Publications related to Topologically robust sound propagation in an angular-momentum-biased graphene-like resonator lattice

Superior robustness of anomalous non-reciprocal topological edge states

Romain Christophe Rémy Fleury, Zhechen Zhang, Pierre Delplace

Robustness against disorder and defects is a pivotal advantage of topological systems, manifested by the absence of electronic backscattering in the quantum-Hall and spin-Hall effects, and by unidirectional waveguiding in their classical analogues. Two-dim ...

2021

Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3: Toward intrinsic gap-tunability

Flaviano José Dos Santos, Xiao Wang

The bosonic analogs of topological insulators have been proposed in numerous theoretical works, but their experimental realization is still very rare, especially for spin systems. Recently, two-dimensional (2D) honeycomb van der Waals ferromagnets have eme ...

AMER ASSOC ADVANCEMENT SCIENCE2021

Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Gianmarco Gatti

Symmetry and topology are fundamental properties of nature. Mathematics provides us with a general framework to understand these concepts. On one side, symmetry describes the invariance properties of an object for specific transformations. On the other sid ...

EPFL2020

Emergence of Nontrivial Low-Energy Dirac Fermions in Antiferromagnetic EuCd2As2

Vladimir N. Strocov, Joël Mesot, Pierre Richard, Han Wang, Hang Li

Parity-time symmetry plays an essential role for the formation of Dirac states in Dirac semimetals. So far, all of the experimentally identified topologically nontrivial Dirac semimetals (DSMs) possess both parity and time reversal symmetry. The realizatio ...

WILEY-V C H VERLAG GMBH2020

Charge transport in proximitized graphene within van der Waals heterostructures

Katharina Polyudov

Since their discovery, graphene and other 2D materials have become a subject of intense research in condensed matter physics. Especially the vast possibilities of combining those materials into heterostructures are promising for the discovery of novel phys ...

EPFL2020

Measuring the Intra-Atomic Exchange Energy in Rare-Earth Adatoms

Harald Brune, François Patthey, Stefano Rusponi, Marina Pivetta

We present the first experimental determination of the intra-atomic exchange energy between the inner 4f and the outer 6s5d shells in rare-earth elements. Inelastic electron tunneling spectroscopy on individual rare-earth atoms adsorbed on metal-supported ...

AMER PHYSICAL SOC2020

Fully spin-polarized bulk states in ferroelectric GeTe

Jan Hugo Dil, Mauro Fanciulli

By measuring the spin polarization of GeTe films as a function of light polarization we observed that the bulk states are fully spin polarized in the initial state, in strong contrast with observations for other systems with a strong spin-orbit interaction ...

2020

Tilted double Dirac cone and anisotropic quantum-spin-Hall topological insulator in mechanical granular graphene

Romain Christophe Rémy Fleury, Georgios Theocharis

Dirac degeneracies are essential ingredients to control topological charge exchanges between bands and trigger the unique edge transport properties of topological materials. In addition, when Dirac cones are tilted, exotic phenomena can emerge such as anom ...

2020

A stability theory beyond the co-rotational setting for critical wave maps blow up

Joachim Krieger, Shuang Miao

We exhibit non-equivariant perturbations of the blowup solutions constructed in [18] for energy critical wave maps into

\mathbb{S}^2

. Our admissible class of perturbations is an open set in some sufficiently smooth topology and vanishes near the light co ...

2020

Emergent dual topology in the three-dimensional Kane-Mele Pt2HgSe3

Nicola Marzari, Marco Gibertini, Antimo Marrazzo

Recently, the very first large-gap Kane-Mele quantum spin Hall insulator was predicted to be monolayer jacutingaite (Pt2HgSe3), a naturally occurring exfoliable mineral discovered in Brazil in 2008. The stacking of quantum spin Hall monolayers into a van-d ...

AMER PHYSICAL SOC2020

Topologically robust sound propagation in an angular-momentum-biased graphene-like resonator lattice

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Superior robustness of anomalous non-reciprocal topological edge states

Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3: Toward intrinsic gap-tunability

Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Emergence of Nontrivial Low-Energy Dirac Fermions in Antiferromagnetic EuCd2As2

Charge transport in proximitized graphene within van der Waals heterostructures

Measuring the Intra-Atomic Exchange Energy in Rare-Earth Adatoms

Fully spin-polarized bulk states in ferroelectric GeTe

Tilted double Dirac cone and anisotropic quantum-spin-Hall topological insulator in mechanical granular graphene

A stability theory beyond the co-rotational setting for critical wave maps blow up

Emergent dual topology in the three-dimensional Kane-Mele Pt2HgSe3

Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Measuring the Intra-Atomic Exchange Energy in Rare-Earth Adatoms

Fully spin-polarized bulk states in ferroelectric GeTe

A stability theory beyond the co-rotational setting for critical wave maps blow up

Charge transport in proximitized graphene within van der Waals heterostructures

Superior robustness of anomalous non-reciprocal topological edge states

Tilted double Dirac cone and anisotropic quantum-spin-Hall topological insulator in mechanical granular graphene

Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3: Toward intrinsic gap-tunability

Emergence of Nontrivial Low-Energy Dirac Fermions in Antiferromagnetic EuCd2As2

Emergent dual topology in the three-dimensional Kane-Mele Pt2HgSe3