Session MOE. There are 3 abstracts in this session.



Session: Emerging Science, time: 4:00pm-4:40pm

Novel magnetism and local symmetry breaking in a Mott insulator with strong spin orbit interactions


Vesna F. Mitrovic'
Brown University, Providence, RI
Study of the combined effects of strong electronic correlations with spin-orbit coupling represents a central issue in quantum materials research. Predicting emergent properties represents a huge theoretical problem. Existing theories propose the emergence of a multitude of quantum phases, distinguishable by either local point symmetry breaking or local spin expectation values. Experimental tests of these theories by local probes are highly sought for. Our  measurements provide such tests [1]. We show that a canted ferromagnetic phase which is preceded by local point symmetry breaking is stabilized at low temperatures, as predicted by quantum theories involving multipolar spin interactions. 
[1] L. Lu,  et al., Nat. Commun., 8, 14407 (2017)
 

Session: Emerging Science, time: 4:40pm-5:20pm

Clinical Hyperpolarized 129Xe MRI – Past, Present, and Future   


Bastuaan Driehuys
Duke University, Durham, NC
MRI using hyperpolarized 129Xe gas was introduced nearly 25 years ago, and although it has experienced a tortuous clinical and commercial development path, is now beginning to live up to its original promise. 129Xe MRI is now in Phase III clinical trials for FDA approval for ventilation imaging, and its high solubility and large chemical shift of 129Xe are now being exploited for single-breath 3D imaging of pulmonary gas exchange. This opens a fundamentally new approach to diagnosing and monitoring two challenging conditions - interstitial lung disease and pulmonary vascular disease. This talk will cover the history of clinical 129Xe MRI, describe current clinical applications, and discuss emerging opportunities.
 

Session: Emerging Science, time: 5:20pm-6:00pm

Optical 13C hyperpolarization in nanodiamond particles: Avenues for DNP and imagin g   


Ashok Ajoy1; Xudong Lv1; Raffi Nazaryan1; Benjamin Safvati1; Kristina Liu1; Priyanka Raghavan1; Max Gierth1; Emanuel Druga1; Dieter Suter2; Jeffrey Reimer1; Carlos Meriles3; Alex Pines1
1UC Berkeley, Berkeley, CA; 2TU Dortmund, Dortmund, Germany; 3CCNY, New York, NY
We have investigated optically pumped Nitrogen Vacancy defect centers in diamonds at low fields for their use as optical “hyperpolarizing” agents when embedded in nanodiamond particles. We reveal surprising new physics that allows 13C hyperpolarization in randomly oriented diamond particles to be excited with very modest resources and fully at room temperature. Leveraging this we have constructed the first optical nanodiamond hyperpolarizer, a compact device that produces the best reported optical 13C hyperpolarization levels in diamond. This opens the door to the optical hyperpolarization of liquids brought in contact with the high surface area particles. We also demonstrate dual-mode optical and MRI imaging with the hyperpolarized particles.