New Challenges in Superconductivity: Experimental Advances by J. Ashkenazi, Mikhail V. Eremin, Joshua L. Cohn, Ilya

By J. Ashkenazi, Mikhail V. Eremin, Joshua L. Cohn, Ilya Eremin, Dirk Manske, Davor Pavuna, Fuliln Zuo

This quantity comprises the complaints of the 2004 college of Miami Workshop on Unconventional Superconductivity. The workshop was once the fourth in a sequence of winning conferences on High-TC Superconductivity and similar themes, which happened on the James L. Knight Physics development at the collage of Miami campus in Coral Gables, Florida, in January 1991, 1995, 1999, and 2004. the amount comprises high quality papers on cutting-edge works on unconventional superconductivity. A key factor, mentioned via many within the workshop, used to be how homogeneous the cuprates are. STM information, in addition to different studies, confirmed that the cuprate superconductors (SC's) studied have been inhomogeneous, in particular within the underdoped regime; whereas experiments, like ARPES and magnetoresistance have proven the lifestyles of a Fermi floor, not less than above a few doping point, within the cuprates. different issues starting from the pseudogap challenge to pairing mechanisms also are mentioned via a variety of authors.  mostly, experiments convey extra convergence than high-TC theories. there's certainly no consensus at the excessive- TC mechanism, even supposing huge teams exist: these round the prolonged "Big Tent" homogenous scheme, and people who suppose an intrinsic inhomogeneous country. one other department may be seen among those that ponder the excessive- TC mechanism to be primarily of an electronic-magnetic foundation (with no position performed by means of the lattice), and those that assign a tremendous function to the lattice. There appeared to be a consensus within the workshop that MgB2 and the fullerenes are easier SC's than the cuprates, whereas paintings on ruthenocuprates and the coexistence of SC and ferromagnetism supplied new stimuli to investigate and figuring out. curiosity used to be drawn additionally via the hot NaxCoO2•yH2O SC. even supposing this can be a low-TC fabric, its actual houses have a similarity to these of the cuprates; therefore study in this procedure appears vital for the knowledge of excessive TC SC. the amount offers a quick evaluation of many features of modern day superconductivity study and will be of significant curiosity to all scientists and study scholars who paintings within the box of superconductivity or comparable topics in condensed subject physics and fabric sciences.

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Additional info for New Challenges in Superconductivity: Experimental Advances and Emerging Theories: Proceedings of the NATO Advanced Research Workshop, held in Miami, Florida, ... II: Mathematics, Physics and Chemistry)

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The crystal structure of monolayer Tl2201 has the tetragonal I4/mmm representation with consecutive CuO2 layers being displaced by half a unit cell. This body-centred-tetragonal symmetry of the crystal lattice imposes certain symmetry constraints on the resultant Fermi surface, namely that coefficients kmn are non-zero only for n even and m divisible by 4, or for n odd and mmod4 = 2 [5]. Following the standard procedure for a series expansion, we proceed by expanding to the lowest order necessary to satisfy these constraints and fit to the data.

Randeria, condmat/0209476 [to appear in “Physics of Conventional and Unconventional Superconductors”, ed. K. H. Bennemann and J. B. Ketterson (Springer-Verlag)]. [3] A. Santander-Syro at al. , Phys. Rev. Lett. 88, 097005 (2002). [4] Y. , Phys. Rev. B 69, 024504 (2004). [5] N. P. , Phys. Rev. Lett. 88, 257001 (2002). [6] P. , Physica C 297, 12 (1998). J. Millis, to be published. TUNNELING SPECTRA NEAR Tc IN OVERDOPED Bi2 Sr2 CaCu2 O8+δ M. Oda, Y. Tanaka, A. Hashimoto, N. Momono and M. Ido Department of Physics, Hokkaido University, Sapporo 060-0810, Japan Abstract In this article, we focus on the dip structure of tunneling spectra in overdoped Bi2 Sr2 CaCu2 O8+δ (Bi2212), measured in Bi2212/vaccum/Bi2212 junctions, which are of the superconductor/insulator/superconductor (SIS) type below Tc .

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