Glassy anomalies in the low-temperature thermal properties of a minimally disordered crystalline solid
| Autor: | Miguel A. Ramos, Tatiana Guidi, Andrzej Jeżowski, Francisco Javier Bermejo, J. Ll. Tamarit, Daria Szewczyk, Alexander I. Krivchikov, Yu. V. Horbatenko, Jonathan F. Gebbia |
|---|---|
| Přispěvatelé: | Comunidad de Madrid, Generalitat de Catalunya, National Science Centre (Poland), Ministerio de Economía y Competitividad (España), Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Física [Àrees temàtiques de la UPC] FOS: Physical sciences General Physics and Astronomy Anisotropia Disordered Systems and Neural Networks (cond-mat.dis-nn) 02 engineering and technology Trigonal crystal system Condensed Matter - Soft Condensed Matter Condensed Matter - Disordered Systems and Neural Networks 021001 nanoscience & nanotechnology Crystals 01 natural sciences Layered structure Crystal Chemical physics 0103 physical sciences Thermal Anisotropy Soft Condensed Matter (cond-mat.soft) Molecule Cristalls 010306 general physics 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya |
| Popis: | 6 pags., 4 figs. The low-temperature thermal and transport properties of an unusual kind of crystal exhibiting minimal molecular positional and tilting disorder have been measured. The material, namely, low-dimensional, highly anisotropic pentachloronitrobenzene has a layered structure of rhombohedral parallel planes in which the molecules execute large-amplitude in-plane as well as concurrent out-of-plane librational motions. Our study reveals that low-temperature glassy anomalies can be found in a system with minimal disorder due to the freezing of (mostly in-plane) reorientational jumps of molecules between equivalent crystallographic positions with partial site occupation. Our findings will pave the way to a deeper understanding of the origin of the above-mentioned universal glassy properties at low temperature. This work has been supported by the Spanish MINECO through projects FIS2014-54734-P, FIS2014-54498-R, and MAT2014-57866-REDT and “María de Maeztu” Program for Units of Excellence in R&D (MDM-2014-0377 and the National Science Centre (Poland) Grant No. UMO-2013/08/M/ST3/00934. We also acknowledge the Generalitat de Catalunya under Project 2014SGR-581 and the Autonomous Community of Madrid through program NANOFRONTMAG-CM (S2013/MIT-2850). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|