Spin Gap in the Hole-Doped Spin Ladder System(Sr2.5Ca11.5)Cu24

Hole distribution in(Sr,Ca,Y,La)14CuNücker1, Merz2, Kuntscher3 et al. 2000Phys. Rev. BSelf Cite114171072View full textAdd to dashboardCite

“…On the other hand, other NMR ͑Ref. 13͒ and neutron scattering 18 experiments find a constant spin gap upon Ca substitution for the ladders as well. Chemical pressure by Ca substitution for Sr as well as physical pressure reduces the interlayer distances 19 and increases the twisting of the CuO 2 chain.…”

Magnetization of hole-dopedCuO2spin chains inSr14−xKlingeler1, Tristan2, Büchner3 et al. 2005Phys. Rev. B154121View full textAdd to dashboardCite

“…For the low temperature magnetic response, the ladders do not contribute significantly since they exhibit a non-magnetic ground state and a large spin gap of ∆ ≈ 380 K for the whole doping series Sr 14−x Ca x Cu 24 O 41 . [8][9][10] Thus, the low temperature magnetic response of these compounds is determined by the weakly coupled CuO 2 spin chains. The chains consist of edge-sharing CuO 4 -plaquettes containing Cu 2+ -ions with S = 1 2 in the undoped case.…”

Spin-gap evolution upon Ca doping in the spin-ladder series Sr14−xCaxCu24

“…Up to now, the ground state of this spin-ladder superconductor in ambient pressure has not been well understood because of contradictive reports from different experimental methods. 9,10 Similar to the high temperature superconducting cuprates with 2D lattices, investigating the physics of the normal phase of Sr 14−x Ca x Cu 24 O 41 should provide a solid basis to understand the superconducting mechanism. Therefore, it is extremely important to reveal the physics of the normal state of this spin-ladder compound in order to find out the differences between Sr 14−x Ca x Cu 24 O 41 and other 2D superconductors, and further our understanding to their superconducting mechanisms.…”