Study on the anomalies of thermoelectric power due to the normal-state pseudogap in underdoped cuprates

Thermoelectric power and resistivity in Nd2−Ce CuO4 system

“…(2) S(T) exhibits a broad maximum which shifts towards lower temperature with increasing x. These features have been reported for a variety of holedoped cuprate systems [9,10,[13][14][15]23].…”

“…Data on S(T) in hole-doped cuprates have been analyzed in terms of several theoretical models, other than a simple Fermi-liquid picture which leads to S(T) ∝ T, including a narrow conduction-band model [9,10], a Boson-Fermion theory [13], a pseudogap model [14] and a two-band theory [15]. Because of the wide availability to both metallic and degenerated semiconducting systems, we will adopt the first model in which spectrum of the conduction-band is assumed to contain a sharp peak near the Fermi level.…”

Specific heat and correlation between resistivity and thermoelectric power of GdBa2(Cu1−xMnx)3O7−δ HTSC system for x⩽0.02

“…Loram et al [8] have studied the specific heat of Co-doped YBa 2 Cu 3 O 7Àd , while Sisson et al [9] have studied the specific heat of Zn-doped YBa 2 Cu 3 O 7Àd system. As far as the thermoelectric power of doped Y-or Gd-based 123 systems is concerned, there exist studies with Zn [10], Pr [11], and Ca [12] doping.…”

Thermal transport in (Y,Gd)Ba2(Cu1−xMnx)3O7−δforx≤0.02

“…It is well established that partial substitution in cuprate superconductors in general leads to a change in the various properties of the pristine system [1][2][3][4][5][6][7][8][9][10][11][12][13]. Following such a route the practical applicability of the material may also be greatly enhanced.…”

“…Regarding the thermal behaviour of YBa 2 Cu 3 O 7−δ with other dopants at Cu sites, Loram et al [14] have studied the specific heat of Co-doped YBa 2 Cu 3 O 7−δ , while Sisson et al [15] have studied the specific heat of the Zn-doped YBa 2 Cu 3 O 7−δ system. The thermoelectric power of Zn-, Pr-and Ca-doped Y-or Gd-based 123 systems has also been investigated [8][9][10]. Suleiman et al [11], Houssa et al [12], and Williams et al [13] have made studies of the thermal conductivity of the YBa 2 Cu 3 O 7−δ system by taking Co, Zn and Yb, Dy and/or Sr dopants, respectively.…”