Phononic Weyl nodal straight lines in MgB2
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DOI: 10.1103/physrevb.101.024301
Abstract: Based on first-principles calculations, we predict that the superconductor ${\mathrm{MgB}}_{2}$ with an ${\mathrm{AlB}}_{2}$-type centrosymmetric lattice hosts the so-called phononic topological Weyl nodal lines (PTWNLs) in its bulk phonon spectrum. These PTWNLs can be viewed as… read more here.
Keywords: weyl; weyl nodal; straight lines; lines mgb2 ... See more keywords
Limit Cycles of Planar Piecewise Differential Systems with Linear Hamiltonian Saddles
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DOI: 10.3390/sym13071128
Abstract: We provide the maximum number of limit cycles for continuous and discontinuous planar piecewise differential systems formed by linear Hamiltonian saddles and separated either by one or two parallel straight lines. We show that when… read more here.
Keywords: straight lines; line; differential systems; limit cycles ... See more keywords