72 citations · 247 across the 25 of their papers we have counts for
11 papers · 1 filter
The influence of quantum geometry on the phase boundary and collective excitations of electron liquids and crystals
Paul Froese, Mark R. Hirsbrunner, Yong Baek Kim
Recent experiments on multilayer graphene systems have reinvigorated the study of electron crystallization, now with the inclusion of quantum geometry. In this work, we apply time-…
Topological phonons in anomalous Hall crystals
Mark R. Hirsbrunner, Félix Desrochers, Joe Huxford +1
Recent experiments on few-layer graphene structures have reported indirect signatures of anomalous Hall crystals (AHCs), but the need for a top gate to stabilize the phase preclude…
Probing quantum geometry with two-dimensional nonlinear optical spectroscopy
Paul Froese, Mark R. Hirsbrunner, Yong Baek Kim
Recent studies have shown that the nonlinear optical response of crystalline systems is fundamentally a quantum geometric property. In this work, we propose two-dimensional coheren…
Quantized crystalline-electromagnetic responses in insulators
Sachin Vaidya, André Grossi Fonseca, Mark R. Hirsbrunner +2
We introduce new classes of gapped topological phases characterized by quantized crystalline-electromagnetic responses, termed "multipolar Chern insulators". These systems are char…
Anomalous crystalline-electromagnetic responses in semimetals
Mark R. Hirsbrunner, Oleg Dubinkin, Fiona J. Burnell +1
We present a unifying framework that allows us to study the mixed crystalline-electromagnetic responses of topological semimetals in spatial dimensions up to through dimens…
Crystalline-electromagnetic responses of higher order topological semimetals
Mark R. Hirsbrunner, Alexander D. Gray, Taylor L. Hughes
Previous work has shown that time-reversal symmetric Weyl semimetals with a quadrupolar arrangement of first-order Weyl nodes exhibit a mixed crystalline-electromagnetic response.…
Engineering ideal helical topological networks in stanene via Zn decoration
Jennifer Coulter, Mark R. Hirsbrunner, Oleg Dubinkin +2
The xene family of topological insulators plays a key role in many proposals for topological electronic, spintronic, and valleytronic devices. These proposals rely on applying loca…
Electric field effects on the band gap and edge states of monolayer 1T'-WTe2
Yulia Maximenko, Yueqing Chang, Guannan Chen +5
Monolayer 1T'-WTe2 is a quantum spin Hall insulator with a gapped bulk and gapless helical edge states persisting to temperatures around 100 K. Recent studies have revealed a topol…
Topology and Observables of the Non-Hermitian Chern Insulator
Mark R. Hirsbrunner, Timothy M. Philip, Matthew J. Gilbert
Topology plays a central role in nearly all disciplines of physics, yet its applications have so far been restricted to closed, lossless systems in thermodynamic equilibrium. Given…
Loss of Hall Conductivity Quantization in a Non-Hermitian Quantum Anomalous Hall Insulator
Timothy M. Philip, Mark R. Hirsbrunner, Matthew J. Gilbert
Recent work has extended topological band theory to open, non-Hermitian Hamiltonians, yet little is understood about how non-Hermiticity alters the topological quantization of asso…
Performance of Topological Insulator Interconnects
Timothy M. Philip, Mark R. Hirsbrunner, Moon Jip Park +1
The poor performance of copper interconnects at the nanometer scale calls for new material solutions for continued scaling of integrated circuits. We propose the use of three dimen…