Magnetotransport Mechanisms in Strongly Underdoped YBa_2Cu_3O_x Single Crystals

Details Magnetotransport Mechanisms in Strongly Underdoped YBa_2Cu_3O_x Single Crystals Magnetotransport Mechanisms in Strongly Underdoped YBa_2Cu_3O_x Single Crystals

2001-09-26

arxiv.org/abs/cond-mat/0109489v1

Phys. Rev. B 64, 104514 (2001)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.64.104514

We report magnetoresistivity measurements on strongly underdoped YBa_2Cu_3O_x (x=6.25, 6.36) single crystals in applied magnetic fields H || c-axis. We identify two different contributions to both in-plane and out-of-plane magnetoresistivities. The first contribution has the same sign as the temperature coefficient of the resistivity \partial ln(\rho_i)/\partial T (i={c,ab}). This contribution reflects the incoherent nature of the out-of-plane transport. The second contribution is positive, quadratic in field, with an onset temperature that correlates to the antiferromagnetic ordering.

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