations for Br in CdTe, the next element in the series As, Se, and Br, which acts as donor at the Te sublattice, indicate an increase in bond length, an interesting prediction waiting for experimental verification.", journal = "Physica Scripta", title = "Lattice relaxation around arsenic and selenium in CdTe", volume = "T115", pages = "369-371", url = "https://hdl.handle.net/21.15107/rcub_vinar_2719" }
Koteski, V. J., Haas, H., Holub-Krappe, E., Ivanović, N.,& Mahnke, H.. (2005). Lattice relaxation around arsenic and selenium in CdTe. in Physica Scripta, T115, 369-371. https://hdl.handle.net/21.15107/rcub_vinar_2719
Koteski VJ, Haas H, Holub-Krappe E, Ivanović N, Mahnke H. Lattice relaxation around arsenic and selenium in CdTe. in Physica Scripta. 2005;T115:369-371. https://hdl.handle.net/21.15107/rcub_vinar_2719 .
Koteski, Vasil J., Haas, H., Holub-Krappe, E., Ivanović, Nenad, Mahnke, Heinz-Eberhard, "Lattice relaxation around arsenic and selenium in CdTe" in Physica Scripta, T115 (2005):369-371, https://hdl.handle.net/21.15107/rcub_vinar_2719 .