Infrared spectroscopy study of the nodal-line semimetal candidate ZrSiTe under pressure: Hints for pressure-induced phase transitions

Abstract

We studied the effect of external pressure on the optical response of the nodal-line semimetal candidate ZrSiTe by reflectivity measurements. At pressures of a few GPa, the reflectivity, optical conductivity, and loss function are strongly affected in the whole measured frequency range (200-16500 cm${}^{-1}$), indicating drastic changes in the electronic band structure. The pressure-induced shift of the electronic bands affects both the intraband and interband transitions. We find anomalies in the pressure dependence of several optical parameters at the pressures $P_{c1}$$\approx$4.1 GPa and $P_{c2}$$\approx$6.5 GPa, suggesting the occurrence of two phase transitions of either structural or electronic type.

5 pages, 2 figures, accepted for publication in Phys. Rev. B

References in corpus (4)

• Non-symmorphic band degeneracy at the Fermi level in ZrSiTe
• Flat optical conductivity in ZrSiS due to two-dimensional Dirac bands
• Chemical pressure effect on the optical conductivity of the nodal-line semimetals ZrSi$Y$ ($Y$=S, Se, Te) and ZrGe$Y$ ($Y$=S, Te)
• Possible pressure-induced topological quantum phase transition in the nodal line semimetal ZrSiS

Cited by in corpus (6)

• Pressure-induced excitations in the out-of-plane optical response of the nodal-line semimetal ZrSiS
• Signature of an Ultrafast Photo-Induced Lifshitz Transition in the Nodal-Line Semimetal ZrSiTe
• In-plane and out-of-plane optical response of the nodal-line semimetals ZrGeS and ZrGeSe
• Near room-temperature ferromagnetism from double-exchange in the van der Waals material CrGeTe${}_3$: evidence from optical conductivity under pressure
• Optical study of the charge dynamics evolution in the topological insulators MnBi${}_2$Te${}_4$ and Mn(Bi${}_{0.74}$Sb${}_{0.26}$)${}_2$Te${}_4$ under high pressure
• Increasing the number of topological nodal lines in semimetals via uniaxial pressure