Evidence for Vortices in the Pseudogap Region of Y_(1-x)Pr_xBa_2Cu_3O_7 from Angular Magnetoresistivity Measurements

V. Sandu; E. Cimpoiasu; T. Katuwal; Shi Li; M.B. Maple; C.C. Almasan

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Evidence for Vortices in the Pseudogap Region of Y_(1-x)Pr_xBa_2Cu_3O_7 from Angular Magnetoresistivity Measurements

机译：Y_（1-x）Pr_xBa_2Cu_3O_7的Pseeudogap区中涡旋的角磁阻测量结果

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In-plane angular magnetoresistivity Δρ_(ab)~(anis) measurements were made on Y_(1-x)Pr_xBa_2Cu_3O_(7-δ) single crystals in the pseudogap region. For x ≥ 0.2 single crystals, Δρ_(ab)~(anis)(θ) displays a deviation from the typical quasiparticle contribution (∝ sin~2θ) for temperatures smaller than a certain value T_φ in the pseudogap region. This deviation is consistent with a flux-flow type contribution to angular magneto-resistivity, indicating the presence of vortexlike excitations above the zero-field critical temperature in the pseudogap region.

机译：在伪间隙区域内对Y_（1-x）Pr_xBa_2Cu_3O_（7-δ）单晶进行面内角磁阻Δρ_（ab）〜（anis）测量。对于x≥0.2的单晶，Δρ_（ab）〜（anis）（θ）与伪间隙区域中的温度小于特定值T_φ的典型准粒子贡献（∝ sin〜2θ）出现偏差。该偏差与磁通流类型对角磁阻的贡献一致，表明在伪间隙区域中零场临界温度以上存在涡状激发。

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来源
《Physical review letters》 |2004年第17期|p.177005.1-177005.4|共4页
作者
V. Sandu; E. Cimpoiasu; T. Katuwal; Shi Li; M.B. Maple; C.C. Almasan;
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作者单位

National Institute of Materials Physics, R76900 Bucharest, Romania;

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正文语种 eng
中图分类物理学;
关键词
transport properties (electric and thermal conductivity, thermoelectric effects, etc.); metal-insulator transitions and other electronic transitions; Y-based cuprates; colossal magnetoresistance;

机译：传输特性（电导率和热导率;热电效应等）;金属-绝缘体转变和其他电子转变;Y型铜酸盐;巨大的磁阻;

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Evidence for Vortices in the Pseudogap Region of Y_(1-x)Pr_xBa_2Cu_3O_7 from Angular Magnetoresistivity Measurements

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