Colloquium speaker, Darrell Schlom (Cornell University) today at 3:45pm

[Patterson, Robin L.]

Please join us for the Physics Colloquium today, at 3:45 PM in The Robert Smith Seminar Room. There will be a reception at 3:30PM in the Atrium. Details concerning the talk are as follows:

Speaker:        Darrell Schlom (Cornell University)
Date:             Tuesday, January 23, 2018
Time:             3:45PM
Place:            1080 Physics Research Building, The Robert Smith Seminar Room
Title:              Tuning the Band Structure of Ruthenates with Strain and Dimensionality



Abstract: Ruthenates with perovskite and perovskite-related structures host a remarkably diverse class of exotic quantum phases ranging from spin-triplet superconductivity, ferromagnetism, metamagnetism, spin-density waves, antiferromagnetism, and quantum criticality-all with the same basic building block of corner-sharing RuO6 octahedra containing Ru4+ ions.  We exploit strain engineering1 to tune the band structure of the complex oxide ruthenates:  CaRuO3,2,3 SrRuO3,3,4 and BaRuO3,5 with the perovskite structure as well as their two-dimensional counterparts Sr2RuO4 and Ba2RuO4.6  The ruthenate films are grown by reactive molecular-beam epitaxy (MBE) and the misfit strain is imposed by underlying substrates to strain these complex oxide thin films to percent levels3-far beyond where they would crack or plastically deform in bulk.  The band structure is revealed by high-resolution angle-resolved photoemission (ARPES) on pristine as-grown surfaces of these complex oxides made possible by a direct ultra-high vacuum connection between the MBE and ARPES.  Our work demonstrates the possibilities for utilizing strain engineering as a disorder-free means to manipulate emergent properties and many-body interactions in correlated materials.

The website for the colloquium is https://physics.osu.edu/physics-colloquium-schedule


Also, there is the speaker student discussion starting just after the colloquium, at 4:45pm in the Smith Seminar Room.



Robin
[The Ohio State University]
Robin Patterson
Program Coordinator
Department of Physics
1040K Physics Research Building, 191 W. Woodruff Avenue, Columbus, OH 43210
(614) 292-8523 Office     (614) 292-7557 Fax
patterson.716 at osu.edu<mailto:patterson.716 at osu.edu> osu.edu<http://osu.edu/>

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