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cond-mat.other2024
Topologically constrained obstructed atomic limits in quasi-one-dimensional systems
Milan Damnjanovic, Ivanka Milosevic
Possible forms of obstructed atomic limits in quasi-one-dimensional systems are studied using line group symmetry. This is accomplished by revisiting the standard theory with an em…
cond-mat.mtrl-sci2024
A polynomial GCD certificate for exact flat bands in finite-range Bloch Hamiltonians
Ivan Damnjanović, Milan Damnjanović, Ivanka Milošević +1
We formulate a polynomial GCD certificate for exact flat bands in finite-range periodic tight-binding Hamiltonians. Writing the characteristic polynomial of the Bloch Hamiltonian a…