Magnetoconductivity due to Quantum Interference in Strongly Underdoped YBa_2Cu_3O_x

(2) Argonne National Laboratory); B. W. Veal(2) ((1) Kent State University; C. C. Almasan (1); E. Cimpoiasu (1); G. A. Levin (1); Hong Zheng (2)

arxiv: cond-mat/0104058 · v1 · submitted 2001-04-03 · ❄️ cond-mat.supr-con · cond-mat.str-el

Magnetoconductivity due to Quantum Interference in Strongly Underdoped YBa₂Cu₃O_x

E. Cimpoiasu (1) , G. A. Levin (1) , C. C. Almasan (1) , Hong Zheng (2) , B. W. Veal(2) ((1) Kent State University , (2) Argonne National Laboratory) This is my paper

classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords sigmadeltacrystalsinterferencemagnetoconductivityquantumresultapplied

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We report magnetoconductivity measurements on YBa_2Cu_3O_x (x=6.25 and 6.36) single crystals. Our main result is that both the in-plane Delta_sigma_ab and out-of-plane Delta_sigma_c magnetoconductivities exhibit the field dependence characteristic of "two-dimensional" quantum interference in applied magnetic fields H parallel to the c-axis. Namely, Delta_sigma_c,ab are proportional to ln(H/H_0), with Delta_sigma_c/sigma_c substantially greater than Delta_sigma_ab/sigma_ab. We interpret this result as evidence of interlayer incoherence in these crystals, so that the phase-coherent trajectories are mostly confined to one bilayer.

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Magnetoconductivity due to Quantum Interference in Strongly Underdoped YBa₂Cu₃O_x

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