Zobrazeno 1 - 10
of 322
pro vyhledávání: '"Polturak, E."'
The hypothesis regarding the existence of uncorrelated pre-formed pairs in the pseudogap regime of superconducting $YBa_2Cu_3O_y$ is tested experimentally using bilayers of $YBa_2Cu_3O_y$ and the itinerant ferromagnet $SrRuO_3$. In our study, we moni
Externí odkaz:
http://arxiv.org/abs/0707.2497
Cuprate films offer a unique opportunity to observe vortex tunneling effects, due to their unusually low superfluid density and short coherence length. Here, we measure the magnetoresistance (\textit{MR}) due to vortex motion of a long meander line o
Externí odkaz:
http://arxiv.org/abs/0707.2484
We report neutron scattering measurements on bcc solid $^{4}$% He. We studied the phonon branches and the recently discovered ''optic-like'' branch along the main crystalline directions. In addition, we discovered another, dispersionless "optic-like'
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604477
Using Path Integral Monte Carlo and the Maximum Entropy method, we calculate the dynamic structure factor of solid He-3 in the bcc phase at a finite temperature of T = 1.6 K and a molar volume of 21.5 cm^3. From the single phonon dynamic structure fa
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603323
At low pressure, free surfaces play a crucial role in the melting transition. Under pressure, the surface of the sample is acted upon by some pressure transmitting medium. To examine the effect of this medium on melting, we performed Monte Carlo simu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512574
Transport measurements along the node and anti-node directions in the a-b plane of optimally doped and epitaxial thin films of YBCO are reported. Low bias magnetoresistance measurements near and below T_c show that the flux flow resistivity along the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0508754
Autor:
Pelleg, O., Shay, M., Lipson, S. G., Polturak, E., Bossy, J., Marmeggi, J. C., Kentaro, H., Farhi, E., Stunault, A.
We report neutron diffraction studies of low density bcc and hcp solid 4He. In the bcc phase, we observed a continuous dynamical behaviour involving macroscopic structural changes of the solid. The dynamical behaviour takes place in a cell full of so
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505763
We report magnetoresistance measurements of ramp type superconductor-normal-superconductor (SNS) junctions. The junctions consist of underdoped $YBa_{2}Cu_{3}O_y$ (YBCO) electrodes separated by a barrier of $YBa_{2}Cu_{2.6}Ga_{0.4}O_y$. We observe a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502254
Using Path Integral Monte Carlo and the Maximum Entropy method, we calculate the dynamic structure factor of solid $^4$He in the bcc phase at a finite temperature of T = 1.6 K and a molar volume of 21 cm$^3$. Both the single-phonon contribution to th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502108
Autor:
Maniv, A., Polturak, E., Koren, G., Bliokh, Y., Biehler, B., Runge, B-U, Leiderer, P., Shapiro, B. Ya., Shapiro, I.
We report the discovery of a new mechanism of spontaneous generation of a magnetic flux in a superconductor cooled through $T_c$. The sign of the spontaneous flux changes randomly from one cooldown to the next, and follows a Gaussian distribution. Th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411051