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Proceedings Paper

Scaling behavior of the normal-state properties of the underdoped high-Tc cuprates
Author(s): Victor V. Moshchalkov; Lieven Trappeniers; Johan Vanacken; Yvon Bruynseraede
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Paper Abstract

The scaling behavior of the normal state transport and magnetic properties of the underdoped cuprates as a function of T/T0 is now interpreted as an evidence for the opening of a pseudogap at T* approximately T0. To investigate the origin of the pseudogap, we have analyzed first the temperature dependence of the resistivity (rho) (T) of the novel Sr2.5Ca11.5Cu24O41 spin-ladder compound under hydrostatic pressure of up to 8 GPa. This (rho) (T) dependence has been successfully explained by assuming that the relevant length scale for electrical transport -- the inelastic length -- is given by the magnetic correlation length related to the opening of a spin-gap in a one- dimensional (1D) even-chain spin-ladder (1D-SL). As a next step, we compared the (rho) (T) curves of the SL compounds and underdoped cuprates. We have found that the (rho) (T) dependences of YBa2Cu4O8 and underdoped YBa2Cu3Ox demonstrate a remarkable scaling with the (rho) (T) of the 1D-SL compound Sr2.5Ca11.5Cu24O41. This scaling implies that the pseudo-gap below T* in underdoped YBa2Cu4O8 and YBa2Cu3Ox is the spin-gap in the even-chain 1D-SL formed at T less than T* in these materials. Therefore, at temperatures Tc(x) less than T less than T*(x), underdoped cuprates are effectively in a 1D ('stripe') regime. A Josephson-like coupling of these stripes leads to a recovery of a 2D regime at low temperatures T approximately Tc(x).

Paper Details

Date Published: 22 December 1998
PDF: 7 pages
Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); doi: 10.1117/12.335893
Show Author Affiliations
Victor V. Moshchalkov, Katholieke Univ. Leuven (Belgium)
Lieven Trappeniers, Katholieke Univ. Leuven (Belgium)
Johan Vanacken, Katholieke Univ. Leuven (Belgium)
Yvon Bruynseraede, Katholieke Univ. Leuven (Belgium)


Published in SPIE Proceedings Vol. 3481:
Superconducting and Related Oxides: Physics and Nanoengineering III
Davor Pavuna; Ivan Bozovic, Editor(s)

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