Jan Długosz University

About: Jan Długosz University is a education organization based out in Częstochowa, Poland. It is known for research contribution in the topics: Crystal structure & Luminescence. The organization has 749 authors who have published 2311 publications receiving 19395 citations. The organization is also known as: Higher Teacher Education School.

New directions in telecollaborative research and practice: selected papers from the second conference on telecollaboration in higher education

Abstract: This collection of papers, consisting of 39 delegate contributions and three keynote articles from “New directions in telecollaborative research and practice: the second conference on telecollaboration in higher education” hosted by Trinity College Dublin in April 2016, offers a window on a rapidly evolving form of learning. Telecollaboration is used in many formats and contexts, but has as a defining feature the ability to unite learners from classrooms around the world in meaningful computer-mediated tasks and activities. This cross-disciplinary overview discusses telecollaboration in support of language and culture, teacher training, student mobility, and other disciplines and skills from a range of analytical perspectives. It will be of interest to anyone working in HE as an educator, researcher, educational designer, mobility officer, decision maker or administrator.

A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons.

Abstract: Antiferromagnetic two-dimensional (2D) materials are currently under intensive theoretical and experimental investigations in view of their potential applications in antiferromagnet-based magnonic and spintronic devices. Recent experimental studies revealed the importance of magnetic anisotropy and of Dzyaloshinskii-Moriya interactions (DMI) on the ordered ground state and the magnetic excitations in these materials. In this work we present a robust classical field theory approach to study the effects of anisotropy and the DMI on the edge and bulk spin waves in 2D antiferromagnetic nanoribbons. We predict the existence of a new class of nonreciprocal edge spin waves, characterized by opposite polarizations in counter-propagation. These novel edge spin waves are induced by the DMI and are fundamentally different from conventional nonreciprocal spin waves for which the polarization is independent of the propagation direction. We further analyze the effects of the edge structures on the magnetic excitations for these systems. In particular, we show that anisotropic bearded edge nanoribbons act as topologically trivial magnetic insulators with potentially interesting applications in magnonics. Our results constitute an important finding for current efforts seeking to establish unconventional magnonic devices utilizing spin wave polarization.

Short-range order evolution in S-rich Ge-S glasses by X-ray photoelectron spectroscopy

Abstract: The structure of binary GexS100 − x chalcogenide glasses (10 < x < 30) is determined by high-resolution X-ray photoelectron spectroscopy (XPS). On the basis of compositional dependence of fitting parameters for Ge and S core level XPS spectra, the ratio between edge- and corner-shared tetrahedra is determined. It is shown that short-range order of these glasses includes fragments of high-temperature crystalline form of GeS2. When subjected to X-irradiation, the structure of investigated glasses appears to become more homogeneous than that of the as-prepared samples.