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Electronic properties of epitaxial La1-xSrxRhO3 thin films

Journal Article · · Physical Review. B
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [2];  [5];  [5];  [5];  [2];  [2];  [2]
  1. Yale Univ., New Haven, CT (United States); OSTI
  2. Yale Univ., New Haven, CT (United States)
  3. West Campus Materials Characterization Core, West Haven, CT (United States)
  4. Univ. of Saskatchewan, Saskatoon, SK (Canada). Canadian Light Source, Inc.
  5. Univ. of British Columbia, Vancouver, BC (Canada)
+ Show Author Affiliations
Here, we report on the synthesis and electronic properties of epitaxial perovskite La1-xSrxRhO3 thin films. Thin films with a Sr content ranging from $$\textit{x}$$ = 0 to 0.5 have been grown using molecular beam epitaxy. Transport and x-ray photoemission spectroscopy data reveal an insulator-metal-insulator transition, accompanied by a $$\textit{p-}$$ to $$\textit{n}-$$ type carrier change observed in Hall measurements. Combined with theoretical calculations, we find that the addition of Sr does not directly dope carriers into the conduction band, but rather induces localized Rh 4$$\textit{d}$$ states within the LaRhO3 band gap. The bandwidth of the impurity band increases with Sr content, eventually causing the valence band (VB) and the localized Rh 4$$\textit{d}$$ band to overlap, which explains the first insulator-to-metal transition occurring at $$\textit{x}$$ = 0.35. For Sr content $$\textit{x}$$ > 0.4, possible cation ordering results in an increase of the gap between the VB and the Rh 4$$\textit{d}$$ band, leading to the second metal-to-insulator transition. We map out the electronic phase diagram of the Sr-doped LaRhO3 system and suggest strategies to engineer the electronic states in rhodate systems via delocalizing the Rh3+ states.
Research Organization:
Yale Univ., New Haven, CT (United States)
Sponsoring Organization:
Canada First Research Excellence Fund (CFREF); Canada Foundation for Innovation (CFI); Canada Research Chairs Program; Canadian Institute for Advanced Research (CIFAR); Canadian Institutes of Health Research (CIHR); Government of Saskatchewan; National Research Council (NRC); National Science Foundation (NSF); Natural Sciences and Engineering Research Council (NSERC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019211
OSTI ID:
1852937
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 19 Vol. 103; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (28)

Magnetic and Electric Properties of La1-xMxRhO3 (M = Ca, Sr, and Ba): Hole Doping in 4dε Orbitals of Rh3+ with Low Spin Configuration journal April 1993
Orthorhombic-Tetragonal and Semiconductor-Metal Transitions in the La1-xSrxRhO3 System journal May 1994
Colossal magnetoresistant materials: the key role of phase separation journal April 2001
Critical behavior in itinerant ferromagnet SrRu 1 - x Ti x O 3 journal November 2018
Computer predictions on Rh-based double perovskites with unusual electronic and magnetic properties journal March 2018
Metal-insulator transition in low dimensional La 0.75 Sr 0.25 VO 3 thin films journal September 2011
Perovskite LaRhO 3 as a p -type active layer in oxide photovoltaics journal February 2015
Charge disproportionation and the pressure-induced insulator–metal transition in cubic perovskite PbCrO 3 journal January 2015
The Basis of the Electron Theory of Metals, with Special Reference to the Transition Metals journal July 1949
Charge carrier localization in investigated by ac conductivity measurements journal January 1999
Absence of Diffusion in Certain Random Lattices journal March 1958
Projector augmented-wave method journal December 1994
Insulator-metal transition and giant magnetoresistance in La 1 − x Sr x MnO 3 journal May 1995
Density-functional theory and strong interactions: Orbital ordering in Mott-Hubbard insulators journal August 1995
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Prospects for quantum criticality in perovskite SrRhO 3 journal February 2003
Metal-insulator transition in a disordered and correlated Sr Ti 1 − x Ru x O 3 system: Changes in transport properties, optical spectra, and electronic structure journal March 2005
Photoemission and x-ray absorption study of the electronic structure of SrRu 1 − x Ti x O 3 journal June 2006
Semimetal and Topological Insulator in Perovskite Iridates journal March 2012
Electronic and magnetic properties of epitaxial SrRh O 3 films journal June 2017
Structural and metal-insulator transitions in rhenium-based double perovskites via orbital ordering journal January 2018
Restoring the Density-Gradient Expansion for Exchange in Solids and Surfaces journal April 2008
Charge Disproportionation without Charge Transfer in the Rare-Earth-Element Nickelates as a Possible Mechanism for the Metal-Insulator Transition journal March 2014
Lifshitz-Transition-Driven Metal-Insulator Transition in Moderately Spin-Orbit-Coupled Sr 2 − x La x RhO 4 journal September 2019
Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions journal January 1996
Metal-insulator transitions journal October 1998
The physics of manganites: Structure and transport journal August 2001
Anderson transitions journal October 2008

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36 MATERIALS SCIENCE
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