Rumo, Maxime Nicholson, Christopher W. Pulkkinen, Aki Hildebrand, Baptiste Kremer, Geoffroy Salzmann, Björn Mottas, Marie-Laure Ma, K. Y. Wong, E. L. Man, M. K. L. Dani, K. M. Barbiellini, B. Muntwiler, Matthias Jaouen, Thomas Rohr, Fabian O. von Monney, Claude 2020-06-04 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. application/pdf https://folia.unifr.ch/global/documents/308771 https://folia.unifr.ch/documents/308771/files/mon_esp.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.101.235120 info:eu-repo/semantics/openAccess License undefined Physical Review B. - 2020, vol. 101, no. 23, p. 235120 info:eu-repo/classification/udc/53 Examining the surface phase diagram of ${\mathrm{IrTe}}_{2}$ with photoemission http://purl.org/coar/resource_type/c_6501