Universität zu Köln

Reschke, S., Tsurkan, V, Do, S-H, Choi, K-Y, Lunkenheimer, P., Wang, Zhe and Loidl, A. (2019). Terahertz excitations in alpha-RuCl3: Majorana fermions and rigid-plane shear and compression modes. Phys. Rev. B, 100 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

Spin liquids may host emergent quasiparticles, collective excitations of the spin degrees of freedom with characteristic features of Majorana fermions, which experimentally are detectable by broad excitation continua due to spin fractionalization. The latter is predicted for the Kitaev spin liquid, an exactly solvable model with bond-dependent interactions on a two-dimensional honeycomb lattice. Here we report on detailed terahertz experiments in alpha-RuCl3, identifying these characteristic fingerprints of Majorana fermions. The continuum intensity decreases and finally vanishes on increasing temperature. It partly overlaps with phonon modes, representing characteristic sliding and compression modes of the van der Waals bonded molecular layers.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Reschke, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tsurkan, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Do, S-H UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, K-Y UNSPECIFIED UNSPECIFIED UNSPECIFIED Lunkenheimer, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Zhe UNSPECIFIED UNSPECIFIED UNSPECIFIED Loidl, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-141673
DOI:	10.1103/PhysRevB.100.100403
Journal or Publication Title:	Phys. Rev. B
Volume:	100
Number:	10
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language QUANTUM; FRACTIONALIZATION Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14167