Growth of PdCoO<sub>2</sub> films with controlled termination by molecular-beam epitaxy and determination of their electronic structure by angle-resolved photoemission spectroscopy-Reference-Cited by-同舟云学术

Growth of PdCoO₂ films with controlled termination by molecular-beam epitaxy and determination of their electronic structure by angle-resolved photoemission spectroscopy

Published:2022-09-01 Issue:9 Volume:10 Page:091113
ISSN:2166-532X
Container-title:APL Materials
language:en
Short-container-title:APL Materials

Author:

Song Qi¹^ORCID,Sun Jiaxin¹^ORCID,Parzyck Christopher T.²^ORCID,Miao Ludi²^ORCID,Xu Qing³,Hensling Felix V. E.¹^ORCID,Barone Matthew R.¹^ORCID,Hu Cheng¹,Kim Jinkwon¹,Faeth Brendan D.³,Paik Hanjong³,King Phil D. C.⁴^ORCID,Shen Kyle M.²⁵^ORCID,Schlom Darrell G.¹⁵⁶^ORCID

Affiliation:

1. Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA

2. Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA

3. Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM), Cornell University, Ithaca, New York 14853, USA

4. SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom

5. Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA

6. Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany

Abstract

Utilizing the powerful combination of molecular-beam epitaxy (MBE) and angle-resolved photoemission spectroscopy (ARPES), we produce and study the effect of different terminating layers on the electronic structure of the metallic delafossite PdCoO2. Attempts to introduce unpaired electrons and synthesize new antiferromagnetic metals akin to the isostructural compound PdCrO2 have been made by replacing cobalt with iron in PdCoO2 films grown by MBE. Using ARPES, we observe similar bulk bands in these PdCoO2 films with Pd-, CoO2-, and FeO2-termination. Nevertheless, Pd- and CoO2-terminated films show a reduced intensity of surface states. Additionally, we are able to epitaxially stabilize PdFe xCo1− xO2 films that show an anomaly in the derivative of the electrical resistance with respect to temperature at 20 K, but do not display pronounced magnetic order.

Funder

Office of Science

Division of Materials Research

Publisher

AIP Publishing

Subject

General Engineering,General Materials Science

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0101837

Reference58 articles.

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2. Nearly free electrons in a 5 d delafossite oxide metal