170 citations · 568 across the 10 of their papers we have counts for
10 papers
Resolving molecular diffusion and aggregation of antibody proteins with megahertz X-ray free-electron laser pulses
Mario Reiser, Anita Girelli, Anastasia Ragulskaya +26
X-ray free-electron lasers (XFELs) with megahertz repetition rate can provide novel insights into structural dynamics of biological macromolecule solutions. However, very high dose…
Fermionic spin liquid analysis of the paramagnetic state in Volborthite
Li Ern Chern, Robert Schaffer, Sopheak Sorn +1
Recently, thermal Hall effect has been observed in the paramagnetic state of Volborthite, which consists of distorted Kagome layers with local moments. Despite the appearan…
Quantum Spin Liquid in a Breathing Kagome Lattice
Robert Schaffer, Yejin Huh, Kyusung Hwang +1
Motivated by recent experiments on the vanadium oxyfluoride material DQVOF, we examine possible spin liquid phases on a breathing kagome lattice of S=1/2 spins. By performing a pro…
Recent progress on correlated electron systems with strong spin-orbit coupling
Robert Schaffer, Eric Kin-Ho Lee, Bohm-Jung Yang +1
Emergence of novel quantum ground states in correlated electron systems with strong spin-orbit coupling has been a recent subject of intensive studies. While it has been realized t…
Topological spinon semimetals and gapless boundary states in three dimensions
Robert Schaffer, Eric Kin-Ho Lee, Yuan-Ming Lu +1
Recently there has been much effort in understanding topological phases of matter with gapless bulk excitations, which are characterized by topological invariants and protected int…
Heisenberg-Kitaev model on hyperhoneycomb lattice
Eric Kin-Ho Lee, Robert Schaffer, Subhro Bhattacharjee +1
Motivated by recent experiments on LiIrO, we study the phase diagram of the Heisenberg-Kitaev model on a three dimensional lattice of tri-coordinated Ir, dubbed…
Spin-orbital liquids in non-Kramers magnet on Kagome lattice
Robert Schaffer, Subhro Bhattacharjee, Yong Baek Kim
Localized magnetic moments with crystal-field doublet or pseudo-spin 1/2 may arise in correlated insulators with even number of electrons and strong spin-orbit coupling. Such a non…
Quantum Phase Transition in Heisenberg-Kitaev Model
Robert Schaffer, Subhro Bhattacharjee, Yong Baek Kim
We explore the nature of the quantum phase transition between a magnetically ordered state with collinear spin pattern and a gapless spin liquid in the Heisenberg-Kitaev mode…
Average Heating Rate of Hot Atmospheres in Distant Clusters by Radio AGN: Evidence for Continuous AGN Heating
C. -J. Ma, B. R. McNamara, P. E. J. Nulsen +2
We examine atmospheric heating by radio active galactic nuclei (AGN) in distant X-ray clusters by cross correlating clusters selected from the 400 Square Degree (400SD) X-ray Clust…
Superfluid and supersolid phases of lattice bosons with ring-exchange interaction
Robert Schaffer, Anton A. Burkov, Roger G. Melko
We examine the superfluid phase of a hard-core boson model with nearest-neighbor exchange J and four-particle ring-exchange K at half-filling on the square lattice. At zero tempera…