Title: Herwig Michor: Crystal growth and studies of CDW physics in quasi-1D metals RNiC2
Number: 12/19
Status: Closing date exceeded
Begin: Thursday, 28.03. 2019, 12:30
Tutor: Vladimír Sechovský
Location: lecture room F2, first floor Ke Karlovu 5

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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)



Crystal growth and studies of CDW physics in quasi-1D metals RNiC2

lecture given by:

Herwig Michor

TU Wien, Institute of Solid State Physics, Freihaus, 6OGC 


The seminar takes place in the lecture room F2
of the Faculty of Mathematics and Physics, Ke Karlovu 5, Praha 2
on Thursday, 28.3. 2019 from 12:30

Vladimír Sechovský
On behalf of the DCMP and MGML



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 already for two decades, because of various interesting properties such as exotic superconductivity in LaNiC2, observation of 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 with rare earth magnetism in RNiC2.

In the present talk, we report on crystal growth, crystallographic characteristics, magnetic and electronic properties studied by magnetization, specific heat and electrical resistivity as well as magneto-resistance measurements with focus on systems without rare earth magnetism: YNiC2 and LuNiC2. Our experimental studies on YNiC2 and LuNiC2 are supplemented by DFT electronic structure studies aiming to reveal Fermi surface features related to CDW ordering as well as interrelations between features and anisotropy of electronic transport properties and the Fermi surface topology.

Calculated Fermi surface of LuNiC2 above and below the CDW transition: 

 michor1  michor2