5 papers
Finite-Size Spectral Signatures of Order by Quantum Disorder: A Perspective from Anderson's Tower of States
Subhankar Khatua, Griffin C. Howson, Michel J. P. Gingras +1
In frustrated magnetic systems with a subextensive number of classical ground states, quantum zero-point fluctuations can select a unique long-range ordered state, a celebrated phe…
Anharmonic Collective Oscillations in Isotropic Spin Systems and their Spectroscopic Signatures
Anna Fancelli, MatÃas G. Gonzalez, Subhankar Khatua +4
Spin waves are the fundamental excitations in magnetically ordered spin systems and are ubiquitously observed in magnetic materials. However, the standard understanding of spin wav…
Universal temperature-dependent power law excitation gaps in frustrated quantum spin systems harboring order-by-disorder
Alexander Hickey, Jeffrey G. Rau, Subhankar Khatua +1
When magnetic moments are subject to competing or frustrated interactions, continuous degeneracies that are not protected by any symmetry of the parent Hamiltonian can emerge at th…
Synthesis and characterization of the novel breathing pyrochlore compound Ba3Tm2Zn5O11
Lalit Yadav, Rabindranath Bag, Ramesh Dhakal +10
In this study, a novel material from the rare-earth based breathing pyrochlore family, Ba3Tm2Zn5O11, was successfully synthesized. Powder x-ray diffraction and high-resolution powd…
Ground state properties of the Heisenberg-compass model on the square lattice
Subhankar Khatua, Griffin C. Howson, Michel J. P. Gingras +1
Compass models provide insights into the properties of Mott-insulating materials that host bond-dependent anisotropic interactions between their pseudospin degrees of freedom. In t…