Sökning: onr:"swepub:oai:lup.lub.lu.se:bf4692d3-268d-4307-b536-2c624908a7c8" >
Enhanced orbital an...
Enhanced orbital anisotropy through the proximity to a SrTi O3 layer in the perovskite iridate superlattices
-
- Huang, Wencheng (författare)
- Advanced Light Source, Berkeley,University of the Chinese Academy of Sciences
-
- Liu, Wanling (författare)
- ShanghaiTech University
-
- Shao, Yu Cheng (författare)
- National Synchrotron Radiation Research Center Taiwan,Advanced Light Source, Berkeley
-
visa fler...
-
- Feng, Xuefei (författare)
- Advanced Light Source, Berkeley
-
- Zhang, Nian (författare)
- Chinese Academy of Sciences
-
- Fu, Jiamin (författare)
- University of Western Ontario
-
- Lee, Jenn Min (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
-
- Shen, Dawei (författare)
- Chinese Academy of Sciences
-
- Chuang, Yi De (författare)
- Advanced Light Source, Berkeley
-
- Liu, Xiaosong (författare)
- ShanghaiTech University
-
visa färre...
-
(creator_code:org_t)
- 2021
- 2021
- Engelska.
-
Ingår i: Physical Review B. - 2469-9950. ; 104:7
- Relaterad länk:
-
http://dx.doi.org/10...
-
visa fler...
-
https://lup.lub.lu.s...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We have used angle-dependent soft x-ray absorption spectroscopy (XAS) at the O K edge and first-principles calculations to investigate the electronic structures of iridate-based superlattices (SrIrO3)m/(SrTiO3) (m=1, 2, 3, and ∞). We focus on the pre-edge Ir 5d t2g-O 2p orbital hybridization feature in the XAS spectra. By varying the measurement geometry relative to the incident photon polarization, we are able to extract the dichroic contrast and observe the systematic increase in the anisotropy of Ir 5d orbitals as m decreases. First-principles calculations elucidate the orbital anisotropy coming mainly from the enhanced out-of-plane compression of IrO6 octahedra in the SrIrO3 layers that are adjacent to the inserted SrTiO3 layers. As m decreases, the increased volume fraction of these interfacial SrIrO3 layers and their contact with the SrTiO3 layers within the (SrIrO3)m/(SrTiO3) supercell lead to enhanced orbital anisotropy. Furthermore, the tilt and rotation of IrO6 octahedra are shown to be essential to understand the subtle orbital anisotropy in these superlattices, and constraining these degrees of freedom will give an incorrect trend. Our results demonstrate that the structural constraint from the inserted SrTiO3 layers, in addition to other electronic means such as polar interface and charge transfer, can serve as a knob to control the orbital degree of freedom in these iridate-based superlattices.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Huang, Wencheng
-
Liu, Wanling
-
Shao, Yu Cheng
-
Feng, Xuefei
-
Zhang, Nian
-
Fu, Jiamin
-
visa fler...
-
Lee, Jenn Min
-
Shen, Dawei
-
Chuang, Yi De
-
Liu, Xiaosong
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Den kondenserade ...
- Artiklar i publikationen
-
Physical Review ...
- Av lärosätet
-
Lunds universitet