Chain cuprates and interchain coupling

Saturation Field of Frustrated Chain Cuprates: Broad Regions of Predominant Interchain Coupling.
S. Nishimoto, S.-L. Drechsler, R. O. Kuzian, J. van den Brink, J. Richter, W. E. A. Lorenz, Y. Skourski, Klingeler, and B. Büchner
Phys. Rev. Lett. 107, 097201 (2011)

Crystal structure of Li2CuO2 with two CuO2 chains per unit cell along the b axis. Right: View along the c axis on the ab plane. The main in- and interchain couplings J1;2 and JIC, J0 IC: arcs and dashed lines, respectively. The normalized ICs read beta_1= J_IC/J_1 and beta_2 =J_IC/J_1.

 

Part of the 3D phase diagram around Li2CuO2 in terms of beta_2 and alpha. hs is given by contour lines.