Improved instrumental techniques, including isotopic analysis, applicable to the characterization of unusual materials with potential relevance to aerospace forensics
The problem of precise characterization, analysis, and eventual identification of unknown
materials arises in many fields and takes many forms, depending on the nature of the …
materials arises in many fields and takes many forms, depending on the nature of the …
Interacting topological quantum chemistry in 2D with many-body real space invariants
The topological phases of non-interacting fermions have been classified by their
symmetries, culminating in a modern electronic band theory where wavefunction topology …
symmetries, culminating in a modern electronic band theory where wavefunction topology …
Effective action approach to the filling anomaly in crystalline topological matter
In two dimensions, magnetic higher-order topological insulators (HOTIs) are characterized
by excess boundary charge and a compensating bulk “filling anomaly.” At the same time …
by excess boundary charge and a compensating bulk “filling anomaly.” At the same time …
Higher Berry phase of fermions and index theorem
A bstract When a quantum field theory is trivially gapped, its infrared fixed point is an
invertible field theory. The partition function of the invertible field theory records the response …
invertible field theory. The partition function of the invertible field theory records the response …
Crystalline responses for rotation-invariant higher-order topological insulators
J May-Mann, TL Hughes - Physical Review B, 2022 - APS
Two-dimensional higher-order topological insulators can display a number of exotic
phenomena, such as half-integer charges localized at both corners and disclination defects …
phenomena, such as half-integer charges localized at both corners and disclination defects …
[HTML][HTML] Field theory of higher-order topological crystalline response, generalized global symmetries and elasticity tetrads
J Nissinen - Annals of Physics, 2022 - Elsevier
I discuss aspects of higher-order topological field theory of crystalline insulators with no
other symmetries. I show how the topology and geometry of the crystalline lattice is …
other symmetries. I show how the topology and geometry of the crystalline lattice is …
Topological field theories of three-dimensional rotation symmetric insulators: Coupling curvature and electromagnetism
Quantized responses are important tools for understanding and characterizing the universal
features of topological phases of matter. In this work, we show that three-dimensional (3 D) …
features of topological phases of matter. In this work, we show that three-dimensional (3 D) …
Topological invariants beyond symmetry indicators: Boundary diagnostics for twofold rotationally symmetric superconductors
Topological crystalline superconductors are known to have possible higher-order topology,
which results in Majorana modes on d− 2 or lower-dimensional boundaries. Given the rich …
which results in Majorana modes on d− 2 or lower-dimensional boundaries. Given the rich …
Classification of interacting dirac semimetals
Topological band theory predicts a Z classification of three-dimensional (3D) Dirac
semimetals (DSMs) at the single-particle level. Namely, an arbitrary number of identical bulk …
semimetals (DSMs) at the single-particle level. Namely, an arbitrary number of identical bulk …
Emergent geometry, torsion and anomalies in non-relativistic topological matter
J Nissinen - Journal of Physics: Conference Series, 2023 - iopscience.iop.org
I review and discuss aspects of the interplay of emergent geometry and anomalies in
topological semimetals and insulators, focusing on effects of torsion. This correspondence …
topological semimetals and insulators, focusing on effects of torsion. This correspondence …