Insulating-layer formation of metallic LaNiO{sub 3} on Nb-doped SrTiO{sub 3} substrate

Journal Article · Mon Mar 23 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4916225· OSTI ID:22398764

Yoo, Hyang Keun; Kim, Hyeong-Do; Sohn, Chang Hee; Sinn, Soobin; Oh, Ji Seop; Kuo, Cheng-Tai; Noh, Tae Won ^[1]; Chang, Young Jun ^[2]; Moreschini, Luca; Bostwick, Aaron; Rotenberg, Eli ^[3]

---

1. Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747 (Korea, Republic of)
2. Department of Physics, University of Seoul, Seoul 130-743 (Korea, Republic of)
3. Advanced Light Source (ALS), E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

We investigated the electronic structures of strongly correlated metallic LaNiO{sub 3} (LNO) and semiconducting Nb-doped SrTiO{sub 3} (Nb:STO) heterostructures by varying the LNO film thickness using in situ photoemission spectroscopy. We found that, contrary to other interfaces with SrTiO{sub 3} and LaAlO{sub 3}, insulating LNO layers are formed between metallic LNO layers and Nb:STO. Such behavior seems to be related with an electron transfer from Nb:STO to LNO due to Schottky-barrier formation at the interface.

• OSTI ID: 22398764
• Journal Information: Applied Physics Letters, Vol. 106, Issue 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
DIFFUSION BARRIERS
DOPED MATERIALS
ELECTRON TRANSFER
ELECTRONIC STRUCTURE
FILMS
HETEROJUNCTIONS
INTERFACES
LANTHANUM COMPOUNDS
LAYERS
NIOBATES
PHOTOELECTRON SPECTROSCOPY
STRONTIUM TITANATES
SUBSTRATES