Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7

Shiming Lei, Mingqiang Gu, Danilo Puggioni, Greg Stone, Jin Peng, Jianjian Ge, Yu Wang, Baoming Wang, Yakun Yuan, Ke Wang, Zhiqiang Mao, James M. Rondinelli, Venkatraman Gopalan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Polar domains arise in insulating ferroelectrics when free carriers are unable to fully screen surface-bound charges. Recently discovered binary and ternary polar metals exhibit broken inversion symmetry coexisting with free electrons that might be expected to suppress the electrostatic driving force for domain formation. Contrary to this expectation, we report the first direct observation of polar domains in single crystals of the polar metal Ca 3 Ru 2 O 7 . By a combination of mesoscale optical second-harmonic imaging and atomic-resolution scanning transmission electron microscopy, the polar domains are found to possess a quasi-two-dimensional slab geometry with a lateral size of ∼100 μm and thickness of ∼10 nm. Electronic structure calculations show that the coexistence of electronic and parity-lifting orders arise from anharmonic lattice interactions, which support 90° and 180° polar domains in a metal. Using in situ transmission electron microscopy, we also demonstrate a strain-tuning route to achieve ferroelastic switching of polar metal domains.

Original languageEnglish (US)
Pages (from-to)3088-3095
Number of pages8
JournalNano letters
Volume18
Issue number5
DOIs
StatePublished - May 9 2018

Fingerprint

Metals
metals
Transmission electron microscopy
Ferroelectric materials
Electronic structure
Electrostatics
transmission electron microscopy
Tuning
Single crystals
Imaging techniques
free electrons
Scanning electron microscopy
Geometry
Electrons
parity
slabs
tuning
routes
inversions
electrostatics

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Lei, Shiming ; Gu, Mingqiang ; Puggioni, Danilo ; Stone, Greg ; Peng, Jin ; Ge, Jianjian ; Wang, Yu ; Wang, Baoming ; Yuan, Yakun ; Wang, Ke ; Mao, Zhiqiang ; Rondinelli, James M. ; Gopalan, Venkatraman. / Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7 In: Nano letters. 2018 ; Vol. 18, No. 5. pp. 3088-3095.
@article{ed024a28f2624a51990b40675059d1f8,
title = "Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7",
abstract = "Polar domains arise in insulating ferroelectrics when free carriers are unable to fully screen surface-bound charges. Recently discovered binary and ternary polar metals exhibit broken inversion symmetry coexisting with free electrons that might be expected to suppress the electrostatic driving force for domain formation. Contrary to this expectation, we report the first direct observation of polar domains in single crystals of the polar metal Ca 3 Ru 2 O 7 . By a combination of mesoscale optical second-harmonic imaging and atomic-resolution scanning transmission electron microscopy, the polar domains are found to possess a quasi-two-dimensional slab geometry with a lateral size of ∼100 μm and thickness of ∼10 nm. Electronic structure calculations show that the coexistence of electronic and parity-lifting orders arise from anharmonic lattice interactions, which support 90° and 180° polar domains in a metal. Using in situ transmission electron microscopy, we also demonstrate a strain-tuning route to achieve ferroelastic switching of polar metal domains.",
author = "Shiming Lei and Mingqiang Gu and Danilo Puggioni and Greg Stone and Jin Peng and Jianjian Ge and Yu Wang and Baoming Wang and Yakun Yuan and Ke Wang and Zhiqiang Mao and Rondinelli, {James M.} and Venkatraman Gopalan",
year = "2018",
month = "5",
day = "9",
doi = "10.1021/acs.nanolett.8b00633",
language = "English (US)",
volume = "18",
pages = "3088--3095",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "5",

}

Lei, S, Gu, M, Puggioni, D, Stone, G, Peng, J, Ge, J, Wang, Y, Wang, B, Yuan, Y, Wang, K, Mao, Z, Rondinelli, JM & Gopalan, V 2018, ' Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7 ', Nano letters, vol. 18, no. 5, pp. 3088-3095. https://doi.org/10.1021/acs.nanolett.8b00633

Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7 . / Lei, Shiming; Gu, Mingqiang; Puggioni, Danilo; Stone, Greg; Peng, Jin; Ge, Jianjian; Wang, Yu; Wang, Baoming; Yuan, Yakun; Wang, Ke; Mao, Zhiqiang; Rondinelli, James M.; Gopalan, Venkatraman.

In: Nano letters, Vol. 18, No. 5, 09.05.2018, p. 3088-3095.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca 3 Ru 2 O 7

AU - Lei, Shiming

AU - Gu, Mingqiang

AU - Puggioni, Danilo

AU - Stone, Greg

AU - Peng, Jin

AU - Ge, Jianjian

AU - Wang, Yu

AU - Wang, Baoming

AU - Yuan, Yakun

AU - Wang, Ke

AU - Mao, Zhiqiang

AU - Rondinelli, James M.

AU - Gopalan, Venkatraman

PY - 2018/5/9

Y1 - 2018/5/9

N2 - Polar domains arise in insulating ferroelectrics when free carriers are unable to fully screen surface-bound charges. Recently discovered binary and ternary polar metals exhibit broken inversion symmetry coexisting with free electrons that might be expected to suppress the electrostatic driving force for domain formation. Contrary to this expectation, we report the first direct observation of polar domains in single crystals of the polar metal Ca 3 Ru 2 O 7 . By a combination of mesoscale optical second-harmonic imaging and atomic-resolution scanning transmission electron microscopy, the polar domains are found to possess a quasi-two-dimensional slab geometry with a lateral size of ∼100 μm and thickness of ∼10 nm. Electronic structure calculations show that the coexistence of electronic and parity-lifting orders arise from anharmonic lattice interactions, which support 90° and 180° polar domains in a metal. Using in situ transmission electron microscopy, we also demonstrate a strain-tuning route to achieve ferroelastic switching of polar metal domains.

AB - Polar domains arise in insulating ferroelectrics when free carriers are unable to fully screen surface-bound charges. Recently discovered binary and ternary polar metals exhibit broken inversion symmetry coexisting with free electrons that might be expected to suppress the electrostatic driving force for domain formation. Contrary to this expectation, we report the first direct observation of polar domains in single crystals of the polar metal Ca 3 Ru 2 O 7 . By a combination of mesoscale optical second-harmonic imaging and atomic-resolution scanning transmission electron microscopy, the polar domains are found to possess a quasi-two-dimensional slab geometry with a lateral size of ∼100 μm and thickness of ∼10 nm. Electronic structure calculations show that the coexistence of electronic and parity-lifting orders arise from anharmonic lattice interactions, which support 90° and 180° polar domains in a metal. Using in situ transmission electron microscopy, we also demonstrate a strain-tuning route to achieve ferroelastic switching of polar metal domains.

UR - http://www.scopus.com/inward/record.url?scp=85046682814&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046682814&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.8b00633

DO - 10.1021/acs.nanolett.8b00633

M3 - Article

C2 - 29631404

AN - SCOPUS:85046682814

VL - 18

SP - 3088

EP - 3095

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 5

ER -