Center for Functional Nanomaterials Seminar

Quantum materials are attracting an increasing level of attention in order to understand and fully exploit their innovative potential applications. At NSLS-II, we are interested in investigating their relevant electronic phases, their dynamics and their coherence length scales in an effort to produce a consistent microscopic picture of their functionalities and response to external stimuli. CSX beamline exploits the high coherence and stability of our source in the soft x-ray regime to image (raster scanning) and to reconstruct (inverse Fourier methods) the domain structures in sub-100 nm range and to carry out scattering experiments as a function of temperature (10 - 350 K). Thanks to our fast CCD detector, time correlations in the range 10-2 to 104 s are accessible. Application of electric fields (up to 2 keV) and currents (up to few 100 mA) both in steady and pulsed regime are possible, mimicking Operando conditions for electronic devices. Aside from scattering, fluorescence and total electron yield are implemented as parallel detection chains, providing spectroscopic information with sub-eV resolution. In my talk, I will present some recent investigation on quantum materials performed at NSLS-II, focusing on their band structure, electronic order parameters and interactions, inhomogeneity and time evolution. Examples will include charge ordering in cuprate HTSC, magnetic ordering in artificial patterned samples and nickelates, holography on in situ controlled exotic magnetic phases in multilayers. Host: Anibal Boscoboinik