نتایج جستجو برای: ابررسانای yba2cu3o7
تعداد نتایج: 1321 فیلتر نتایج به سال:
Phase-sensitive tests of pairing symmetry have provided strong evidence for predominantly d-wave pairing symmetry in both the holeand electron-doped high-Tc cuprate superconductors. Temperature dependent measurements in YBa2Cu3O7−δ (YBCO) indicate that the d-wave pairing dominates, with little if any imaginary component, at all temperatures from 0.5K through Tc. In this article we review some o...
Magneto-fluctuations of the normal resistance RN have been reproducibly observed in YBa2Cu3O7-d biepitaxial grain boundary junctions at low temperatures. We attribute them to mesoscopic transport in narrow channels across the grain boundary line, occurring even in the presence of large voltage drops. The Thouless energy appears to be the relevant energy scale. Possible implications on the under...
067004-1 We have directly observed well-separated Josephson vortex splinters with unquantized magnetic flux at asymmetric 45 grain boundaries in YBa2Cu3O7 films by imaging magnetic flux with scanning SQUID microscopy. The existence of these splinter vortices has been predicted and is well described by a model based on dx2 y2 pairing symmetry and facetting of the grain boundary on a length scale...
The in-plane normal-state resistivity of Zn-doped YBa2Cu3O7−δ and heavily underdoped pure YBCO single crystals is measured down to low temperatures under magnetic fields up to 18 T. We found that the temperature dependence of the normal-state ρab does not obey log(1/T ) and tends not to diverge in the low temperature limit. The result suggests that the “ground state” of the normal state of YBCO...
وجود همزمان خاصیت ابررسانایی و فرومغناطیسیته در یک ابررسانای فرومغناطیس، فاز ابررساناییfflo ، می تواند با اثر تقارب میان یک لایه نازک فرومغناطیس و یک لایه نازک ابررسانا بدست آید. اخیرا، ترابرد کوانتومی در پیوندهای بر پایه گرافن توجه زیادی را به خود جلب کرده است، که ناشی از خواص قابل توجه گرافن است. در این پایان نامه، به بررسی رسانندگی، قطبیدگی اسپینی و مغناطومقاومت در ساختار ابررسانای ف...
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