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Title: Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO 3

Abstract

LiOsO 3 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 LiOsO 3 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 LiNbO 3, except the component along the polar axis d 33 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.

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [3]; ORCiD logo [4];  [5];  [3]; ORCiD logo [2];  [1]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Rutgers Univ., Piscataway, NJ (United States)
  4. Univ. of North Florida, Jacksonville, FL (United States)
  5. Chinese Academy of Sciences (CAS), Beijing (China)
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1540244
Alternate Identifier(s):
OSTI ID: 1471766
Grant/Contract Number:  
SC0012375
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 12; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

Citation Formats

Padmanabhan, Haricharan, Park, Yoonsang, Puggioni, Danilo, Yuan, Yakun, Cao, Yanwei, Gasparov, Lev, Shi, Youguo, Chakhalian, Jak, Rondinelli, James M., and Gopalan, Venkatraman. Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO3. United States: N. p., 2018. Web. doi:10.1063/1.5042769.
Padmanabhan, Haricharan, Park, Yoonsang, Puggioni, Danilo, Yuan, Yakun, Cao, Yanwei, Gasparov, Lev, Shi, Youguo, Chakhalian, Jak, Rondinelli, James M., & Gopalan, Venkatraman. Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO3. United States. doi:10.1063/1.5042769.
Padmanabhan, Haricharan, Park, Yoonsang, Puggioni, Danilo, Yuan, Yakun, Cao, Yanwei, Gasparov, Lev, Shi, Youguo, Chakhalian, Jak, Rondinelli, James M., and Gopalan, Venkatraman. Thu . "Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO3". United States. doi:10.1063/1.5042769. https://www.osti.gov/servlets/purl/1540244.
@article{osti_1540244,
title = {Linear and nonlinear optical probe of the ferroelectric-like phase transition in a polar metal, LiOsO3},
author = {Padmanabhan, Haricharan and Park, Yoonsang and Puggioni, Danilo and Yuan, Yakun and Cao, Yanwei and Gasparov, Lev and Shi, Youguo and Chakhalian, Jak and Rondinelli, James M. and Gopalan, Venkatraman},
abstractNote = {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.},
doi = {10.1063/1.5042769},
journal = {Applied Physics Letters},
number = 12,
volume = 113,
place = {United States},
year = {2018},
month = {9}
}

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