1D quantum transport in the even-chain spin-ladder compound and
Laboratorium voor Vaste-Stoffysica en Magnetisme,
Katholieke Universiteit Leuven
Celestijnenlaan 200 D - B-3001 Leuven, Belgium
Accepted: 14 January 1999
The temperature dependence of the resistivity of the novel ladder compound under hydrostatic pressure of up to 8 GPa has been explained by assuming that the relevant length scale for electrical transport is given by the magnetic correlation length related to the opening of a spin-gap in a 1D even-chain spin-ladder (1D-SL). The pressure dependence of the gap was extracted by applying this model to data obtained at different pressures. The dependence of the underdoped cuprate demonstrates a remarkable scaling with the of the 1D-SL compound . This scaling implies that underdoped cuprates at are in the 1D regime and their pseudo-gap below T* is the spin-gap in the even-chain 1D-SL formed at in these materials.
PACS: 75.10.Jm – Quantized spin models / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.)
© EDP Sciences, 1999