251 citations · 1.4k across the 28 of their papers we have counts for
28 papers
Controlling Intertwined Electronic Orders in FeSe with Exfoliation
Wenyao Liu, Gabriel Natale, Kyung-Mo Kim +14
Controlling intertwined electronic orders in two-dimensional superconductors offers an effective route to answering fundamental questions and engineering new quantum devices. Howev…
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…
Excitonic order in quantum materials: fingerprints, platforms and opportunities
Yande Que, Clara Rebanal, Liam Watson +4
The exciton insulator (EI) is a unique many-body ground state of condensed, spontaneously formed excitons (electron-hole pairs) in equilibrium, distinct from conventional band or M…
Pair density modulation from glide symmetry breaking and nematic superconductivity
Michał Papaj, Lingyuan Kong, Stevan Nadj-Perge +1
Pair density modulation is a superconducting state, recently observed in exfoliated iron-based superconductor flakes, in which the superconducting gap oscillates strongly with the…
Observation of charge density wave excitonic order parameter in topological insulator monolayer WTe2
Liam Watson, Joan Ripoll, Zhengjue Tong +12
Strong electron-hole interactions in a semimetal or narrow-gap semiconductor may drive a ground state of condensed excitons. Monolayer WTe2 has been proposed as a host material for…
Tunable superconducting diode effect in a topological nano-SQUID
Ella Nikodem, Jakob Schluck, Max Geier +6
A Josephson diode passes current with zero resistance in one direction but is resistive in the other direction. While such an effect has been observed in several platforms, a large…
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…
Observation of Cooper-pair density modulation state
Lingyuan Kong, Michał Papaj, Hyunjin Kim +8
Superconducting states that break space-group symmetries of the underlying crystal can exhibit nontrivial spatial modulation of the order parameter. Previously, such remarkable sta…
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…
Andreev reflection at the altermagnet-superconductor interface
Michał Papaj
Altermagnets are a new class of magnetic materials, which exhibit large spin splitting, but due to the combined spin and real space group symmetry protection maintain zero net macr…
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…
Current-enabled optical conductivity of superconductors
Michał Papaj, Joel E. Moore
In most superconductors, optical excitations require impurity scattering or the presence of multiple bands. This is because in clean single-band superconductors, the combination of…
Tunable vortex Majorana zero modes in LiFeAs superconductor
Lingyuan Kong, Lu Cao, Shiyu Zhu +12
The recent realization of pristine Majorana zero modes (MZMs) in vortices of iron-based superconductors (FeSCs) provides a promising platform for long-sought-after fault-tolerant q…
Discovery of segmented Fermi surface induced by Cooper pair momentum
Zhen Zhu, Michał Papaj, Xiao-Ang Nie +12
Since the early days of Bardeen-Cooper-Schrieffer theory, it has been predicted that a sufficiently large supercurrent can close the energy gap in a superconductor and creates gapl…
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…
A new Majorana platform in an Fe-As bilayer superconductor
Wenyao Liu, Lu Cao, Shiyu Zhu +16
Recently, iron-chalcogenide superconductors have emerged as a new and promising platform for studying and manipulating Majorana zero mode (MZM). By combining topological band struc…
Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor
Shiyu Zhu, Lingyuan Kong, Lu Cao +15
Majorana zero-modes (MZMs) are spatially-localized zero-energy fractional quasiparticles with non-Abelian braiding statistics that hold a great promise for topological quantum comp…
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…
Observation of half-integer level shift of vortex bound states in an iron-based superconductor
Lingyuan Kong, Shiyu Zhu, Michał Papaj +14
Vortices in topological superconductors host Majorana zero modes (MZMs), which are proposed to be building blocks of fault-tolerant topological quantum computers. Recently, a new s…
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…