Assistant Professor of Physics - Quantum Materials and Technologies
University of Nebraska
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Two EQUATE-supported, multidisciplinary teams with many of the same researchers are developing processes that allow scientists to better see into the nanoscale and harness possibilities of the quantum realm. The two projects each had papers published in prestigious research journals in the same week of May.
Researchers on the first team detail their novel technique using nitrogen vacancy-based magnetometry to study the magnetic properties of individual iron-triazole spin crossover nanorods and nanoparticle clusters; their paper was published in the May 9 edition of ACS Nano.
Researchers on the second team used an emerging, ultra-thin host material to increase the brightness of single-photon emitters by 200%; their paper was published in the May 3 edition of Advanced Optical Materials.
Arjun Subedi, a Ph.D. graduate student with Peter Dowben's group has been named one of eight finalists for the 2023 AVS National Student Awards. The Awards include a cash award, a certificate, and reimbursed travel expenses to attend the AVS 69th International Symposium and Exhibition in Portland, Oregon, November 5-10, 2023. The title of Subedi's abstract is Temperature Dependent Magnetic and Electronic Properties of NiCo2O4 Thin Film Surfaces.
The 2023 Nebraska Research and Innovation Conference (NRIC) on March 17 gathered nearly 100 attendees, including dozens from the Emergent Quantum Materials and Technologies (EQUATE) project. Speakers for this year’s NRIC event came from across the nation to share their expertise on Topology and Valley-Driven Quantum Phenomena. The event’s poster sessions also featured nearly 40 presentations of research by Nebraska’s EQUATE students and postdoctoral researchers. Photo caption: NRIC 2023 poster award recipients included (from left) Kun Wang, Kai Huang, Ufuk Kilic, and Jia Wang.
Robert Streubel, assistant professor with the University of Nebraska-Lincoln Department of Physics and Astronomy, was recognized by the Royal Society of Chemistry journal Nanoscale as one of approximately 100 “rising stars of nanoscience and nanotechnology research.” Streubel is part of EQUATE’s Focused Research Group 1 team; his research on the electronic structure of cobalt valence tautomeric molecules in different environments—a collaboration with EQUATE colleagues Peter Dowben, Rebecca Lai and others--was featured in the journal’s special edition. Click here to read the study.
Evgeny Tsymbal and an international team have demonstrated how to construct, control and explain the oxygen-deprived walls of a nanoscopically thin material suited to next-gen electronics. These walls can talk in several electronic dialects that could allow the devices housing them to store even more data and they can retain their data states even if their devices turn off. Tsymbal's team published its findings in the journal Nature. (2/13/23)
Nebraska EQUATE invites its participants and partners to learn and network to advance quantum science innovation
The 2023 Nebraska Research and Innovation Conference (NRIC) -- Topology and Valley-Driven Quantum Phenomena -- will take place Friday, March 17, at the Embassy Suites Hotel in downtown Lincoln. This all-day meeting includes invited speakers and poster sessions with EQUATE students and post-doctoral researchers.
Mohammad Ghashami, mechanical and materials engineering, and Martin Centurion, physics and astronomy, were both recently awarded SEED grants from the Emergent Quantum Materials and Technologies project to study quantum topics in their work. Centurion's project is titled: Characterization of the ultrafast structural response in photoexcite materials. Ghashami's project is titled: Quantum Size Effect on Radiative and Electronic Transport.
A paper authored by Chrisitan Binek, Jeff Shield, and colleagues from North Carolina A&T (NCAT) was recently published in the Journal of Applied Physics. The article "Large refrigerant capacity in superparamagnetic iron nanoparticles embedded in a thin film matrix" was also chosen by AIP's editors to be featured in a "Scilight" - a science highlight showcasing the most interesting research published in AIP Publishing Journals. Relatedly, NCAT was also recently awarded a $10 million grant from the Department of Energy to establish a center focused on clean energy initiatives led by paper co-author Dhananjay Kumar.
Teamwork by Hong and Schubert leads investigation of remote surface optical phonon scattering in ferroelectric oxide-gated graphene
The October 2022 edition of the Journal of Applied Physics features research from a collaboration led by EQUATE physicist Xia Hong and engineer Mathias Schubert. Their study reveals the room temperature mobility limit in graphene imposed by the ferroelectric oxide gate, providing important material information for designing high-performance ferroelectric/graphene transistors for high frequency, low power nanoelectronic applications. Learn more at https://aip.scitation.org/doi/full/10.1063/5.0106939.
The Nebraska Center for Materials and Nanoscience (NCMN) is pleased to
announce that the National Science Foundation has decided to fund its Major Research
Instrumentation proposal, "Acquisition of optical access in a cryogenic scanning probe microscope for quantum
sensing capabilities." This instrument will leverage the existing scanning probe microscopy
capabilities at NCMN and add the first commercial quantum sensing device to the set of
characterization facilities at NCMN. There are only a few instruments of this kind available
throughout the country. The EQUATE researchers behind this project are PI Christian Binek and
co-PI's Xia Hong, Abdelghani Laraoui, and Xiaoshan Xu.
We can’t wait to set the system up and see it producing scientific results. (8/18/22)
Researchers from the University of Nebraska-Lincoln and the University of California, Berkeley, have developed a new photonic device that could get scientists closer to the “holy grail” of finding the global minimum of mathematical formulations at room temperature. Finding that elusive mathematical value would be a major advancement in opening new options for simulations involving quantum materials. Wei Bao is the corresponding author of a paper reporting this research, published in Nature Materials. (6/17/22)
A study published six years ago by Mathias Schubert planted the seeds for what grew into an international collaboration and the discovery of a new material class that could impact the future of emerging biotechnology and nanotechnology. Schubert and his colleagues had their latest paper, Hyperbolic shear polaritons in low-symmetry crystals, published in Nature. The group believes their results “will motivate new directions for polariton physics … greatly expanding the material base and extending design opportunities for compact photonic devices.”
