Nicholas R. Poniatowski
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View article: Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry
Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry Open
View article: Circuit quantum electrodynamics detection of induced two-fold anisotropic pairing in a hybrid superconductor–ferromagnet bilayer
Circuit quantum electrodynamics detection of induced two-fold anisotropic pairing in a hybrid superconductor–ferromagnet bilayer Open
View article: Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry
Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry Open
The melting of quasi-long-range superconductivity in two spatial dimensions occurs through the proliferation and unbinding of vortex-antivortex pairs -- a phenomenon known as the Berezinskii-Kosterlitz-Thouless (BKT) transition. Although s…
View article: Circuit QED detection of induced two-fold anisotropic pairing in a hybrid superconductor-ferromagnet bilayer
Circuit QED detection of induced two-fold anisotropic pairing in a hybrid superconductor-ferromagnet bilayer Open
Hybrid systems represent one of the frontiers in the study of unconventional superconductivity and are a promising platform to realize topological superconducting states. Owing to their mesoscopic dimensions, these materials are challengin…
View article: Stabilizing Fluctuating Spin-Triplet Superconductivity in Graphene via Induced Spin-Orbit Coupling
Stabilizing Fluctuating Spin-Triplet Superconductivity in Graphene via Induced Spin-Orbit Coupling Open
A recent experiment showed that a proximity-induced Ising spin-orbit coupling enhances the spin-triplet superconductivity in Bernal bilayer graphene. Here, we show that, due to the nearly perfect spin rotation symmetry of graphene, the flu…
View article: Surface Cooper-Pair Spin Waves in Triplet Superconductors
Surface Cooper-Pair Spin Waves in Triplet Superconductors Open
We study the electrodynamics of spin triplet superconductors including dipolar interactions, which give rise to an interplay between the collective spin dynamics of the condensate and orbital Meissner screening currents. Within this theory…
View article: Stabilizing fluctuating spin-triplet superconductivity in graphene via induced spin-orbit coupling
Stabilizing fluctuating spin-triplet superconductivity in graphene via induced spin-orbit coupling Open
A recent experiment showed that proximity induced Ising spin-orbit coupling enhances the spin-triplet superconductivity in Bernal bilayer graphene. Here, we show that, due to the nearly perfect spin rotation symmetry of graphene, the fluct…
View article: Proximity-induced collective modes in an unconventional superconductor heterostructure
Proximity-induced collective modes in an unconventional superconductor heterostructure Open
Unconventional superconductors have been long sought for their potential applications in quantum technologies and devices. A key challenge impeding this effort is the difficulty associated with probing and characterizing candidate material…
View article: Spectroscopic signatures of time-reversal symmetry breaking superconductivity
Spectroscopic signatures of time-reversal symmetry breaking superconductivity Open
View article: Cavity magnon-polaritons in cuprate parent compounds
Cavity magnon-polaritons in cuprate parent compounds Open
Cavity control of quantum matter may offer new ways to study and manipulate many-body systems. A particularly appealing idea is to use cavities to enhance superconductivity, especially in unconventional or high-$T_c$ systems. Motivated by …
View article: Surface Cooper pair spin waves in triplet superconductors
Surface Cooper pair spin waves in triplet superconductors Open
We study the electrodynamics of spin triplet superconductors including dipolar interactions, which give rise to an interplay between the collective spin dynamics of the condensate and orbital Meissner screening currents. Within this theory…
View article: Counterexample to the conjectured Planckian bound on transport
Counterexample to the conjectured Planckian bound on transport Open
It has recently been conjectured that the transport relaxation rate in metals is bounded above by the temperature of the system. In this work, we discuss the transport phenomenology of overdoped electron-doped cuprates, which we show const…
View article: A somewhat random walk through nuclear and particle physics
A somewhat random walk through nuclear and particle physics Open
These notes are an outgrowth of an advanced undergraduate course taught at the University of Maryland, College Park. They are intended as an introduction to various aspects of particle and nuclear physics with an emphasis on the role of sy…
View article: Hidden strange metallic state in underdoped electron-doped cuprates
Hidden strange metallic state in underdoped electron-doped cuprates Open
The low-temperature linear-in-T resistivity of “strange metals,” such as the metallic state of the cuprate high-temperature superconductors, has long been thought to be associated with a quantum critical point. However, recent transport st…
View article: Report on 2006.12564v2
Report on 2006.12564v2 Open
View article: Anomalous normal-state magnetotransport in an electron-doped cuprate
Anomalous normal-state magnetotransport in an electron-doped cuprate Open
We report magnetoresistance and Hall angle measurements of the electron-doped\ncuprate La$_{2-x}$Ce$_x$CuO$_4$ over a wide range of dopings from $x = 0.08 -\n0.17$. Above 100 K, we find an unconventional $\\sim H^{3/2}$ magnetic field\ndep…
View article: Resistivity saturation in an electron-doped cuprate
Resistivity saturation in an electron-doped cuprate Open
We report the observation of resistivity saturation in lightly doped ($x\\sim\n0.10)$ as-grown samples of the electron-doped cuprate La$_{2-x}$Ce$_x$CuO$_4$\n(LCCO). The saturation occurs at resistivity values roughly consistent with the\n…
View article: Strange Metallic Transport in the Antiferromagnetic Regime of Electron Doped Cuprates
Strange Metallic Transport in the Antiferromagnetic Regime of Electron Doped Cuprates Open
We report magnetoresistance and Hall Effect results for electron-doped films of the high-temperature superconductor La$_{2-x}$Ce$_x$CuO$_4$ (LCCO) for temperatures from 0.7 to 45 K and magnetic fields up to 65 T. For x = 0.12 and 0.13, jus…
View article: Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate
Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate Open
An understanding of the normal state in the high-temperature superconducting cuprates is crucial to the ultimate understanding of the long-standing problem of the origin of the superconductivity itself. This so-called “strange metal” state…