Ames National Laboratory

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19922026

most citedDetermination of Effective Permittivity and Permeability of Metamaterials from Reflection and Transmission Coefficients

3k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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Showing 2012Show all

76 papers · 1 filter

cond-mat.mtrl-sci2012★ 11 cited

Electro-magnetostatic homogenization of bianisotropic metamaterials

Chris Fietz

We apply the method of asymptotic homogenization to metamaterials with microscopically bianisotropic inclusions to calculate a full set of constitutive parameters in the long wavel…

cond-mat.supr-con2012★ 26 cited

Hydrostatic and uniaxial pressure dependence of superconducting transition temperature of KFe2As2 single crystals

Sergey L. Bud'ko, Yong Liu, Thomas A. Lograsso +1

We present heat capacity, c-axis thermal expansion and pressure dependent, low field, temperature dependent magnetization for pressures up to ~ 12 kbar, data for KFe2As2 single cry…

cond-mat.supr-con2012★ 328 cited

A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2

K. Hashimoto, K. Cho, T. Shibauchi +14

In a superconductor, the ratio of the carrier density, $n$ , to their effective mass, $m^{*}$ , is a fundamental property directly reflecting the length scale of the superfluid flow, t…

cond-mat.supr-con2012★ 25 cited

Temperature-concentration phase diagram of (Ca1-xLax)10(Pt3As8)(Fe2As2)5 superconductors

N. Ni, W. E. Straszheim, D. J. Williams +6

Single crystals of (Ca1-xLax)10(Pt3As8)(Fe2As2)5 (x = 0 to 0.182) superconductors have been grown and characterized by X-ray, microprobe, transport and thermodynamic measurements.…

cond-mat.supr-con2012★ 15 cited

Vortex-induced strain and magnetization in type-II superconductors

V. G. Kogan

It is argued that the stress caused by vortex cores in the mixed state of superconductors may result in a field dependent contribution to the free energy and magnetization of measu…

cond-mat.str-el2012★ 7 cited

Anisotropic magnetization, resistivity and heat capacity of single crystalline R3Ni2-xSn7 (R = La, Ce, Pr and Nd)

Xiao Lin, Sergey L. Bud'ko, Srinivasa Thimmaiah +1

We present a detailed study of R3Ni2-xSn7 (R = La, Ce, Pr and Nd) single crystals by measurements of crystal structure, stoichiometry, temperature dependent magnetic susceptibility…

cond-mat.supr-con2012★ 137 cited

Anisotropic Impurity-States, Quasiparticle Scattering and Nematic Transport in Underdoped Ca(Fe1-xCox)2As2

M. P. Allan, T. -M. Chuang, F. Massee +9

Iron-based high temperature superconductivity develops when the `parent' antiferromagnetic/orthorhombic phase is suppressed, typically by introduction of dopant atoms. But their im…

cond-mat.str-el2012★ 41 cited

Antiferromagnetism in EuNiGe3

R. J. Goetsch, V. K. Anand, D. C. Johnston

The synthesis and crystallographic and physical properties of polycrystalline EuNiGe3 are reported. EuNiGe3 crystallizes in the noncentrosymmetric body-centered tetragonal BaNiSn3-…

cond-mat.str-el2012★ 77 cited

Magnetic field tuned quantum criticality of heavy fermion system YbPtBi

E. D. Mun, S. L. Bud'ko, C. Martin +8

In this paper, we present the systematic measurements of the temperature and magnetic field dependences of the thermodynamic and transport properties of the Yb-based heavy fermion…

physics.optics2012★ 345 cited

Electromagnetically Induced Transparency and Absorption in Metamaterials: The Radiating Two-Oscillator Model and Its Experimental Confirmation

Philippe Tassin, Lei Zhang, Rongkuo Zhao +3

Several classical analogues of electromagnetically induced transparency in metamaterials have been demonstrated. A simple two-resonator model can describe their absorption spectrum…

cond-mat.supr-con2012★ 48 cited

Hydrostatic-pressure tuning of magnetic, nonmagnetic and superconducting states in annealed Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$

