Showing 2009 · cond-mat.supr-conShow all

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cond-mat.supr-con2009★ 3 cited

Disorder Induced Effects on the Critical Current Density of Iron Pnictide BaFe_1.8 Co_0.2 As_2 single crystals

M. Zehetmayer, M. Eisterer, H. W. Weber +6

Investigating the role of disorder in superconductors is an essential part of characterizing the fundamental superconducting properties as well as assessing potential applications…

cond-mat.supr-con2009★ 78 cited

Suppression of the critical temperature of superconducting NdFeAs(OF) single crystals by Kondo-like defect sites induced by alpha-particle irradiation

C. Tarantini, M. Putti, A. Gurevich +8

We report a comprehensive investigation of the suppression of the critical temperature Tc of NdFeAs(OF) single crystal by alpha-particle irradiation. Our data indicate that irradia…

cond-mat.supr-con2009★ 302 cited

New Fe-based superconductors: properties relevant for applications

M Putti, I Pallecchi, E Bellingeri +23

Less than two years after the discovery of high temperature superconductivity in oxypnictide LaFeAs(O,F) several families of superconductors based on Fe layers (1111, 122, 11, 111)…

cond-mat.supr-con2009★ 44 cited

Development of high critical current density in multifilamentary round-wire Bi2Sr2CaCu2O8+x by strong overdoping

T. Shen, J. Jiang, A. Yamamoto +4

Bi2Sr2CaCu2O8+x is the only cuprate superconductor that can be made into a round-wire conductor form with a high enough critical current density Jc for applications. Here we show t…

cond-mat.supr-con2009★ 203 cited

Template engineering of Co-doped BaFe2As2 single-crystal thin films

S. Lee, J. Jiang, C. T. Nelson +14

Understanding new superconductors requires high-quality epitaxial thin films to explore intrinsic electromagnetic properties, control grain boundaries and strain effects, and evalu…

cond-mat.supr-con2009★ 13 cited

Zooming on the Quantum Critical Point in Nd-LSCO

Olivier Cyr-Choinière, R. Daou, J. Chang +10

Recent studies of the high-Tc superconductor La_(1.6-x)Nd_(0.4)Sr_(x)CuO_(4) (Nd-LSCO) have found a linear-T in-plane resistivity rho_(ab) and a logarithmic temperature dependence…

cond-mat.supr-con2009★ 14 cited

Hyperfine fields and magnetic structure in the B phase of CeCoIn5

Nicholas J. Curro, Ben-Li Young, Ricardo Urbano +1

We re-analyze Nuclear Magnetic Resonance (NMR) spectra observed at low temperatures and high magnetic fields in the field-induced B-phase of CeCoIn5. The NMR spectra are consistent…

cond-mat.supr-con2009★ 2 cited

Relaxation of Nuclear Magnetic Moments and Site-Selective NMR in d-Wave Superconductors

Robert E. Throckmorton, Oskar Vafek

A new mechanism for relaxing the nuclear magnetic moments, in which a pair of spin-polarized BCS quasiparticles is emitted or absorbed, and which dominates at low temperature, is i…

cond-mat.supr-con2009★ 35 cited

Measurement of the nonlinear Meissner effect in superconducting Nb films using a resonant microwave cavity: A probe of unconventional pairing symmetries

N. Groll, A. Gurevich, I. Chiorescu

We report observation of the nonlinear Meissner effect (NLME) in Nb films by measuring the resonance frequency of a planar superconducting cavity as a function of the magnitude and…

cond-mat.supr-con2009★ 76 cited

Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide

F. Kametani, P. Li, D. Abraimov +11

We report a direct current transport study of the local intergrain connections in a polycrystalline SmFeAsO0.85 (Sm1111) bulk, for which we earlier estimated significant intergranu…

cond-mat.supr-con2009★ 30 cited

Disorder effects on the superconducting properties of BaFeCoAs single crystals

M. Eisterer, M. Zehetmayer, H. W. Weber +4

Single crystals of superconducting BaFeCoAs were exposed to neutron irradiation in a fission reactor. The introduced defects decrease the superconducting transi…

cond-mat.supr-con2009★ 173 cited

Weak-link behavior of grain boundaries in superconducting Ba(Fe1-xCox)2As2 bicrystals

S. Lee, J. Jiang, J. D. Weiss +17

We show that despite the low anisotropy, strong vortex pinning and high irreversibility field Hirr close to the upper critical field Hc2 of Ba(Fe1-xCox)2As2, the critical current d…

cond-mat.supr-con2009★ 35 cited

Tracking anisotropic scattering in overdoped TlBaCuO above 100 K

M. M. J. French, J. G. Analytis, A. Carrington +2

This article describes new polar angle-dependent magnetoresistance (ADMR) measurements in the overdoped cuprate TlBaCuO over an expanded range of temperatures and a…

cond-mat.supr-con2009★ 23 cited

Magnetic characterization of undoped and 15%F doped LaFeAsO and SmFeAsO compounds

M. R. Cimberle, F. Canepa, M. Ferretti +6

In this paper the magnetic behaviour of undoped and 15% F doped SmFeAsO (Sm-1111) and LaFeAsO (La-1111) samples is presented and discussed. Magnetization measurements are not a sim…

cond-mat.supr-con2009★ 29 cited

Effect of the chemical pressure on superconductivity and SDW in undoped and 15%F doped La1-yYyFeAsO compounds

M. Tropeano, C. Fanciulli, F. Canepa +7

We present a study concerning the partial substitution of yttrium at the lanthanum site of the undoped LaFeAsO and superconducting LaFeAsO0.85F0.15 compounds. We prepared samples w…

cond-mat.supr-con2009★ 38 cited

Universal Behavior and the Two-component Character of Magnetically Underdoped Cuprate Superconductors

Victor Barzykin, David Pines

We present a detailed review of scaling behavior in the magnetically underdoped cuprate superconductors (hole dopings less than 0.20) and show that it reflects the presence of two…

cond-mat.supr-con2009★ 8 cited

Detection of Striped Superconductors Using Magnetic Field Modulated Josephson Effect

Kun Yang

In a very interesting recent Letter\cite{berg}, the authors suggested that a novel form of superconducting state is realized in LaBaCuO with close to 1/8. This…

cond-mat.supr-con2009★ 37 cited

High-field phase-diagram of Fe arsenide superconductors

Y. J. Jo, J. Jaroszynski, A. Yamamoto +13

Here, we report an overview of the phase diagram of single layered and double layered Fe arsenide superconductors at high magnetic fields. Our systematic magnetotransport measureme…