Atomic and electronic structure of domains walls in a polar metal
- Pennsylvania State Univ., University Park, PA (United States)
- Northwestern Univ., Evanston, IL (United States)
- Tulane Univ., New Orleans, LA (United States)
- Tulane Univ., New Orleans, LA (United States); Pennsylvania State Univ., State College, PA (United States)
Polar metals counterintuitively bring two well-known phenomena into coexistence, namely, bulk polar displacements, and an electronic Fermi surface giving rise to metallic conduction. Furthermore, little is known about the polar domains or domain walls in such materials. Using atomic resolution electron microscopy imaging combined with first principles density functional theory, we show that uncharged head-to-tail walls, and “charged” head-to-head and tail-to-tail walls can exist in the bulk of such crystals of polar metals Ca3Ru2O7, where both structural changes at the wall as well as electrostatic considerations define the wall nature. Significant built-in potentials of 30–170 meV are predicted at such walls.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (United States); Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Army Research Office (ARO)
- Grant/Contract Number:
- SC0012375; SC0012432; W911NF-15-1-0017
- OSTI ID:
- 1611780
- Alternate ID(s):
- OSTI ID: 1490134
- Journal Information:
- Physical Review B, Vol. 99, Issue 1; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2
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journal | September 2019 |
Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2 | text | January 2019 |
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