Studies of High Temperature Superconductors: (advances in Research and Applications).. Golden jubilee volume. Volume 50
This Golden Jubilee volume in the world's foremost series on superconductivity covers wide-ranging topics capturing the current excitement in the field. The broad areas include the advancement of high Tc theory, materials depicting unusual characteristics, materials' processing and defect structures for improved properties, their electromagnetic response, flux pinning, Josephson junctions and devices, and large scale applications.
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A.S. Alexandrov applied field applied magnetic field atomic band bias current bipolaron bosons boundaries c-axis calculated carriers chemical potential coherence length condensation conductor Coulomb critical current density cryogenic cryostat crystal cuprates current-voltage characteristics curves decrease described dielectric doped effect electric field Electrical Insulation electron energy equation experimental fermions FFO linewidth field dependence Figure flux creep flux pinning frequency High Temperature Superconductors hole HTS cable IEEE Trans in-plane increase induced interaction ions Jirsa Josephson junction lattice layer Lett M. R. Koblischka magnetic field magnetization voltage materials measured Mg-Mg bond MgB2 Murakami Muralidhar nanodomains nanoparticles normal observed obtained order parameter pairs peak phonons Phys Physica pinning centers planes polaron ratio resistivity Sakai sample shown in Fig structure Supercond superconducting surface tape temperature dependence transition tunnelling underdoped vortex pinning vortices YBCO
Page 19 - > 0, "x" bipolaron band has its minima at K =(±n, 0) and y-band at K — (0, ±7i). In these equations t is the renormalized hopping integral between p orbitals of the same symmetry elongated in the direction of the hopping (ppa) and t' is the renormalized hopping integral in the perpendicular direction (ppn).
Page 4 - ... has led many researchers to say that there is no theory of HTS and no progress in understanding the phenomenon. A significant fraction of theoretical research in the field has suggested that the interaction in novel superconductors is essentially repulsive and unretarted, and it could provide high Tc without phonons. Indeed strong onsite repulsive correlations (Hubbard U) are essential in shaping the insulating state of undoped (parent) compounds. Different from conventional band-structure insulators...