Showing 2013 · cond-mat.supr-conShow all

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cond-mat.supr-con2013★ 21 cited

Multigap superconductivity in locally non-centrosymmetric SrPtAs: An As nuclear quadrupole resonance investigation

F. Brückner, R. Sarkar, M. Günther +9

We report detailed As-NQR investigations of the locally non-centrosymmetric superconductor SrPtAs. The spin-lattice relaxation studies prove weakly coupled multi-gap superco…

cond-mat.supr-con2013★ 25 cited

Excitonic and superconducting orders from repulsive interaction on the doped honeycomb bilayer

James M. Murray, Oskar Vafek

Using a weak-coupling renormalization group formalism, we study competing ordered phases for repulsively interacting fermions on the bilayer honeycomb lattice away from half-fillin…

cond-mat.supr-con2013★ 39 cited

Enhanced Upper Critical Fields in a New Quasi-one-dimensional Superconductor Nb2PdxSe5

Seunghyun Khim, Bumsung Lee, Ki-Young Choi +9

We report a discovery of superconductivity with Tc = 5.5 K in Nb2PdxSe5, in which one-dimensional (1D) Nb-Se chains existing along the b-direction hybridize each other to form the…

cond-mat.supr-con2013

Two regimes in conductivity and the Hall coefficient of underdoped cuprates in strong magnetic fields

Lev P. Gor'kov, Gregory B. Teitel'baum

We address recent experiments shedding light on the energy spectrum of under- and optimally doped cuprates at temperatures above superconducting transition. Angle resolved photoemi…

cond-mat.supr-con2013★ 44 cited

Examination of the tradeoff between intrinsic and extrinsic properties in the optimization of a modern internal tin Nb3Sn conductor

C. Tarantini, P. J. Lee, N. Craig +2

In modern Nb3Sn wires there is a fundamental compromise to be made between optimizing the intrinsic properties associated with the superfluid density in the A15 phase (e.g. Tc, Hc,…

cond-mat.supr-con2013★ 14 cited

Small and nearly isotropic hole-like Fermi surfaces in LiFeAs detected through de Haas van Alphen-effect

B. Zeng, D. Watanabe, Q. R. Zhang +8

LiFeAs is unique among the arsenic based Fe-pnictide superconductors because it is the only nearly stoichiometric compound which does not exhibit magnetic order. This is at odds wi…

cond-mat.supr-con2013★ 25 cited

Bulk evidence for a time reversal symmetry broken superconducting state in URu2Si2

G. Li, Q. Zhang, D. Rhodes +8

URuSi is claimed to be a chiral \emph{d}-wave superconductor with a time-reversal symmetry broken orbital component for the Cooper pair wave-function,…

cond-mat.supr-con2013★ 14 cited

Effect of heavy-ion irradiation on London penetration depth in over-doped Ba(Fe,Co)2As2

J. Murphy, M. A. Tanatar, Hyunsoo Kim +7

Irradiation with 1.4 GeV Pb ions was used to induce artificial disorder in single crystals of iron-arsenide superconductor Ba(FeCo)As and to study its e…

cond-mat.supr-con2013★ 14 cited

Unconventional superconductivity in a two-dimensional repulsive gas of fermions with spin-orbit coupling

Luyang Wang, Oskar Vafek

We investigate the superconducting instability of a two-dimensional repulsive fermion gas with Rashba spin-orbit coupling $\al_R$. Using renormalization group approach, we find the…

cond-mat.supr-con2013★ 81 cited

Artificially engineered superlattices of pnictide superconductor

S. Lee, C. Tarantini, P. Gao +9

Significant progress has been achieved in fabricating high quality bulk and thinfilm iron-based superconductors. In particular, artificial layered pnictide superlattices offer the…

cond-mat.supr-con2013★ 35 cited

Progressive slowing down of spin fluctuations in underdoped LaFeAsOF

F. Hammerath, U. Gräfe, H. Kühne +7

The evolution of low-energy spin dynamics in the iron-based superconductor LaFeAsOF was studied over a broad doping, temperature, and magnetic field range (x = 0 - 0.15…

cond-mat.supr-con2013★ 239 cited

Emergence of charge order from the vortex state of a high temperature superconductor

