The Ginzburg Landau theory for dx2-y2-wave superconductors is constructed, by starting from the Gor'kov equation with including correction terms up to the next order of ln(Tc/T). Some of the…
NENaoki Enomoto, Masanori Ichioka, Kazushige Machida
Superconductivity papers
supr-conLatest research in Superconductivity
Density of States and NMR Relaxation Rate in Anisotropic Superconductivity with Intersecting Line Nodes
supr-conWe show that the density of states in an anisotropic superconductor with intersecting line nodes in the gap function is proportional to E log (α 0 /E) for |E| << 0, where…
YHYasumasa HasegawaThe vortex contribution to the dc field (H) dependent microwave surface impedance Zs = Rs+iXs of YBa2Cu3O7-x thin films was measured using suspended patterned resonators. Zs(H) is shown to…
BWBalam A. Willemsen, J. S. Derov, S. SridharThe non-linear microwave surface impedance of patterned YBCO thin films, was measured using a suspended line resonator in the presence of a perpendicular DC magnetic field of magnitude comparable to…
DCDurga P. Choudhury, Balam A. Willemsen, John S. Derov, S. SridharOn the origin of the irreversibility line in thin YBaCuO7 films with and without columnar defects
supr-conWe report on measurements of the angular dependence of the irreversibility temperature Tirr(θ) in YBa2Cu3O7-δ thin films, defined by the onset of a third harmonic signal and…
RPR. Prozorov, M. Konczykowski, B. Schmidt, Y. Yeshurun et al.The Fluctuation Induced Pseudogap in the Infrared Optical Conductivity of High Temperature Superconductors
supr-conWe study the effect of fluctuations on the ac conductivity of a layered superconductor both for c-axis and ab-plane electromagnetic wave polarizations. The fluctuation contributions of…
FFFrancesca Federici, Andrei A. VarlamovStrong coupling theory of the interlayer tunneling model for high temperature superconductors
supr-conThe interlayer pair tunneling model of Anderson et al. is generalized to include the strong coupling effects associated with in-plane interactions. The equations for the superconducting transition…
BMB. Mitrovic, M. CastleI argue that the ``gap'' recently observed at the Brillouin zone face of cuprate superconductors in photoemission by Marshall et al [Phys. Rev. Lett. 76, 4841 (1996)] and Ding et al [Nature 382, 54…
RLR. B. LaughlinGinzburg-Landau-Gor'kov Theory of Magnetic oscillations in a type-II 2-dimensional Superconductor
supr-conWe investigate de Haas-van Alphen (dHvA) oscillations in the mixed state of a type-II two-dimensional superconductor within a self-consistent Gor'kov perturbation scheme. Assuming that the order…
GBG. M. Bruun, V. N. Nicopoulos, N. F. JohnsonThe high-Tc cuprates are possible candidates for d-wave superconductivity, with the Cooper pair wave function belonging to a non-trivial irreducible representation of the lattice point group. We…
ABA. S. Blaer, H. C. Ren, O. Tchernyshyovc-Axis Infrared Conductivity of a dx2-y2-Wave Superconductor with Impurity and Spin-Fluctuation Scattering
supr-conResults of a calculation of the c-axis infrared conductivity sigmac for a dx2-y2-wave superconductor which include both elastic impurity and inelastic spin-fluctuation scattering are presented…
PHP. J. Hirschfeld, S. M. Quinlan, D. J. ScalapinoThis is an analytic study of the problem of transitions between normal and superconducting phases for a sample which encloses a magnetic flux. A preliminary study of this problem, based on numerical…
JBJorge Berger, Jacob RubinsteinThe bias-dependent resistance R(V) of NS-junctions is calculated using the Keldysh formalism in all orders of the transfer matrix element. We present a compact and simple formula for the Andreev…
FAF. B. Anders, K. GloosWe investigate numerically the dynamically generated plastic deformations of a 3D vortex lattice (VL) driven through a disorder potential with isolated, strong pinning centers (point-like or extended…
ASA. Schönenberger, A. Larkin, E. Heeb, V. Geshkenbein et al.Spatio-temporal dynamics and plastic flow of vortices in superconductors with periodic arrays of pinning sites
supr-conWe present simulations of flux-gradient-driven superconducting rigid vortices interacting with square and triangular arrays of columnar pinning sites in an increasing external magnetic field. These…
CRC. Reichhardt, J. Groth, C. J. Olson, Stuart Field et al.Recently, Mun et.al. (Phys. Rev. Lett., 76, 2790 (1996)) have published their results on single crystal YNi2B2C, claiming that their experimental observations can be explained in terms of formation…
SSS. Sridhar, S. Oxx, B. A. Willemsen, H. Srikanth et al.The flux flow regime of high-T c samples of different normal state resistivities is studied in the temperature range where the sign of the Hall effect is reversed. The scaling of the vortex…
JMJ. I. Martin, M. Velez, F. Guinea, J. L. VicentA theoretical model of high-Tc Josephson Field Effect Transistors (JoFETs) based on a Ginzburg-Landau free energy expression whose parameters are field- and spatially- dependent is developed. This…
JBJ. J. Betouras, R. Joynt, Z. -W. Dong, T. Venkatesan et al.In previous work on quantum phase transition in granular superconductors, where mean-field theory was used, an assumption was made that the order parameter as a function of the mean field is a convex…
MSM. V. SimkinLocal magnetic relaxation measurements in YBa2Cu3O7-x crystals show evidence for plastic vortex-creep associated with the motion of dislocations in the vortex lattice. This creep mechanism…
YAY. Abulafia, A. Shaulov, Y. Wolfus, R. Prozorov et al.The electronic structure of vortices in a type II superconductor is analyzed within the quasi-classical Eilenberger framework. The possible origin of a sixfold ``star'' shape of the local density of…
NHN. Hayashi, M. Ichioka, K. MachidaThe superconductive phase transition in the Ginzburg-Landau theory (or Coulomb-Higgs phase transition of scalar QED in 3D) is discussed in a dual formulation which focuses on the magnetic rather than…
HKHagen Kleinert, Adriaan SchakelWe investigate by numerical simulations the behavior of the power dissipated in a resistive load capacitively coupled to a Josephson flux flow oscillator and compare the results to those obtained for…
CSC. Soriano, G. Costabile, R. D. ParmentierThe magnetization M of a thin YBaCuO film is measured as a function of the angle θ between the applied field H and the c-axis. For fields above the first critical field, but below the Bean's…
RPR. Prozorov, A. Poddar, E. Sheriff, A. Shaulov et al.Low temperature thermal conductivity of Zn-doped YBCO: evidence for impurity-induced electronic bound states
supr-conThe thermal conductivity of Zn-doped YBCO crystals was studied at low temperature (0.15 < T < 0.8 K) for different concentrations of Zn impurities. A small amount of Zn induces a dramatic decrease in…
KBK. Behnia, H. Aubin, L. Taillefer, R. Gagnon