The term frustration refers to lattice systems whose ground state cannot simultaneously
satisfy all the interactions. Frustration is an important property of correlated electron systems …

Quantum spin liquids (QSL) have emerged as a captivating subject within interacting spin
systems that exhibit no magnetic ordering even at the lowest temperature accessible …

The weak Mott insulating regime of the triangular lattice Hubbard model exhibits a rich
magnetic phase diagram as a result of the ring exchange interaction in the spin Hamiltonian …

Motivated by recent terahertz absorption measurements in α-RuCl 3, we develop a theory for
the electromagnetic absorption of materials described by the Kitaev model on the …

Motivated by recent terahertz (THz) spectroscopy measurements in α-RuCl 3, we develop a
theory for magnetoelectric (ME) effects in Mott insulators of d 5 transition metal ions in an …

We study the coupling between conventional (Maxwell) and emergent electrodynamics in
quantum spin ice, a 3+ 1-dimensional U (1) quantum spin liquid. We find that a uniform …

We present an effective Z 2 gauge theory that captures various competing phases in spin-
1/2 kagome lattice antiferromagnets: the topological Z 2 spin liquid (SL) phase, and the 12 …

In this thesis, we study electron spin resonance (ESR) induced by an AC electric field in the
Hubbard model. The weakly correlated and strongly correlated regimes are both …

The quantum nature of electrons emerges in various exotic ways when they are put together
with quantum many-body interactions. In Mott insulating systems with strong electron …