**Special Colloquium** Emergent properties hidden in plain view: Strong electronic correlations at oxide interfaces

Event Dates: 

Thursday, February 12, 2015 - 4:00pm

CTQM Seminar Type: 

  • Related Seminar Series

Speaker Name(s): 

Jak Chakhalian

Speaker Affiliation(s): 

Center for Artificial Quantum Materials, University of Arkansas

Abstract, Event Details: 

Complex oxides are a class of materials characterized by a variety of competing interactions that create a subtle balance to define the lowest energy state and lead to a wide diversity of intriguing properties ranging from high Tc superconductivity to exotic magnetism and orbital phenomena. By utilizing bulk properties of these materials as a starting point, interfaces between different classes of complex oxides offer a unique opportunity to break the fundamental symmetries present in the bulk and alter the local environment. Harnessing our recent advances in complex oxide growth, we can combine materials with distinct or even antagonistic order parameters to create novel materials in the form of heterostructures with atomic layer precision. The broken lattice symmetry, strain, and altered chemical and electronic environments at the interfaces then provide a unique laboratory to manipulate this subtle balance and enable novel quantum manybody states not attainable in bulk. Understanding of these phases however requires detailed microscopic studies of the heterostructure properties. In this talk I will review our recent results on unit-cell thin nickelates, titanates and cuprate-manganite heterostructures to illustrate recentlyuncovered principles of rational materials design and control of collective quantum phenomena by the interface.
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3. Jian Liu et al, Nature Communications 4, 2714, (2013).
4. J. Chakhalian et al, Review of Modern Physics, 86, 1189, (2014)