7 Result(s)
within
Zhao-Qing Zhang
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessFour-band non-Abelian topological insulator and its experimental realization
Very recently, increasing attention has been focused on non-Abelian topological charges, e.g., the quaternion group Q8. Different from Abelian topological band insulators, these systems involve multiple entangled...
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Article
Experimental observation of non-Abelian topological charges and edge states
In the last few decades, topological phase1–11 has emerged as a new classification of matter states beyond the Ginzburg–Landau symmetry-breaking paradigm. The underlying global invariant is usually well character...
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Article
Open AccessMetamaterials with index ellipsoids at arbitrary k-points
Propagation behaviors of electromagnetic waves are governed by the equifrequency surface of the medium. Up to now, ordinary materials, including the medium exist in nature and the man-made metamaterials, alway...
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Article
Open AccessA band of bound states in the continuum induced by disorder
Bound states in the continuum usually refer to the phenomenon of a single or a few discrete bound states embedded in a continuous spectrum of extended states. Here we propose a simple mechanism to achieve a ba...
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Article
Open AccessAnomalous Light Scattering by Topological PT-symmetric Particle Arrays
Robust topological edge modes may evolve into complex-frequency modes when a physical system becomes non-Hermitian. We show that, while having negligible forward optical extinction cross section, a conjugate p...
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Article
Open AccessSymmetry-protected transport in a pseudospin-polarized waveguide
If a system possesses a spin or pseudospin, which is locked to the linear momentum, spin-polarized states can exhibit backscattering-immune transport if the scatterer does not flip the spin. Good examples of s...
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Article
Open AccessDensity of States and Its Local Fluctuations Determined by Capacitance of Strongly Disordered Graphene
We demonstrate that fluctuations of the local density of states (LDOS) in strongly disordered graphene play an important role in determining the quantum capacitance of the top-gate graphene devices. Depending ...
