Publications related to Fast and ultrafast electron microscopies for skyrmions and plasmonics

Attosecond coherent control of free-electron wave functions using semi-infinite light fields

Fabrizio Carbone, Giovanni Maria Vanacore, Ivan Madan, Enrico Pomarico, Gabriele Berruto, Ido Kaminer, Brett Eugene Barwick

Light–electron interaction is the seminal ingredient in free-electron lasers and dynamical investigation of matter. Pushing the coherent control of electrons by light to the attosecond timescale and below would enable unprecedented applications in quantum ...

2018

Velocity alignment promotes motility-induced phase separation

We study the phase behavior of polar active Brownian particles moving in two-spatial dimensions and interacting through volume exclusion and velocity alignment. We combine particle-based simulations of the microscopic model with a simple mean-field kinetic ...

IOP PUBLISHING LTD2018

New Insights into the Verwey Transition in Magnetite

Simone Borroni

Magnetite (Fe

_3

O

_4

) is the first magnetic material discovered by mankind. Despite thousands of years of applications, from the magnetic compass to data storage, and decades of basic research, it remains among the most fascinating materials for physicis ...

EPFL2018

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

Diane Virginie Marie Lançon

Collective magnetic excitations are a fascinating aspect of condensed matter physics, where neutron scattering can provide valuable insight into the magnetic properties of physical realisations of model systems. This thesis focuses on the excitation spectr ...

EPFL2017

Controlling the Topological Sector of Magnetic Solitons in Exfoliated Cr1/3NbS2 Crystals

Frédéric Mila, Natalia Chepiga, Fengping Li

We investigate manifestations of topological order in monoaxial helimagnet Cr1/3NbS2 by performing transport measurements on ultrathin crystals. Upon sweeping the magnetic field perpendicularly to the helical axis, crystals thicker than one helix pitch (48 ...

2017

Theories of topologically-induced phenomena in skyrmion-hosting magnetoelectric insulators

Oleksandr Kriuchkov

There once was a harsh competition between different computer memory technologies, and now we cheer triumph for the Random Access-Memory (RAM) devices, -- cheap, fast, tiny, stable. The competing Magnetic Bubble Memory had faded away as magnetic bubbles ar ...

EPFL2017

Crystalline Metamaterials for Topological Properties at Subwavelength Scales

Romain Christophe Rémy Fleury

Condensed matter physics has been a continuous source of inspiration for wave physicists, due to the strong analogies between electronic propagation in solids and waves interacting with materials. Recently, in this domain, a broad field of research has eme ...

Nature Publishing Group2017

Magnetic Skyrmions and Skyrmion Clusters in the Helical Phase of Cu2OSeO3

Henrik Moodysson Rønnow, Fabrizio Carbone, Ping Huang, Yoshie Murooka

Skyrmions are nanometric spin whirls that can be stabilized in magnets lacking inversion symmetry. The properties of isolated Skyrmions embedded in a ferromagnetic background have been intensively studied. We show that single Skyrmions and clusters of Skyr ...

2017

Persistence of a surface state arc in the topologically trivial phase of MoTe2

Marco Grioni, Arnaud Magrez, Oleg Yazyev, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi, Gabriel Albert Autes

The prediction of Weyl fermions in the low-temperature noncentrosymmetric 1T' phase of MoTe2 still awaits clear experimental confirmation. Here, we report angle-resolved photoemission (ARPES) data and ab initio calculations that reveal a surface state arc ...

Amer Physical Soc2017

Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects

Dirk Grundler, Vinayak Shantaram Bhat

We report angular-dependent spin-wave spectroscopy on kagome artificial spin ice made of large arrays of interconnected Ni80Fe20 nanobars. Spectra taken in saturated and disordered states exhibit a series of resonances with characteristic in-plane angular ...

Amer Physical Soc2017

Fast and ultrafast electron microscopies for skyrmions and plasmonics

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Attosecond coherent control of free-electron wave functions using semi-infinite light fields

Velocity alignment promotes motility-induced phase separation

New Insights into the Verwey Transition in Magnetite

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

Controlling the Topological Sector of Magnetic Solitons in Exfoliated Cr1/3NbS2 Crystals

Theories of topologically-induced phenomena in skyrmion-hosting magnetoelectric insulators

Crystalline Metamaterials for Topological Properties at Subwavelength Scales

Magnetic Skyrmions and Skyrmion Clusters in the Helical Phase of Cu2OSeO3

Persistence of a surface state arc in the topologically trivial phase of MoTe2

Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

Attosecond coherent control of free-electron wave functions using semi-infinite light fields

Magnetic Skyrmions and Skyrmion Clusters in the Helical Phase of Cu2OSeO3

Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects

Velocity alignment promotes motility-induced phase separation

New Insights into the Verwey Transition in Magnetite

Theories of topologically-induced phenomena in skyrmion-hosting magnetoelectric insulators

Controlling the Topological Sector of Magnetic Solitons in Exfoliated Cr1/3NbS2 Crystals

Crystalline Metamaterials for Topological Properties at Subwavelength Scales

Persistence of a surface state arc in the topologically trivial phase of MoTe2