A1 Journal article (refereed), original research

Examining the surface phase diagram of IrTe2 with photoemission


Open Access publication

Publication Details
Authors: Rumo Maxime, Nicholson Christopher, Pulkkinen Aki, Hildebrand Baptiste, Kremer Geoffroy, Salzmann Björn, Mottas Marie-Laure, Ma Keyuan, Wong E Laine, Man Michael, Dani Keshav, Barbiellini Bernardo, Muntwiler Matthias, Jaouen Thomas, von Rohr Fabian, Monney Claude
Publisher: American Physical Society
Publication year: 2020
Language: English
Related Journal or Series Information: Physical Review B
Volume number: 101
Issue number: 23
ISSN: 2469-9950
eISSN: 2469-9969
JUFO-Level of this publication: 2
Open Access: Open Access publication
Location of the parallel saved publication: https://arxiv.org/pdf/1912.04516.pdf

Abstract

In the transition metal dichalcogenide IrTe2,
low-temperature charge-ordered phase transitions involving Ir dimers
lead to the occurrence of stripe phases of different periodicities, and
nearly degenerate energies. Bulk-sensitive measurements have shown that,
upon cooling, IrTe2 undergoes two such first-order transitions to (5×1×5) and (8×1×8) reconstructed phases at Tc1∼280 K and Tc2∼180 K, respectively. Here, using surface sensitive probes of the electronic structure of IrTe2, we reveal the first-order phase transition at Tc3=165 K to the (6×1)
stripes phase, previously proposed to be the surface ground state. This
is achieved by combining x-ray photoemission spectroscopy and
angle-resolved photoemission spectroscopy, which give access to the
evolution of stripe domains and a particular surface state, the energy
of which is dependent on the Ir dimer length. By performing measurements
over a full thermal cycle, we also report the complete hysteresis of
all these phases.


Last updated on 2020-31-08 at 13:34