@epfl.ch
STI LMTM
Materials Science, Metals and Alloys
Scopus Publications
Claire Navarre, Steven Van Petegem, Lucas Schlenger, Cyril Cayron, Milad Hamidi-Nasab, Reza Esmaeilzadeh, Charlotte de Formanoir, Nicola Casati, and Roland E. Logé
Elsevier BV
J.F. Xiao, C. Cayron, M. Van der Meer, and R.E. Logé
Elsevier BV
Reza Esmaeilzadeh, Milad Hamidi-Nasab, Charlotte de Formanoir, Lucas Schlenger, Steven Van Petegem, Claire Navarre, Cyril Cayron, Nicola Casati, Daniel Grolimund, and Roland E. Logé
Elsevier BV
J.F. Xiao, C. Cayron, and R.E. Logé
Elsevier BV
Navid Sohrabi, Ruoshi Ran, Pau Ayuso Duro, Cyril Cayron, Jamasp Jhabvala, Vaclav Pejchal, Olha Sereda, and Roland E. Logé
Elsevier BV
A. Rezaei, R. Mahmudi, C. Cayron, and R.E. Logé
Elsevier BV
Nicolò Maria della Ventura, Amit Sharma, Cyril Cayron, Szilvia Kalácska, Thomas E.J. Edwards, Cinzia Peruzzi, Manish Jain, Julia T. Pürstl, Roland E. Logé, Johann Michler,et al.
Elsevier BV
Cyril Cayron
Elsevier BV
J.F. Xiao, C. Cayron, and R.E. Logé
Elsevier BV
Cyril Cayron
Elsevier BV
Aliakbar Fallah Sheykhlari, Hossein Arabi, Seyed Mohammad Ali Boutorabi, and Cyril Cayron
Springer Science and Business Media LLC
Sandy Sánchez, Stefania Cacovich, Guillaume Vidon, Jean-François Guillemoles, Felix Eickemeyer, Shaik M. Zakeeruddin, Jürgen E. K. Schawe, Jörg F. Löffler, Cyril Cayron, Pascal Schouwink,et al.
Royal Society of Chemistry (RSC)
In this work, we elucidate the relationship between heating-rate and FAPbI3 perovskite phase transformation, bringing a new relationship with crystal growth parameters. Thus, we manufactured highly stable perovskite solar cells with a 640 ms IR pulse.
Nicolò M. della Ventura, Amit Sharma, Szilvia Kalácska, Manish Jain, Thomas E.J. Edwards, Cyril Cayron, Roland Logé, Johann Michler, and Xavier Maeder
Elsevier BV
G.D. Tolometti, T.M. Erickson, G.R. Osinski, C. Cayron, and C.D. Neish
Elsevier BV
Margaux N.D. Larcher, Cyril Cayron, Andreas Blatter, Raphaëlle Soulignac, and Roland E. Logé
Elsevier BV
Hossein Ghasemi-Tabasi, Margaux N.D. Larcher, Cyril Cayron, Jamasp Jhabvala, Steven Van Petegem, Nikola Kalentics, Eric Boillat, and Roland E. Logé
Elsevier BV
Cyril Cayron
MDPI AG
Martensite crystallography is usually described by the phenomenological theory of martensite crystallography (PTMC). This theory relies on stretch matrices and compatibility equations, but it does not give a global view on the structures of variants, and it masks the relative roles of the symmetries and metrics. Here, we propose an alternative theory called correspondence theory (CT) based on correspondences and symmetries. The compatibility twins between the martensite variants are inherited by correspondence from the symmetry elements of austenite. We show that, for the B2 to B19′ transformation, there is a one-to-one relation between the specific misorientations and the specific inter-correspondences between the variants. For each type of misorientation, the twin of its junction plane can be predicted without calculating the stretch matrices, as in PTMC. The rational elements of the twins do not depend on the metrics; all the transformation twins are thus “generic”. We also introduce the concept of a weak plane that permits to explain the junction planes for polar pairs of variants for which the PTMC compatibility equations cannot be solved. The predictions are validated by comparison with experimental Transmission Kikuchi Diffraction (TKD) maps.
Cyril Cayron
International Union of Crystallography (IUCr)
A geometric method of lattice reduction based on cycles of directional and hyperplanar shears is presented. The deviation from cubicity at each step of the reduction is evaluated by a parameter called `basis rhombicity' which is the sum of the absolute values of the elements of the metric tensor associated with the basis. The levels of reduction are quite similar to those obtained with the Lenstra–Lenstra–Lovász (LLL) algorithm, at least up to the moderate dimensions that have been tested (lower than 20). The method can be used to reduce unit cells attached to given hyperplanes.
B. Rouxel, Cyril Cayron, Julien Bornand, Paul Sanders, and Roland E. Logé
Elsevier BV
A. Rezaei, R. Mahmudi, C. Cayron, and R. Loge
Elsevier BV
A. Rezaei, R. Mahmudi, C. Cayron, and R.E. Loge
Elsevier BV
Cyril Cayron
International Union of Crystallography (IUCr)
Deformation twinning on a plane is a simple shear that transforms a unit cell attached to the plane into another unit cell equivalent by mirror symmetry or 180° rotation. Thus, crystallographic models of twinning require the determination of the short unit cells attached to the planes, or hyperplanes for dimensions higher than 3. Here, a method is presented to find them. Equivalently, it gives the solutions of the N-dimensional Bézout's identity associated with the Miller indices of the hyperplane.