Girsh Blumberg

Multipolar interactions and related ordering phenomena have attracted great interest. Multipoles are related to exotic phases including possible multipole-fluctuation induced superconductivity and hidden-order phase. For a systematic investigation of the collective behaviors of multipole moments, f-electron systems are suitable choices since the interplay of spin and orbital degrees of freedom of f-electrons facilitates multipole formation. …

New Paper Published: Lattice dynamics, crystal-field excitations and quadrupolar fluctuations of YbRu2Ge2 Read More »

We are exceptionally proud to announce that Mai Ye has won the Peter Lindenfeld Graduate Fellowship. The fellowship, established to honor Professor Emeritus Lindenfeld, supports a Physics and Astronomy graduate student who exemplifies the teacher-scholar model of learning pioneered by Prof. Lindenfeld. We want to celebrate Mai for his excellence in both scholarship and mentorship!

We are proud to announce that Alex’s poster, “Resonant Raman Scattering in the Giant Rashba System BiTeI“, won the Leszek Wielunski Award for Best Poster Presentation at the 33rd Annual Symposium of the Laboratory for Surface Modification (LSM). Congrats to Alex for winning this prestigious award!

We are proud to announce that Sean Kung’s dissertation, “Collective excitations in the antisymmetric channel of Raman spectroscopy”, is the recipient of the 2019 Northeast Association of Graduate Schools Outstanding Doctoral Dissertation Award. His story is highlighted in the Rutgers Physics News. Congrats to Sean for winning this prestigious award!

We observe composite particles — chiral excitons — residing on the surface of a topological insulator (TI), Bi2Se3. Unlike other known excitons composed of massive quasiparticles, chiral excitons are the bound states of surface massless electrons and surface massive holes, both subject to strong spin–orbit coupling which locks their spins and momenta into chiral textures. …

Observation of chiral surface excitons in a topological insulator Bi2Se3 — Optical orientation of exciton’s angular momentum Read More »

Long-range order of multipoles, namely high-rank electric or magnetic moments, has been attracting great interest. For example, second-rank quadrupolar moments could lead to novel phenomena including quadrupolar Kondo effect and quadrupole-fluctuation-mediated superconductivity. f-electron systems are suitable choices to study multipolar interactions and ordering phenomena by virtue of the interplay of the spin and orbital degrees …

New Paper Published: Raman spectroscopy of f-electron metals: an example of CeB6 Read More »

We are exceptionally proud to announce that our Dr. Hesiang-Hsi (Sean) Kung has been selected to become the Rutgers nominee for the Northeastern Association of Graduate Schools 2019 Doctoral Dissertation Award! His story is highlighted in the School of Graduate Studies (SGS) Grad News.

We are proud to announce that Dr. Hsiang-Hsi (Sean) Kung has been awarded the 2018 Richard J. Plano Dissertation Prize. This Prize is awarded to the graduate student with the best Ph.D. dissertation this academic year. For more information please see here. Also congratulations to undergraduate student Viktor Krapivin for receiving the Richard T. Weidner …

Congratulations to Hsiang-Hsi (Sean) Kung and Viktor Krapivin for their Department Awards Read More »

Authors:  W.-L.Zhang, W.R.Meier, T.Kong, P.C.Canfield and G. Blumberg Abstract:  The B2g symmetry Raman response shows no signatures of Pomeranchuk-like electronic nematic fluctuations which is observed for many other Fe-based superconductors. In the superconducting state, we identify three pair-breaking peaks at 13.8, 16.9 and 21 meV and full spectral weight suppression at low energies. The pair-breaking …

High Tc superconductivity in CaKFe4As4 in absence of nematic fluctuations Read More »

Shangfei Wu gives his thesis defense and earns his doctoral degree after the successful presentation! Congratulations to our new Dr. Wu!