Christian Binek, Peter Dowben, Will Echtenkamp, Ather Mahmood, and colleagues from the University at Buffalo have teamed up to fabricate a new type of transistor that could curb energy consumption of microelectronics and reduce the number of transistors needed to store certain data by as much as 75%. This new transistor could cut 5 percent from the world's digital energy budget while also saving space and retaining memory in the event of a power loss.
Christos Argyropoulos and graduate students Boyuan Jin and Dhananjay Mishra published an article titled ‘‘Efficient Single-Photon Pair Generation by Spontaneous Parametric Down-Conversion in Nonlinear Plasmonic Metasurfaces” in the journal Nanoscale. Journal editors selected the paper to be featured on the cover, an honor given to the best papers of each issue.
Quantum simulators are key tools in the study of quantum systems, but their use is limited because they must operate with bulky ultra-low-temperature vacuum systems beyond the capacity of many research labs. With a five-year, $756,713 grant from the National Science Foundation’s Faculty Early Career Development Program, Wei Bao hopes to find a way to make those simulators function at room temperature; this would greatly expand the scope and accessibility of work with quantum simulators.
Mourning the death of Ralph Skomski
Dr. Ralph Skomski suddenly passed away at home on April 10. Skomski was a gifted theoretical researcher, publishing over 425 papers, books, and book chapters in his career. He was a Fellow of the American Physical Society and a member of the Editorial Boards of IEEE Magn. Lett., J. Phys. D and J. Magn. Magn. Mater. Skomski began working at UNL as a Visiting Assistant Professor in 1998. He was promoted to Research Assistant Professor in 2000, Research Associate Professor in 2003, and Research Full Professor in 2012. He was an active researcher working for many years with Professor David Sellmyer. (4/19/22)
Nebraska EPSCoR is sponsoring its annual Nebraska Research and Innovation Conference (NRIC) to provide our research community the opportunity to elevate their work with expert speaker sessions plus networking during lunch and a poster session. The 2022 NRIC theme is Commercializing Quantum Technologies in Nebraska: From Research To Licensing.Learn More
Applications are open for Young Nebraska Scientists (YNS) summer programs throughout the state in 2022, including day camps for middle school students and residential or virtual camps for high school students. Visit https://yns.nebraska.edu/ for more information and to apply. Applications are due by May 1.Learn More
In this episode of the “Nano Matters” podcast, Xia Hong, Associate Professor in the Department of Physics and Astronomy at the University of Nebraska-Lincoln, describes how she and her team are creating and studying complex oxide nanostructures and interfaces for advanced electronics.Listen Here
Evgeny Tsymbal, Ding-Fu Shao and their colleagues have charged to the forefront of spintronics, a next-gen class of data storage and processing poised to complement the digital electronics that have ruled the realm of high tech for decades. Ahead of that future, though, loom nanoscale obstacles whose size belies their difficulty. With the wind of a $20 million National Science Foundation grant at their back, the physicists may be on their way to surmounting an especially tricky one: finding order amid disorder and data amid seeming disarray. Beyond that obstacle lie two prizes, density and speed, that could make modern-day devices look gluttonous and sloth-like in hindsight.Read Full Story
A five-year, $20 million award from the National Science Foundation’s Established Program to Stimulate Competitive Research is positioning the University of Nebraska and partnering institutions to lead a second quantum revolution. It creates the Emergent Quantum Materials and Technologies collaboration, a research and education cluster to boost the state’s capacity and competitiveness in the field. A Research Infrastructure Improvement-Track 1 award supports the project.Read Full Story
Christian Binek's presentation introduces and highlights the peculiarities of the second quantum revolution by contrasting it with the more familiar first quantum revolution, which gave rise to much of today’s high-technology. The presenter will provide examples for the theory-guided search, fabrication and characterization of emergent quantum materials and show how they enable quantum technologies with applications in sensing, communication, medicine, banking and national security. He will also highlight the specific role Nebraska’s EQUATE center plays in this global megatrend, which includes the race for quantum supremacy of future quantum computers.Read Full Story
In 2021, Nebraska EPSCoR was able to support two cohorts of FIRST Award recipients—one set funded in January by the NSF EPSCoR Research Infrastructure Improvement programs’ Track-1 Center for Root and Rhizobiome Innovation (CRRI), and another group in November that was funded by Nebraska’s new Track-1 Emergent Quantum Materials and Technologies, “EQUATE.”Read Full Story
In October 2021, two Nebraska scientists were awarded SEED grants from the EQUATE project to study quantum topics in their research. Funding of $56,000 for each selected topic comes from the National Science Foundation (NSF) via Nebraska’s NSF EPSCoR RII Track-1 project, “Emergent Quantum Materials and Technologies (EQUATE)".Read Full Story
The National Science Foundation is advancing quantum research through an investment of $20 million, over five years, to Nebraska through NSF’s Established Program to Stimulate Competitive Research... José Colom-Ustáriz, an NSF EPSCoR program director said, "This project furthers Nebraska’s strategic priority to advance knowledge in quantum phenomena. It has the potential to benefit society through research outcomes, workforce development and STEM education and training, specifically in Native American and rural communities." "Read Full Story
"Through a five-year, $20 million grant from the National Science Foundation's Established Program to Stimulate Competitive Research — better known as EPSCoR — a total of 20 researchers and educators will work to push the field of quantum materials forward."Read Full Story