T. Wu, H. Mayaffre, S. Kramer +8

Evidence is mounting that charge order competes with superconductivity in high Tc cuprates. Whether this has any relationship to the pairing mechanism is unknown since neither the…

cond-mat.supr-con2013★ 46 cited

Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications

Kazumasa Iida, Jens Haenisch, Chiara Tarantini +10

The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most attractive material among the Fe-based superconductors due to its highest transition temperature of 56 K…

cond-mat.supr-con2013★ 49 cited

Axionic superconductivity in three dimensional doped narrow gap semiconductors

Pallab Goswami, Bitan Roy

We consider the competition between the conventional s-wave and the triplet Balian-Werthamer or the B-phase pairings in the doped three dimensional narrow gap semiconductors, such…

cond-mat.supr-con2013★ 28 cited

Anomalous metallic state and anisotropic multiband superconductivity in Nb3Pd0.7Se7

Q. Zhang, D. Rhodes, B. Zeng +4

We report the discovery of superconductivity in NbPdSe with a -dependent superconducting transition-temperature as high as K for (m…

cond-mat.supr-con2013★ 9 cited

Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe_{1.84}Co_{0.16}As_2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe_2As_2 pnictide

Andrea Perucchi, Leonetta Baldassarre, Boby Joseph +7

Here we report an optical investigation in the terahertz region of a 40 nm ultrathin BaFeCoAs superconducting film with superconducting transition temperature…

cond-mat.supr-con2013★ 50 cited

Mechanochemical synthesis of pnictide compounds and superconducting Ba0.6K0.4Fe2As2 bulks with high critical current density

J. D. Weiss, J. Jiang, A. A. Polyanskii +1

BaFe2As2 (Ba-122) and (Ba0.6K0.4)Fe2As2 (K-doped Ba-122) powders were successfully synthesized from the elements using a reaction method, which incorporates a mechanochemical react…

cond-mat.supr-con2013★ 8 cited

Superconducting anisotropy in the electron-doped high-T superconductors PrCeCuO

Guoqing Wu, R. L. Greene, A. P. Reyes +5

We report superconducting anisotropy measurements in the electron-doped high- superconductors (HTSCs) PrCeCuO (PCCO, = 0.15 and 0.17) with applied…

cond-mat.supr-con2013★ 12 cited

Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films

Xiaoxiang Xi, J. -H. Park, D. Graf +2

The vortex-state electrodynamics of s-wave superconductors has been studied by infrared spectroscopy. Far-infrared transmission and reflection spectra of superconducting NbTiN and…

cond-mat.supr-con2013★ 67 cited

Superconductivity with extremely large upper critical fields in Nb2Pd0.81S5

Q. Zhang, G. Li, D. Rhodes +7

Here, we report the discovery of superconductivity in a new transition metal-chalcogenide compound, i.e. Nb2Pd0.81S5, with a transition temperature Tc > 6.6 K. Despite its relative…

cond-mat.supr-con2013★ 3 cited

Vortex lock-in transition and evidence for transitions among commensurate kinked vortex configurations in single-layered Fe arsenides

G. Li, G. Grissonnanche, B. S. Conner +7

We report an angle-dependent study of the magnetic torque within the vortex state of single-crystalline LaOFFeAs and SmOFFeAs as a function o…

cond-mat.supr-con2013★ 25 cited

Angular-dependent upper critical field of overdoped Ba(FeNi)As

J. Murphy, M. A. Tanatar, D. Graf +5

In-plane resistivity measurements as a function of temperature, magnetic field and its orientation with respect to the crystallographic plane were used to study the upper crit…

cond-mat.supr-con2013★ 60 cited

Reduction of gas bubbles and improved critical current density in Bi-2212 round wire by swaging

Jianyi Jiang, Hanping Miao, Yibing Huang +8

Bi-2212 round wire is made by the powder-in-tube technique. An unavoidable property of powder-in-tube conductors is that there is about 30% void space in the as-drawn wire. We have…

cond-mat.supr-con2013★ 13 cited

Quantum oscillations of the specific heat in d-wave superconductors with loop current order

Luyang Wang, Oskar Vafek

We report numerical results of quantum oscillations of the specific heat in the vortex state of a -wave superconductor in the presence of loop current order, which giv…