Transport properties of thallium series compounds Tl2Ba2Can−1CunO2n+4+x (n=1,2,3) with different oxygen content

Comparison of the hole concentration determined by transport measurement for the hole-doped cuprate superconductors

“…The n H V euc curve for the SrD-La214 exponentially increases with hole-doping. We also plot the data of Tl 2 Bar 2 CuO 6+δ (ODTl2201) [11] and Bi 2 Sr 2−x La x CuO 6+δ (LaD-Bi2201) [12] as a function of P pl . The n H V euc vs. P pl for the OD-Tl2201 and LaD-Bi2201 deviates upward from the n H V euc curve of the SrDLa214.…”

On the transformation of the normal-state band spectrum of Tl-based HTSC’s with increasing number of CuO2 layers and doping level

“…The values of the critical temperature, T c , for different near-optimally-doped Tl-2201 [1,2,4,17], Tl-2212 [1,2,4,11,12,18], Tl-2223 [1,2,4,6,12,13], and Tl-2234 [3,18] phases are presented in Fig. 5.…”

“…All the samples of Tl 2 Ba 2 CuO z (Tl-2201) [2,4,5], Tl 2 Ba 2 -Ca 1Àx Y x (Cu 1Ày Co y ) 2 O z (Tl-2212) [11], Tl 2 Ba 2 Ca 2 Cu 3 O z (Tl-2223) [2,4,6,[12][13][14], and Tl 1.7 Ba 2 Ca 3.3 Cu 4 O z (Tl-2234) [3] systems were prepared by the standard ceramics technology. The authors of the above papers have used different regimes of the final annealing resulting in a different oxygen subsystem condition of the investigated samples.…”

“…Using the above approach we have analyzed the set of the experimental data available in literature for the Tl-2201, Tl-2212, Tl-2223 and Tl-2234 systems [2][3][4][5][6][11][12][13][14] and determined the possible range of variation for all four model parameters for each sample. Summarizing the results obtained for specific samples of each phase we have determined the range of variation of parameters of the charge-carrier system for Tl 2 Ba 2 Ca nÀ1 Cu n O 2n+4+d with different n for the near-optimal compositions and different deviations from them for each phase.…”

“…The Tl 2 Ba 2 Ca nÀ1 Cu n O 2n+4+d system attracted our attention due to a possibility to prepare a series of solid solutions of the Tl-based family with various n. This allows the effect of CuO 2 layers number on superconducting and normal-state properties of those compounds to be revealed [1][2][3]. Besides, both the underdoped and overdoped regimes can be realized by changing oxygen content [3][4][5][6] or doping [1,7].…”