The Raman spectroscopy group is focused on studies of charge and spin ordered ground states in strongly correlated electron systems. Our current aim is to investigate them with Raman spectroscopy to find general behavior for materials of different chemical origin (both organic and inorganic).
Click here if you are interested in the Johns Hopkins Raman Users Center.
Publications of our group can be found at Google Scholar
Workshop on Metal-Organic-Frameworks as Quantum Materials
7-9th of May at the Johns Hopkins University
Watch the video of ballet dancers demonstrating a concept of spin
from The Tale of Spin Ice ballet performance directed by Yu Fei Liu.
Yu Fei Liu, choreographer in collaboration with dancers
Music by Heng Lin, Hangover Easy
Many achievements of our group members recognized at the end of the academic year.
Sami received a PURA award and will spend summer in our group doing research on pyrochlore iridates
Derek was accepted to an REU at the University of Maryland and is going to work on this project
Yu Fei got admitted to a graduate school and is going to UC Boulder
Derek and Sami received a recognition in Physics Honors Society
Jazzmin got accepted to Quantum Frontiers Summer School 2025 in Corsica and received an ICAM award to go there
Jesse got into Boulder Summer School for Condensed Matter Physics and also received a Department Travel Award to go there.
Jackson is going to HFM 2025 conference to present his research
Congratulations!!!
We have demonstrated signatures of electronic structure (Weyl nodes) and magnetic ordering which agree with magnetic Weyl semimetal behavior in V1/3NbS2:
We have shown a possibility to tune between charge order and dimer Mott insulator in BEDT-TTF - based materials:
Tuning Charge Order in κ-(BEDT-TTF)2Hg(SCN)2X (X=Br, Cl) via Uniaxial Strain
We have demonstrated that a triangular lattice S=1 magnet NiGa2S4 can be exfoliated down to at least 2 layers. This is the first exotic anitiferromagnet that exists as thin flakes. Our paper is published in Scientific Reports and can be found here
Exfoliation and optical properties of S = 1 triangular lattice antiferromagnet NiGa2S4
Have we found a way to realize a RVB? Our paper on the interactions of spin, lattice, and charge degrees of freedom in a triangular spin liquid S=1/2 candidate k-(BEDT-TTF)2Cu2(CN)3 is published in Phys Rev B as an Editor's suggestion
Novel Dipole-Lattice coupling in the Quantum-Spin-Liquid Material k-(BEDT-TTF)2Cu2(CN)3
Our paper with Predrag Nikolic on electronic scattering of Nd2Ir2O7 and Pr2Ir2o7 demonstrates how Raman scattering can probe Weyl and Luttinger semimetals is published in Phys Rev B as an Editor's suggestion
Possible Weyl-Luttinger phase transition in pyrochlore iridates revealed by Raman scattering
Congratulation to Jesse for receiving an ICAM QuantEmX award. This award will support his visit to ISSP, University of Tokyo, laboratory of our long term collaborator Prof. Minoru Yamashita. Jesse will study charge ordering transition in organic Mott insulators under strain using resistivity and magnetic susceptibility. Jesse will join Natalia, who will be a Visiting Professor at ISSP for two month this summer.
Our paper on the energy separation of the lattice modes and vibrational modes of linkers in magnetic metal-organic frameworks Me-BIF (Me=Co,Ni,Cu) is published in The Journal of Chemical Physics: Raman scattering spectra of boron imidazolate frameworks containing different magnetic ions
Our paper with the group of Natalia Perkins demonstrating quantum spin ice fluctuations of Nd moments in Nd2Ir2O2 is now on arxiv: Ramification of complex magnetism in Nd2Ir2O7observed by Raman scattering spectroscopy
