The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x)
Apstrakt
A model for the charge transfer mechanism in YBa(2)Cu(3)O(6+x) high-T(c) cuprate based on the critical chain length concept is proposed to account for the 60 and 90 K plateaus in the T(c)(x) dependence. It has been shown that, when the statistics of CuO chain formation was described in terms of the two-dimensional asymmetric next-to-nearest neighbor Ising (ASYNNNI) model, at any constant temperature below the top of ortho-II phase there exists a uniquely defined value of critical chain length l(cr)(T) that yields a constant doping p(x) approximate to const over the regime of ortho-II phase (related to the 60 K plateau of T(c)(x)), while the 90 K plateau coincides with the monotonically increasing p(x) over the optimal doping level p = 0.16 in the regime of the ortho-I phase. Short length chains (l LT l(cr)(T)), together with the first l(cr)(T)-2 holes in longer chains (l GT = l(cr)(T)), are taken as not capable of attracting electrons from CuO(2) planes. It is shown that only a part (a...pproximate to 41%) of the remaining l - l(cr)(T)+1 holes in the long chains can capture electrons. The results obtained indicate that the ASYNNNI model and two-plateau-like behavior of T(c)(x) in YBa(2)Cu(3)O(6+x) are closely connected.
Izvor:
Journal of Physics: Condensed Matter, 2007, 19, 34
DOI: 10.1088/0953-8984/19/34/346230
ISSN: 0953-8984
WoS: 000254100500019
Scopus: 2-s2.0-80455132212
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Matić, Vladimir M. AU - Lazarov, Nenad Đ. PY - 2007 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3234 AB - A model for the charge transfer mechanism in YBa(2)Cu(3)O(6+x) high-T(c) cuprate based on the critical chain length concept is proposed to account for the 60 and 90 K plateaus in the T(c)(x) dependence. It has been shown that, when the statistics of CuO chain formation was described in terms of the two-dimensional asymmetric next-to-nearest neighbor Ising (ASYNNNI) model, at any constant temperature below the top of ortho-II phase there exists a uniquely defined value of critical chain length l(cr)(T) that yields a constant doping p(x) approximate to const over the regime of ortho-II phase (related to the 60 K plateau of T(c)(x)), while the 90 K plateau coincides with the monotonically increasing p(x) over the optimal doping level p = 0.16 in the regime of the ortho-I phase. Short length chains (l LT l(cr)(T)), together with the first l(cr)(T)-2 holes in longer chains (l GT = l(cr)(T)), are taken as not capable of attracting electrons from CuO(2) planes. It is shown that only a part (approximate to 41%) of the remaining l - l(cr)(T)+1 holes in the long chains can capture electrons. The results obtained indicate that the ASYNNNI model and two-plateau-like behavior of T(c)(x) in YBa(2)Cu(3)O(6+x) are closely connected. T2 - Journal of Physics: Condensed Matter T1 - The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x) VL - 19 IS - 34 DO - 10.1088/0953-8984/19/34/346230 ER -
@article{ author = "Matić, Vladimir M. and Lazarov, Nenad Đ.", year = "2007", abstract = "A model for the charge transfer mechanism in YBa(2)Cu(3)O(6+x) high-T(c) cuprate based on the critical chain length concept is proposed to account for the 60 and 90 K plateaus in the T(c)(x) dependence. It has been shown that, when the statistics of CuO chain formation was described in terms of the two-dimensional asymmetric next-to-nearest neighbor Ising (ASYNNNI) model, at any constant temperature below the top of ortho-II phase there exists a uniquely defined value of critical chain length l(cr)(T) that yields a constant doping p(x) approximate to const over the regime of ortho-II phase (related to the 60 K plateau of T(c)(x)), while the 90 K plateau coincides with the monotonically increasing p(x) over the optimal doping level p = 0.16 in the regime of the ortho-I phase. Short length chains (l LT l(cr)(T)), together with the first l(cr)(T)-2 holes in longer chains (l GT = l(cr)(T)), are taken as not capable of attracting electrons from CuO(2) planes. It is shown that only a part (approximate to 41%) of the remaining l - l(cr)(T)+1 holes in the long chains can capture electrons. The results obtained indicate that the ASYNNNI model and two-plateau-like behavior of T(c)(x) in YBa(2)Cu(3)O(6+x) are closely connected.", journal = "Journal of Physics: Condensed Matter", title = "The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x)", volume = "19", number = "34", doi = "10.1088/0953-8984/19/34/346230" }
Matić, V. M.,& Lazarov, N. Đ.. (2007). The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x). in Journal of Physics: Condensed Matter, 19(34). https://doi.org/10.1088/0953-8984/19/34/346230
Matić VM, Lazarov NĐ. The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x). in Journal of Physics: Condensed Matter. 2007;19(34). doi:10.1088/0953-8984/19/34/346230 .
Matić, Vladimir M., Lazarov, Nenad Đ., "The origin of the 60 K plateau in YBa(2)Cu(3)O(6+x)" in Journal of Physics: Condensed Matter, 19, no. 34 (2007), https://doi.org/10.1088/0953-8984/19/34/346230 . .