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14 papers · 1 filter
Bi-collinear antiferromagnetic order in the tetragonal -FeTe
Fengjie Ma, Wei Ji, Jiangping Hu +2
By the first-principles electronic structure calculations, we find that the ground state of PbO-type tetragonal -FeTe is in a bi-collinear antiferromagnetic state, in which the…
The impedance-matched reduced acoustic cloaking with realizable mass and its layered design
Huan-Yang Chen, Tao Yang, Xu-Dong Luo +1
The authors present an impedance-matched reduced version of acoustic cloaking whose mass is in a reasonable range. A layered cloak design with isotropic material is also proposed f…
Antiferromagnetic superexchange interactions in LaOFeAs
Fengjie Ma, Zhong-Yi Lu, Tao Xiang
From first-principles calculations, we have studied the electronic and magnetic structures of the ground state of LaOFeAs. The Fe spins are found to be collinear antiferromagnetic…
Iron-based layered superconductor LaOFFeAs: an antiferromagnetic semimetal
Fengjie Ma, Zhong-Yi Lu
We have studied the newly found superconductor compound LaOFFeAs through the first-principles density functional theory calculations. We find that the parent compound L…
Raman and Infra-red properties and layer dependence of the phonon dispersions in multi-layered graphene
Jin-Wu Jiang, Hui Tang, Bing-Shen Wang +1
The symmetry group analysis is applied to classify the phonon modes of -stacked graphene layers (NSGL's) with AB- and AA-stacking, particularly their infra-red and Raman propert…
Dispersion and transitions of dipolar plasmon modes in graded plasmonic waveguides
J. J. Xiao, K. Yakubo, K. W. Yu
Coupled plasmon modes are studied in graded plasmonic waveguides, which are periodic chains of metallic nanoparticles embedded in a host with gradually varying refractive indices.…