Strain-mediated effects of oxygen deficiency and variation in non-Fermi liquid behavior of epitaxial PrNiO3−δ thin films

To understand the effects of oxygen variation in combination with different strains in perovskite nickelates, three sets of PrNiO3−δ thin films S1, S2 and S3 were deposited on (0 0 1) oriented single-crystal wafers of SrTiO3, LSAT [(LaAlO3)0.3(Sr2TaAlO6)0.7] and LaAlO3, respectively. Two sets of films, S1 and S2, have tensile strain whereas the films of S3 show compressive strain. For each set, two thin films of fixed thickness (5 nm) were deposited; one film was annealed in situ in oxygen partial pressure just after deposition, the other film was not annealed. The difference in oxygen stoichiometry caused a different state of epitaxial strain in the films. So, the strain was induced in the films due to lattice mismatch with substrate, which modified due to oxygen deficiency. These films show non-Fermi liquid (NFL) behavior in the metallic state. The fitting parameters to power-law equation show a systematic tuning of NFL fitting parameters because of variations in strain. Our results show that not only lattice mismatch induced strain, but also oxygen stoichiometry are crucial parameters in changing the state of strain and hence the NFL behavior and electronic properties of perovskite nickelates.

[1]  M. Chandra,et al.  Induced metal-insulator transition and temperature independent charge transport in NdNiO3-δ thin films , 2017 .

[2]  S. Middey,et al.  Physics of Ultrathin Films and Heterostructures of Rare-Earth Nickelates , 2016, 1606.09291.

[3]  S. Stemmer,et al.  Key role of lattice symmetry in the metal-insulator transition of NdNiO3 films , 2016, Scientific Reports.

[4]  L. You,et al.  Oxygen Vacancy Induced Room-Temperature Metal-Insulator Transition in Nickelate Films and Its Potential Application in Photovoltaics. , 2016, ACS applied materials & interfaces.

[5]  A. Janotti,et al.  Tuning bad metal and non-Fermi liquid behavior in a Mott material: Rare-earth nickelate thin films , 2015, Science Advances.

[6]  Y. Shimakawa,et al.  Strain-induced significant increase in metal-insulator transition temperature in oxygen-deficient Fe oxide epitaxial thin films , 2015, Scientific Reports.

[7]  M. Chandra,et al.  Contrasting effects of doping on insulating and metallic states of NdNi1−xMnxO3 thin films , 2014 .

[8]  Shriram Ramanathan,et al.  Origins of bad-metal conductivity and the insulator–metal transition in the rare-earth nickelates , 2013, Nature Physics.

[9]  James M Rondinelli,et al.  Heterointerface engineered electronic and magnetic phases of NdNiO3 thin films , 2013, Nature Communications.

[10]  S. Ramanathan,et al.  Oxide Electronics Utilizing Ultrafast Metal-Insulator Transitions , 2011 .

[11]  A. Bansil,et al.  Emergence of non-Fermi-liquid behavior due to Fermi surface reconstruction in the underdoped cuprate superconductors , 2010, 1004.3047.

[12]  Gustau Catalan,et al.  Progress in perovskite nickelate research , 2008 .

[13]  N. Hussey,et al.  Phenomenology of the normal state in-plane transport properties of high-Tc cuprates , 2008, 0804.2984.

[14]  J. Kreisel,et al.  Effect of tensile and compressive strains on the transport properties of SmNiO3 layers epitaxially grown on (001) SrTiO3 and LaAlO3 substrates , 2007 .

[15]  R. F. Jardim,et al.  Structural, microstructural, and transport properties of highly oriented LaNiO3 thin films deposited on SrTiO3 (100) single crystal , 2007 .

[16]  J. Goodenough,et al.  Pressure-induced non-Fermi-liquid behavior of PrNiO3. , 2005, Physical review letters.

[17]  J. Goodenough,et al.  Structure anomaly and electronic transition in R NiO 3 ( R = La , Pr , … , Gd ) , 2004 .

[18]  H. Takagi,et al.  Universality of the Mott–Ioffe–Regel limit in metals , 2004, cond-mat/0404263.

[19]  J. Goodenough,et al.  Transition from Curie-Weiss to enhanced Pauli paramagnetism inRNiO3(R=La,Pr,…Gd) , 2003 .

[20]  M. Calandra,et al.  Electrical resistivity at large temperatures: Saturation and lack thereof , 2002, cond-mat/0209099.

[21]  Rupp,et al.  Extraordinary pressure dependence of the metal-to-insulator transition in the charge-transfer compounds NdNiO3 and PrNiO3. , 1993, Physical review. B, Condensed matter.

[22]  M. Gurvitch.  Ioffe-Regel criterion and resistivity of metals , 1981 .