251 citations · 1.4k across the 28 of their papers we have counts for
14 papers · 1 filter
Flux-tunable global and local superconductivity in a topological insulator nano-SQUID
Ella Nikodem, Jakob Schluck, Michał Papaj +5
Topological systems are defined by global properties that enforce the existence of local boundary modes. Three-dimensional topological insulators (TIs) were among the earliest prop…
Topological Insulator nano-SQUID: Flux-tunable platform for topological superconductivity
Ella Nikodem, Jakob Schluck, Henry F. Legg +5
Many efforts have been made in the past decade to realize topological superconductivity using superconducting proximity effect, but an ideal platform is still lacking. A 3D topolog…
Visualizing structure of correlated ground states using collective charge modes
Michał Papaj, Guangxin Ni, Cyprian Lewandowski
The variety of correlated phenomena in moiré systems is incredibly rich, spanning effects such as superconductivity, a generalized form of ferromagnetism, or even charge fractional…
Spectroscopic signatures of excitonic order effect on quantum spin Hall edge states
Michał Papaj
One of the proposed ground states of monolayer WTe, a two-dimensional topological insulator, is an excitonic condensate. However, time-reversal preserving and breaking solution…
Breakdown of helical edge state topologically protected conductance in time-reversal-breaking excitonic insulators
Yan-Qi Wang, Michał Papaj, Joel E. Moore
Gapless helical edge modes are a hallmark of the quantum spin Hall effect. Protected by time-reversal symmetry, each edge contributes a quantized zero-temperature conductance quant…
Probing correlated states with plasmonic origami
Michał Papaj, Cyprian Lewandowski
Understanding the nature of strongly correlated states in flat-band materials (such as moiré heterostructures) is at the forefront of both experimental and theoretical pursuits. Wh…
Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials
Michał Papaj, Liang Fu
We analyze the thermoelectric response of Dirac and Weyl semimetals using the semiclassical approach, focusing on the extrinsic contributions due to skew-scattering and side jump.…
Plasmonic nonreciprocity driven by band hybridization in moiré materials
Michał Papaj, Cyprian Lewandowski
We propose a new current-driven mechanism for achieving significant plasmon dispersion nonreciprocity in systems with narrow, strongly hybridized electron bands. The magnitude of t…
Creating Majorana modes from segmented Fermi surface
Michał Papaj, Liang Fu
We present a new platform for creating Majorana bound states from 2D gapless superconducting state in spin-helical systems under the in-plane Zeeman field. Topological 1D channels…
Magnus Hall Effect
Michał Papaj, Liang Fu
A new type of linear response Hall effect is predicted in time-reversal-invariant systems with built-in electric field at zero magnetic field. The Hall response results from a quan…
Multichannel charge Kondo effect and non-Fermi liquid fixed points in conventional and topological superconductor islands
Michał Papaj, Zheng Zhu, Liang Fu
We study multiterminal Majorana and conventional superconducting islands in the vicinity of the charge degeneracy point using bosonization and numerical renormalization group. Both…
Conductance oscillations in quantum point contacts of InAs/GaSb heterostructures
Michał Papaj, Łukasz Cywiński, Jerzy Wróbel +1
We study quantum point contacts in two-dimensional topological insulators by means of quantum transport simulations for InAs/GaSb heterostructures and HgTe/(Hg,Cd)Te quantum wells.…
Suspended graphene devices with local gate control on an insulating substrate
Florian R. Ong, Zheng Cui, Muhammet A. Yurtalan +6
We present a fabrication process for graphene-based devices where a graphene monolayer is suspended above a local metallic gate placed in a trench. As an example we detail the fabr…
Designing quantum dots for solotronics
J. Kobak, T. Smoleński, M. Goryca +11
Solotronics, optoelectronics based on solitary dopants, is an emerging field of research and technology reaching the ultimate limit of miniaturization. It aims at exploiting quantu…