Hybrid Molecular Beam Epitaxy Growth of Sr<sub>2</sub>RuO<sub>4</sub> Films
ORAL
Abstract
Since the discovery of superconductivity in (La,Ba)2CuO4 in 1986, there has been much work in studying structurally similar materials such as layered ruthenates. Sr2RuO4 is an unconventional superconductor with Tc = ~ 1.7 K that is highly sensitive to defects and strain. In this talk, we will present a novel molecular beam epitaxy (MBE) growth strategy for the growth of high quality Sr2RuO4 films that utilizes an effusion cell for Sr, a chemical precursor for Ru, and a radio-frequency (RF) plasma to supply oxygen. Films were grown at 900 °C. Reflection high energy electron diffraction (RHEED) showed streaky patterns consistent with smooth film morphology. High resolution X-ray diffraction of Sr2RuO4 on LSAT (001) yielded a bulk-like lattice parameter. Room temperature electronic transport yielded a resistivity value of 73 µΩ-cm. We will discuss a detailed structure - strain - transport property relationship of Sr2RuO4 films grown using our novel MBE approach.
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Presenters
Rashmi Choudhary
Department of Chemical Engineering and Materials Science, University of Minnesota, University of Minnesota
Authors
Rashmi Choudhary
Department of Chemical Engineering and Materials Science, University of Minnesota, University of Minnesota
Tristan Truttmann
Department of Chemical Engineering and Materials Science, University of Minnesota, University of Minnesota
Jin Yue
Department of Chemical Engineering and Materials Science, University of Minnesota, University of Minnesota
William Nunn
University of Minnesota, Department of Chemical Engineering and Materials Science, University of Minnesota
Bharat Jalan
University of Minnesota, Department of Chemical Engineering and Materials Science, University of Minnesota, Department of Electrical and Computer Engineering, University of Minnesota
