635 citations
- University of the Basque CountryES16 papers
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12 papers · 1 filter
The equivalence between doubly nonnegative relaxation and semidefinite relaxation for binary quadratic programming problems
Chuan-Hao Guo, Yan-Qin Bai, Li-Ping Tang
It has recently been shown (Burer, Math. Program Ser. A 120:479-495, 2009) that a large class of NP-hard nonconvex quadratic programming problems can be modeled as so called comple…
Thickness-dependent polarization of strained BiFeO3 films with constant tetragonality
J. E. Rault, W. Ren, S. Prosandeev +7
We measure the remnant polarization of ferroelectric domains in BiFeO3 films down to 3.6 nm using low energy electron and photoelectron emission microscopy. The measured polarizati…
Double-periodic quasi-periodic graphene superlattice: non-Bragg band gap and electronic transport
Xi Chen, Pei-Liang Zhao, Qi-Biao Zhu
Electronic band gap and transport in quasi-periodic graphene superlattice of double-periodic sequence have been investigated. It is found that such quasi-periodic structure can pos…
d-Wave holographic superconductors with backreaction in external magnetic fields
Xian-Hui Ge, Shao Fei Tu, Bin Wang
We study the d-wave holographic superconductors (the d-wave model proposed in [arXiv:1003.2991[hep-th]]) immersed in constant external magnetic fields by using the analytic matchin…
Optical absorption of silicon nanowires
Tao Xu, Yannick Lambert, Christophe Krzeminski +6
We report on simulations and measurements of the optical absorption of silicon nanowires (NWs) versus their diameter. We first address the simulation of the optical absorption base…
Fast and robust spin manipulation in a quantum dot by electric fields
Yue Ban, Xi Chen, E. Ya Sherman +1
We apply an invariant-based inverse engineering method to control by time-dependent electric fields electron spin dynamics in a quantum dot with spin-orbit coupling in a weak magne…