E. Gati, S. Köhler, D. Guterding +6

We report on measurements of the magnetic susceptibility and electrical resistance under He-gas pressure on single crystals of Ca(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$ . We find that fo…

cond-mat.supr-con2012★ 30 cited

Inductances and attenuation constant for a thin-film superconducting coplanar waveguide resonator

John R. Clem

The geometric, kinetic, and total inductances and the attenuation constant are theoretically analyzed for a thin-film superconducting coplanar waveguide (CPW) resonator consisting…

cond-mat.str-el2012★ 51 cited

Evolution of magnetic oxygen states in Sr-doped LaCoO $_{3}$

S. Medling, Y. Lee, H. Zhang +4

Magnetism in La $_{1 - x}$ Sr $_{x}$ CoO $_{3}$ as a function of doping is investigated with X-ray absorption spectroscopy and X-ray magnetic circular dichroism at the O K edge, and correspon…

cond-mat.supr-con2012★ 7 cited

Magnetic and superconducting phase diagrams in ErNi2B2C

J. A. Galvis, M. Crespo, I. Guillamón +5

We present measurements of the superconducting upper critical field Hc2(T) and the magnetic phase diagram of the superconductor ErNi2B2C made with a scanning tunneling microscope (…

cond-mat.mtrl-sci2012★ 422 cited

A comparison of graphene, superconductors and metals as conductors for metamaterials and plasmonics

Philippe Tassin, Thomas Koschny, Maria Kafesaki +1

Recent advancements in metamaterials and plasmonics have promised a number of exciting applications, in particular at terahertz and optical frequencies. Unfortunately, the noble me…

cond-mat.str-el2012★ 9 cited

Checkerboard to Stripe Charge Ordering Transition in TbBaFe2O5

D. K. Pratt, S. Chang, W. Tain +6

A combined neutron and x-ray diffraction study of TbBaFe2O5 reveals a rare checkerboard to charge ordering transition. TbBaFe2O5 is a mixed valent compound where Fe2+/Fe3+ ions are…

cond-mat.str-el2012★ 20 cited

Impact of the various spin and orbital ordering processes on multiferroic properties of orthovanadate DyVO3

Q. Zhang, K. Singh, C. Simon +3

The orthovanadate DyVO3 crystal, known to exhibit multiple structural, spin and orbital ordering transitions, is presently investigated on the basis of magnetization, heat capacity…

physics.optics2012★ 78 cited

Effective material parameter retrieval for thin sheets: theory and application to graphene, thin silver films, and single-layer metamaterials

Philippe Tassin, Thomas Koschny, Costas M. Soukoulis

An important tool in the field of metamaterials is the extraction of effective material parameters from simulated or measured scattering parameters of a sample. Here we discuss a r…

physics.optics2012★ 43 cited

Optical metamaterials with different metals

Nian-Hai Shen, Thomas Koschny, Maria Kafesaki +1

We investigate the influence of different metals on the electromagnetic response of fishnet metamaterials in the optical regime.We found, instead of using a Drude model, metals wit…

physics.optics2012★ 7 cited

Discontinuous design of negative index metamaterials based on mode hybridization

Nian-Hai Shen, Lei Zhang, Thomas Koschny +3

An electric inductor-capacitor (ELC) resonator provides a series of electrical resonances and a pair of ELC resonators leads to the split of each resonance into two modes, i.e., ma…

cond-mat.supr-con2012★ 1 cited

Field Dependence of the Superconducting Basal Plane Anisotropy of TmNi2B2C

P. Das, J. M. Densmore, C. Rastovski +7

The superconductor TmNi2B2C possesses a significant four-fold basal plane anisotropy, leading to a square Vortex Lattice (VL) at intermediate fields. However, unlike other members…

cond-mat.stat-mech2012★ 1 cited

Least square based method for obtaining one particle spectral functions from temperature Green functions

Jun Liu

A least square based fitting scheme is proposed to do analytic continuation on one particle temperature Green function.