Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Singer, J. M."'
Autor:
Schneider, T., Singer, J. M.
We outline the universal and finite temperature critical properties of the 3D-XY model, extended to anisotropic extreme type-II superconductors, as well as the universal quantum critical properties in 2D. On this basis we review: (i) the mounting evi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0001258
Autor:
Hofer, J., Schneider, T., Singer, J. M., Willemin, M., Keller, H., Sasagawa, T., Kishio, K., Conder, K., Karpinski, J.
Angular-dependent magnetic torque measurements performed near the critical temperature on single crystals of HgBa_{2}CuO_{4+y}, La_{2-x}Sr{x}CuO_{4}, and YBa_{2}Cu_{3}O_{6.93} are scaled, following the 3D XY model, in order to determine the scaling f
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912052
Autor:
Schneider, T., Singer, J. M.
We analyze recent measurements by Ooi et al. of the angular dependence of the first order vortex phase transition in Bi_2Sr_2CaCu_2O_{8+y}. The experimental findings of these authors are interpreted in terms of a 2D versus 3D scaling approach. Invoki
Externí odkaz:
http://arxiv.org/abs/cond-mat/9911411
Autor:
Schneider, T., Singer, J. M.
We analyze high precision, high resolution microcalorimetric specific heat data of detwinned YBa2Cu3O(7-delta) single crystals. It is shown that a finite size effect must be taken into account when attempting to extract critical properties. Contrary
Externí odkaz:
http://arxiv.org/abs/cond-mat/9911352
Autor:
Schneider, T., Singer, J. M.
The $c$-axis resistivity measurements in YBa_2Cu_4O_8 from Hussey et al. for magnetic field orientations along the c-axis as well as within the ab-plane are analyzed and interpreted using the scaling theory for static and dynamic classical critical p
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812301
Autor:
Schneider, T., Singer, J. M.
We discuss the occurrence of crossing points in the magnetization - temperature $(m,T$) plane within the framework of critical phenomena. It is shown that in a two-dimensional superconducting slab of thickness $d_{s}$ $m_{z}(\delta)$ versus temperatu
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812082
Autor:
Schneider, T., Singer, J. M.
Considerable progress has been made over the last decade in understanding the phenomenological properties of the cuprate high-T$_{c}$ superconductors and in producing well characterized high quality materials. Nevertheless, the pairing mechanism itse
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812081
We implement a Quantum Monte Carlo calculation for a repulsive Hubbard model with nearest and next-nearest neighbor hopping interactions on clusters up to 12x12. A parameter region where the Fermi level lies close to the van Hove singularity at the S
Externí odkaz:
http://arxiv.org/abs/cond-mat/9608030
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Autor:
Loomis, D, Saldiva, P H, Singer, J M, Böhm, G M, Conceição, G M, Kishi, H S, Pereira, L A, Arcas, R M, Braga, A L
The associations among daily counts of intrauterine mortality and pollutant concentrations (NO2, SO2, CO, O3, and particulate matter (3/4)10 microm) were investigated for the period ranging from January 1991 to December 1992 in the city of São Paulo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4c82fb85e9ec9149f95c07ebb0b0e63