429 citations · 1.9k across the 29 of their papers we have counts for
28 papers
Vortex-enhanced photovoltaic current in disordered topological materials
Pavlo Sukhachov, Penghao Zhu, Ella Banyas +2
In disordered topological materials, real-space crystalline defects interplay with momentum-space wave function singularities to \textit{enhance} the bulk photovoltaic current. Wha…
Delicate Wannier insulators
Zoltán Guba, Aris Alexandradinata, Tomáš Bzdušek
The defining feature of topological insulators is that their valence states are not continuously deformable to a suitably defined atomic limit without breaking the symmetry or clos…
Anomalous shift and optical vorticity in the steady photovoltaic current
Penghao Zhu, A. Alexandradinata
Steady illumination of a non-centrosymmetric semiconductor results in a bulk photovoltaic current, which is contributed by real-space displacements (`shifts') of charged quasiparti…
Reply to: Low-frequency quantum oscillations in LaRhIn: Dirac point or nodal line?
Chunyu Guo, A. Alexandradinata, Carsten Putzke +16
We thank G.P. Mikitik and Yu.V. Sharlai for contributing this note and the cordial exchange about it. First and foremost, we note that the aim of our paper is to report a methodolo…
Quantization of intra- and inter-band Berry phases in the shift current
A. Alexandradinata
The theory of the shift current is thus far geometrical without being topological. This means that the real-space displacement/shift of a photoexcited quasiparticle depends on the…
Delicate topology protected by rotation symmetry: Crystalline Hopf insulators and beyond
Aleksandra Nelson, Titus Neupert, A. Alexandradinata +1
Pontrjagin's seminal topological classification of two-band Hamiltonians in three momentum dimensions is hereby enriched with the inclusion of a crystallographic rotational symmetr…
Diabolical touching point in the magnetic energy levels of topological nodal-line metals
Chong Wang, Zhongyi Zhang, Chen Fang +1
For three-dimensional metals, Landau levels disperse as a function of the magnetic field and the momentum wavenumber parallel to the field. In this two-dimensional parameter space,…
Quantized surface magnetism and higher-order topology: Application to the Hopf insulator
Penghao Zhu, Taylor L. Hughes, A. Alexandradinata
We identify topological aspects of the subextensive magnetic moment contributed by the surfaces of a three-dimensional crystallite -- assumed to be insulating in the bulk as well a…
Multicellularity of delicate topological insulators
Aleksandra Nelson, Titus Neupert, Tomáš Bzdušek +1
Being Wannierizable is not the end of the story for topological insulators. We introduce a family of topological insulators that would be considered trivial in the paradigm set by…
Teleportation of Berry curvature on the surface of a Hopf insulator
A. Alexandradinata, Aleksandra Nelson, Alexey A. Soluyanov
The existing paradigm for topological insulators asserts that an energy gap separates conduction and valence bands with opposite topological invariants. Here, we propose that \text…
Temperature dependence of quantum oscillations from non-parabolic dispersions
Chunyu Guo, A. Alexandradinata, Carsten Putzke +16
The phase offset of quantum oscillations is commonly used to experimentally diagnose topologically non-trivial Fermi surfaces. This methodology, however, is inconclusive for spin-o…
Crystallographic splitting theorem for band representations and fragile topological photonic crystals
A. Alexandradinata, J. Höller, Chong Wang +2
The fundamental building blocks in band theory are band representations (BRs): bands whose infinitely-numbered Wannier functions are generated (by action of a space group) from a f…
Quantized frequency-domain polarization of driven phases of matter
Ian Mondragon-Shem, Ivar Martin, A. Alexandradinata +1
Periodically driven quantum systems can realize novel phases of matter that do not exist in static settings. We study signatures of these drive-induced phases on the -dimens…
Landau quantization of nearly degenerate bands, and full symmetry classification of avoided Landau-level crossings
Chong Wang, Wenhui Duan, Leonid Glazman +1
Semiclassical quantization rules compactly describe the energy dispersion of Landau levels, and are predictive of quantum oscillations in transport and thermodynamic quantities. Su…
No-go theorem for topological insulators and sure-fire recipe for Chern insulators
A. Alexandradinata, J. Höller
For any symmorphic magnetic space group , it is proven that topological band insulators with vanishing first Chern numbers cannot have a groundstate composed of a single, energe…
Modern theory of magnetic breakdown
A. Alexandradinata, Leonid Glazman
The modern semiclassical theory of a Bloch electron in a magnetic field encompasses the orbital magnetization and geometric phase. Beyond this semiclassical theory lies the quantum…
Topological Bloch oscillations
J. Höller, A. Alexandradinata
Bloch oscillations originate from the translational symmetry of crystals. These oscillations occur with a fundamental period that a semiclassical wavepacket takes to traverse a Bri…
Topo-fermiology
A. Alexandradinata, Chong Wang, Wenhui Duan +1
The modern semiclassical theory of a Bloch electron in a magnetic field now encompasses the orbital magnetic moment and the geometric phase. These two notions are encoded in the Bo…
Double-Weyl phonons in transition-metal monosilicides
Tiantian Zhang, Zhida Song, A. Alexandradinata +4
Topological states of electrons and photons have attracted significant interest recently. Topological mechanical states also being actively explored, have been limited to macroscop…
Tilted Dirac Fermions
Lukas Muechler, Aris Alexandradinata, Titus Neupert +1
We introduce the notion of a band-inverted, topological semimetal in two-dimensional nonsymmorphic crystals. This notion is materialized in the monolayers of MTe (M W, Mo)…
A new form of (unexpected) Dirac fermions in the strongly-correlated cerium monopnictides
Nasser Alidoust, A. Alexandradinata, Su-Yang Xu +14
Discovering Dirac fermions with novel properties has become an important front in condensed matter and materials sciences. Here, we report the observation of unusual Dirac fermion…
Topological Insulators from Group Cohomology
A. Alexandradinata, Zhijun Wang, B. Andrei Bernevig
We classify insulators by generalized symmetries that combine space-time transformations with quasimomentum translations. Our group-cohomological classification generalizes the non…
Hourglass Fermions
Zhijun Wang, A. Alexandradinata, R. J. Cava +1
Spatial symmetries in crystals are distinguished by whether they preserve the spatial origin. We show how this basic geometric property gives rise to a new topology in band insulat…
Parafermionic phases with symmetry-breaking and topological order
A. Alexandradinata, N. Regnault, Chen Fang +2
Parafermions are the simplest generalizations of Majorana fermions that realize topological order. We propose a less restrictive notion of topological order in 1D open chains, whic…