Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO3
- Pennsylvania State Univ., University Park, PA (United States)
- Northwestern Univ., Evanston, IL (United States)
- Rutgers Univ., Piscataway, NJ (United States)
- Univ. of North Florida, Jacksonville, FL (United States)
- Chinese Academy of Sciences (CAS), Beijing (China)
LiOsO3 is one of the first materials identified in the current literature as a “polar metal,” a class of materials that are simultaneously noncentrosymmetric and metallic. In this work, the linear and nonlinear optical susceptibility of LiOsO3 is studied by means of ellipsometry and optical second harmonic generation (SHG). Robust optical birefringence is observed using spectroscopic ellipsometry. The nonlinear optical susceptibility extracted from SHG polarimetry reveals that the tensor components are of the same magnitude as in the isostructural insulator LiNbO3, except the component along the polar axis d33 is suppressed by an order of magnitude. Temperature-dependent SHG measurements in combination with Raman spectroscopy indicate a continuous order-disorder type polar phase transition at 140 K. Linear and nonlinear optical microscopy measurements reveal 109°/71° ferroelastic domain walls, like in other trigonal ferroelectrics. No 180° polar domain walls are observed to emerge across the phase transition.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- SC0012375
- OSTI ID:
- 1540244
- Alternate ID(s):
- OSTI ID: 1471766
- Journal Information:
- Applied Physics Letters, Vol. 113, Issue 12; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Fast reflective optic-based rotational anisotropy nonlinear harmonic generation spectrometer
|
journal | May 2019 |
Raman interrogation of the ferroelectric phase transition in polar metal LiOsO 3
|
journal | September 2019 |
Effect of strain and doping on the polar metal phase in LiOsO$_3$ | text | January 2019 |
Similar Records
IrSi 3 As 3 : a first transition metal arsenide non-linear optical material
Second-harmonic and linear spectroscopy of $\textit{α}$-In2Se3