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Our Publications

Roughness and dynamics of proliferating cell fronts as a probe of cell–cell interactions
Guillaume Rapin, Nirvana Belen Caballero, Iaroslav Gaponenko, Benedikt Ziegler, Audrey Rawleigh, Ermanno Moriggi, Thierry Giamarchi, Steven A. Brown and Patrycja Paruch

Scientific reports 11 1, 8869 (2021)

Juxtacellular interactions play an essential but still not fully understood role in both normal tissue development and tumour invasion. Using proliferating cell fronts as a model system, we explore the effects of cell–cell interactions on the geometry and dynamics of these one-dimensional…

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Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
Iaroslav Gaponenko, Loïc Musy, Neus Domingo, Nicolas Stucki, Albert Verdaguer, Nazanin Bassiri-Gharb and Patrycja Paruch

npj computational materials 7 1, 163 (2021)

Electrochemical phenomena in ferroelectrics are of particular interest for catalysis and sensing applications, with recent studies highlighting the combined role of the ferroelectric polarisation, applied surface voltage and overall switching history. Here, we present a systematic Kelvin probe…

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Statistical physics approach to ferroelectrics and biological interfaces
Guillaume Rapin

Thèse, 113 (2021)

La physique des systèmes élastiques désordonnés permet d’étudier des systèmes très variés, tel que les côtes des îles anglo-saxonnes érodées par le temps, des fissures se propageant dans le granite, les parois de domaine dans les matériaux ferroïcs, et les fronts cellulaires en…

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Local Probe Comparison of Ferroelectric Switching Event Statistics in the Creep and Depinning Regimes in Pb(Zr0.2Ti0.8)O3 Thin Films
Philippe Tueckmantel, Iaroslav Gaponenko, Nirvana Belen Caballero, Joshua C. Agar, Lane W. Martin, Thierry Giamarchi and Patrycja Paruch

Physical Review Letters 126 117606 (2021)

Ferroelectric materials provide a useful model system to explore the jerky, highly nonlinear dynamics of elastic interfaces in disordered media. The distribution of nanoscale switching event sizes is studied in two Pb(Zr0.2Ti0.8)O3 thin films with different disorder landscapes using piezoresponse…

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Dynamic response and roughening of ferroelectric domain walls driven at planar electrode edges
Guillaume Rapin, Sophia Ehrensperger, Cédric Blaser, Nirvana Belen Caballero and Patrycja Paruch

Applied Physics Letters 119, 242903 (2021)

Understanding and controlling the motion, stability, and equilibrium configuration of ferroelectric domain walls is key for their integration into potential nanoelectronic applications, such as ferroelectric racetrack memories. Using piezoresponse force microscopy, we analyze the growth and…

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Hystorian: A processing tool for scanning probe microscopy and other n-dimensional datasets
Loïc Musy, Ralph Adam Yap Bulanadi, Iaroslav Gaponenko and Patrycja Paruch

Ultramicroscopy 228 113345 (2021)

Research in materials science increasingly depends on the correlation of information from multiple characterisation techniques, acquired in ever larger datasets. Efficient methods of processing and storing these complexdatasets are therefore crucial. Reliably keeping track of data processing is…

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Master thesis