Spin dynamics in the pressure-induced two-leg ladder cuprate superconductor Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$

Abstract

Within the two-leg $t$-J ladder, the spin dynamics of the pressure-induced two-leg ladder cuprate superconductor Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$ is studied based on the kinetic energy driven superconducting mechanism. It is shown that in the pressure-induced superconducting state, the incommensurate spin correlation appears in the underpressure regime, while the commensurate spin fluctuation emerges in the optimal pressure and overpressure regimes. In particular, the spin-lattice relaxation time is dominated by a temperature linear dependence term at low temperature followed by a peak developed below the superconducting transition temperature, in qualitative agreement with the experimental observation on Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$.

8 pages, 5 figures, accepted for publication in Journal of Physics: Condensed Matter

References in corpus (7)

• A gauge invariant dressed holon and spinon description of the normal-state of underdoped cuprates
• The magnetic nature of superconductivity in doped cuprates
• Electronic structure of kinetic energy driven cuprate superconductors
• Hole redistribution in Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0, 12) spin ladder compounds: ^63Cu and ^17O NMR study under pressure
• NMR and NQR study of pressure-induced superconductivity and the origin of critical-temperature enhancement in the spin-ladder cuprate Sr${}_2$Ca${}_{12}$Cu${}_{24}$O${}_{41}$
• Superconductivity in doped two-leg ladder cuprates
• Pressure dependence of superconductivity in doped two-leg ladder cuprates

Cited by in corpus (1)

• Kinetic-energy driven superconductivity in cuprate superconductors