XXXVII International Symposium on Dynamical Properties of Solids (DyProSo2019)

Session

Afternoon Session 1

9 Sept 2019, 15:05

12. Spin dynamics and phonons, insights into potential molecular qubits

Stefano Benci (LENS - Università degli Studi di Firenze)

09/09/2019, 15:05

Oral

Molecular spins are characterized by an effective electronic and magnetic tunability and this is a very relevant property for quantum computation applications [1]. In particular metal complexes have unpaired electrons located in the d orbitals, whose energy can be easily tuned using proper ligands; hence, metal complexes are very promising candidate to realize qubit devices. An accurate choice...

57. Investigation of phonons and magnons in [Ni80Fe20/Au/Co/Au]10 multilayers

Miłosz Zdunek (Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614, Poznań, Poland)

09/09/2019, 15:25

Student Communication

The properties of surface acoustic waves (fig. 1a) and spin waves propagating in magnetic [Ni$_{80}$Fe$_{20}$/Au/Co/Au]$_{10}$ multilayers (fig. 1b) on silicon substrate have been investigated by high resolution Brillouin spectroscopy [1-2]. The behavior of spin waves was studied in two experimental geometries: Backward Volume (BV) geometry and Damon-Eshbach (DE) geometry [3]. The thickness of...

48. Ab-initio study of the electron-phonon interaction of a single Fe adatom on the MgO/Ag(100) surface

Haritz Garai-Marin (Materia Kondentsatuaren Fisika Saila, Euskal Herriko Unibertsitatea UPV/EHU, 644 Postakutxatila, 48080 Bilbao, Basque Country, Spain & Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastian, Basque Country, Spain)

09/09/2019, 15:35

Student Communication

Controlling the magnetic moment of individual atoms is a technologically important challenge, with applications as high density storage devices. Breakthrough experimental studies have recently shown that it is possible to create stable magnetic quantum states in individual adatoms  [1–3]⁠. While the role of electronic interactions on the magnetic stability has been thoroughly investigated...

53. Proton momentum distributions in strong hydrogen bonds in the solid state

Matthew Krzystyniak (Rutherford Appleton Laboratory, ISIS Facility, Chilton Didcot, OX 11 OQX, Oxfordshire, United Kingdom)

09/09/2019, 15:45

Oral

Neutron Compton scattering (NCS) is a unique experimental technique made possible by the development of epithermal neutron sources, such as the ISIS source of the Rutherford Appleton Laboratory in the UK [1, 2]. Dynamic structure factors, measured in NCS, are solely determined by the nuclear momentum distribution (NMD). In the picture of purely classical nuclei, the NMD shape is determined by...

29. Piezoelectric response of K0.5Na0.5NbO3 designed by sintering engineering

Mariana Gomes (IFIMUP-IN, Institute of Nanoscience and Nanotechnology, Department of Physics and Astronomy of Faculty of Sciences, University of Porto, Portugal )

11/09/2019, 15:55

Student Communication

Since the discovery of the piezoelectric properties of lead zirconate-titanate (PZT) solid solution, namely near its morphotropic phase boundary region (MPB), those materials exhibiting piezoelectricity have been largely studied, wherein PZT still stands as a prototype for electromechanical applications. However, lead based materials are poisonous in nature and thus they should be substitute...

45. Archetypal Soft-Mode Driven Antipolar Phase Transition in Francisite Cu3Bi(SeO3)2O2Cl

Cosme Milesi-Brault (Luxembourg Institute of Science and Technology)

11/09/2019, 16:05

Student Communication

Antiferroelectricity can be seen as being a property similar to antiferromagnetism with electric dipoles instead of spins. It is characterized by a phase transition between a high- and a low-symmetry phase where antiparallel dipoles emerge [1]. In analogy with soft-mode driven ferroelectric transitions (e.g. in PbTiO3), it is then possible to think of an ideal antiferroelectric phase...

32. Lattice dynamics and Raman spectrum of BaZrO3 single crystals

Constance Toulouse (Physics and Material Science Research Unit, University of Luxembourg, )

11/09/2019, 16:15

Oral

BaZrO3 is a perovskite that exhibits the ideal cubic structure with space group Pm-3m from ambient conditions down to 2 K [1]. However, theoretical studies by DFT yield a more complex picture: the cubic phase is predicted to be slightly unstable, with an unstable phonon mode at the R point, which should give rise to an antiferrodistortive (AFD) transition to a low-symmetry phase with...

56. 2D transition metal carbides as flexible anode materials

Dominik Legut (VSB - Technical University of Ostrava, IT4Innovations, Ostrava, Czech Republic)

11/09/2019, 16:35

Oral

MXenes exhibit many outstanding properties and therefore been considered as promising electrode material candidates. Taking 2D transition metal carbides as representatives, we systematically explored several influencing factors, including transition metal species, layer thickness, functional group, and strain on their mechanical properties (e.g., stiffness) and their electrochemical properties...

38. Nucleation in Aqueous KCl Solutions Induced by Laser Pulses

Renato Torre (European Laboratory for Non-Linear Spectroscopy (LENS), Università di Firenze, Italy; Dip. di Fisica ed Astronomia; Università di Firenze, Italy)

12/09/2019, 14:20

Oral

The nucleation processes are still today between the more intriguing problems of the condensed matter physics; they have been described by different models, but their understanding I still far to be complete [1]. In particular, we are missing the experimental investigations of the first nucleation events due to their unpredictable localization in the time and space coordinates.
The nucleation...

21. Dynamical properties of ice and water: a broadband dielectric spectroscopy study

Vasily Artemov (Skolkovo Institute of Science and Technology)

12/09/2019, 14:40

Oral

Though the mechanical properties of ice and water differ, they still have much in common from the dielectric spectroscopy viewpoint. We analyze the spectra of dynamical conductivity of solid and liquid water as a signature of their molecular dynamics. The dynamics of ice and water are considered on the same footing. We introduce a model [1] that provides a clear interpretation of the...

64. Tuning the fast dynamics of PNIPAM-based systems with bio-cosolvents

Benedetta Petra Rosi (University of Perugia)

12/09/2019, 15:20

Student Communication

Responsive polymers as poly-N-isopropylacrylamide (PNIPAM) are known as “smart”
materials due to their ability to respond to variations of parameters like temperature, pH,
pressure, and many others. PNIPAM phase behaviour results from a highly temperaturesensitive competition between hydrophobicity of methyl and methylene groups and the
ability of amide groups to make strong hydrogen bonds....

35. Molecular dynamics of a liquid crystal with highly ordered smectic E phase under different forms of confinement

Malgorzata Jasiurkowska-Delaporte (Institute of Nuclear Physics, Polish Academy of Sciences)

12/09/2019, 15:30

Oral

Liquid crystals (LCs) confined in various host system have attracted great interest in recent years. New material properties originating from finite size of pores and interaction between molecules and pore surface have been reported, including optical properties, dynamic peculiarities and different phase diagram than in bulk. It was concluded that a change in the transition temperature origins...