Schmidt KP (2001)
Publication Status: Published
Publication Type: Journal article
Publication year: 2001
Publisher: E D P SCIENCES
Book Volume: 56
Pages Range: 877-883
Journal Issue: 6
The Raman response in the antiferromagnetic 2-leg S = 1/2 Heisenberg ladder is calculated for various couplings by continuous unitary transformations. For leg couplings above 80% of the rung coupling a characteristic 2-peak structure occurs with a point of zero intensity within the continuum. Experimental data for CaV2O5 and LayCa14-yCu24O41 are analyzed and the coupling constants are determined. Evidence is found that the Heisenberg model is not sufficient to describe cuprate ladders. We argue that a cyclic exchange term is the appropriate extension.
APA:
Schmidt, K.P. (2001). Raman response in antiferromagnetic two-leg S=1/2 Heisenberg ladders. EPL - Europhysics Letters, 56(6), 877-883.
MLA:
Schmidt, Kai Phillip. "Raman response in antiferromagnetic two-leg S=1/2 Heisenberg ladders." EPL - Europhysics Letters 56.6 (2001): 877-883.
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