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Ing. Jan Hýbl: Výroba monokrystalického křemíku
Begin: 19.05.2021, 08:00
Location: ZOOM Meeting ID: 4613653704

Shin-ichi Fujimori: Electronic structures of uranium compounds studied by photoelectron spectroscopy
Begin: 19.05.2021, 10:10
Location: ZOOM Meeting ID: 958 0426 7376

Dariusz Kaczorowski: Dirac states in Pd-Bi superconductors: on the hunt for Majorana modes
Begin: 26.05.2021, 14:10
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Laura Teresa Corredor Bohórquez: The (Bi2Te3)n(MnBi2Te4) family: van-der-Waals materials from topology to magnetism
Begin: 02.06.2021, 14:10
Location: ZOOM Meeting ID: 958 0426 7376

 
Title: Herwig Michor: Crystal Growth and Studies of Magnetism and Charge Density Wave Physics in Quasi-1D Metals RNiC2
Number: 8/21
Status: Closing date exceeded
Begin: Wednesday, 17.03. 2021, 14:10
Tutor: Vladimír Sechovský
Location: ZOOM Meeting ID: 958 0426 7376


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We have a pleasure to invite you to attend the joint seminar
of the Department of Condensed Matter Physics (DCMP)
and the Materials Growth and Measurement Laboratory (MGML) http://mgml.eu.

 

Program

 

Crystal Growth and Studies of Magnetism and Charge Density Wave Physics in Quasi-1D Metals RNiC2

lecture given by:

Herwig Michor

Institute of Solid State Physics, Vienna University of Technology

 

https://cesnet.zoom.us/j/95804267376
Meeting ID: 958 0426 7376 

on Wednesday, 17.3. 2021 from 14:10 CET (13.10 UTC) 


Passcode will be provided on request at  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Vladimír Sechovský
On behalf of the DCMP and MGML


Abstract 

Ternary carbides RNiC2 (R = La, .. Lu, Y) and RCoC2 (R = Nd, .. Lu) crystallize in the non-centrosymmetric orthorhombic CeNiC2-type structure, space group Amm2. These compounds attracted attention, because of various interesting properties such as charge density wave (CDW) formation related to quasi-one-dimensional electronic features and Fermi surface nesting in RNiC2 with R = Pr, …, Lu, Y, and, finally, a complex interplay of CDW ordering and rare earth magnetism in RNiC2 (see Ref. [1] for a review).

 Here, we report on crystal growth, crystallographic characteristics explored via single crystal XRD, as well as on magnetic and electronic properties studied by a variety of techniques revealing orientation dependent, anisotropic features of RNiC2 (R = Pr, Nd, Gd, Dy, Ho, Y) single crystals. Based on heat capacity, thermal expansion and electrical resistivity studies, we analyse the nature of multiple CDW transitions occurring in RNiC2 crystals (e.g., orthorhombic to incommensurate CDW and incommensurate to commensurate CDW). We discuss their relations to electronic and crystal structure changes and, employing Clausius–Clapeyron and generalized Ehrenfest relations, we discuss resulting pressure and strain dependencies of these transitions as well as an expected elastic interaction between magnetic and CDW order parameters due to the spontaneous magneto-striction revealed by our thermal expansion studies.

[1] V. Babizhetskyy, B. Kotur, V. Levytskyy, H. Michor, Chapter 298: Alloy systems and compounds containing rare earth metals and carbon, in: J.-C.G. Bünzli, V.K. Pecharsky (Eds.), Handbook on the Physics and Chemistry of Rare Earths, Vol. 52, North-Holland, Amsterdam, pp. 1-263. (2017).