Year: 2024
Type: article
Abstract: The phase transitions in IrTe 2 have been extensively studied but the symmetry at each phase is yet to be settled. Employing second harmonic generation (SHG) measurements over a temperature range of 4 –300 K, we probe the evolution of the symmetry of IrTe 2 . Our results indicate shifts in two distinct transition temperatures (T s1 and T s2 with T s1 > T s2 ) through thermal cycling, providing an explanation for the variations of reported values in literature. The SHG polarimetry measurements identify symmetries in different temperature ranges, confirming the trigonal symmetry above T s1 , the triclinic symmetry between T s1 and T s2 , and the coexistence of multiple stripe phases below T s2 . The most striking feature is the reemergence of a trigonal phase as reflected by six-fold symmetry below ~ 10 K which is likely responsible for phenomena observed at low temperatures.
Source: Scientific Reports
Institution: University of South Carolina
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,590
OpenAlex ID: W4403620019