313 citations · 3.2k across the 79 of their papers we have counts for
49 papers · 1 filter
Vacancy-induced local moments in quantum paramagnetic phases: An SU() designer Hamiltonian study
Md Zahid Ansari, Souvik Kundu, Kedar Damle
We explore the effects of non-magnetic impurities (vacancy disorder) on the quantum paramagnetic phases stabilized by SU() designer Hamiltonians on bipartite lattices. Using the…
confined and deconfined Coulomb liquids in pyrochlore magnets
Jay Pandey, Souvik Kundu, Kedar Damle
We identify an interesting regime in the physics of pyrochlore magnets in which spin-orbit and crystal field effects lead to {\em two} low-lying magnetic doublets that can be model…
Magnetic effects of non-magnetic impurities in gapped short-range resonating valence bond spin liquids
Md Zahid Ansari, Kedar Damle
We study the effect of a small density of quenched non-magnetic impurities, i.e. vacancy disorder, in gapped short-range resonating valence bond (RVB) spin liquid states and…
Competition between Neel, Haldane nematic, plaquette valence bond solid, and valence bond solid phases in SU(N) analogs of square-lattice antiferromagnets
Souvik Kundu, Nisheeta Desai, Kedar Damle
We use stochastic series expansion (SSE) quantum Monte Carlo (QMC) methods to study the phases and transitions displayed by a class of sign-free designer Hamiltonians for SU() a…
Theory of collective topologically-protected Majorana fermion excitations of networks of localized Majorana modes
Kedar Damle
Predictions of localized Majorana modes, and ideas for manipulating these degrees of freedom, are the two key ingredients in proposals for physical platforms for Majorana quantum c…
Quantum half-orphans in kagome antiferromagnets
Pranay Patil, Fabien Alet, Sylvain Capponi +1
We numerically study the effects of non-magnetic impurities (vacancies) in the spin- Heisenberg antiferromagnet on the kagomé lattice. For a range of low but nonzero temperature…
Emergent moments and random singlet physics in a Majorana spin liquid
S. Sanyal, K. Damle, J. T. Chalker +1
We exhibit an exactly solvable example of a SU(2) symmetric Majorana spin liquid phase, in which quenched disorder leads to random-singlet phenomenology. More precisely, we argue t…
Efficient quantum cluster algorithms for frustrated transverse field Ising antiferromagnets and Ising gauge theories
Sounak Biswas, Kedar Damle
Working within the Stochastic Series Expansion (SSE) framework, we construct efficient quantum cluster algorithms for transverse field Ising antiferromagnets on the pyrochlore latt…
Metamagnetism and zero-scale-factor universality in the two-dimensional - model
Adam Iaizzi, Kedar Damle, Anders W. Sandvik
Using a combination of quantum Monte Carlo and exact methods, we study the field-driven saturation transition of the two-dimensional - model, in which the antiferromagnetic H…
Semiclassical theory for liquid-like behaviour of the frustrated magnet
Sounak Biswas, Kedar Damle
We identify the low energy effective Hamiltonian that is expected to describe the low temperature properties of the frustrated magnet $\mathrm{Ca}_{10}\mathrm{Cr}_{7}\mathrm{O}_{28…
Field-driven quantum phase transitions in spin chains
Adam Iaizzi, Kedar Damle, Anders W. Sandvik
We study the magnetization process of a 1D extended Heisenberg model, the - model, as a function of an external magnetic field. In this model, represents the traditional…
Vacancy-induced low-energy states in undoped graphene
Sambuddha Sanyal, Kedar Damle, Olexei I. Motrunich
We demonstrate that a nonzero concentration of static, randomly-placed vacancies in graphene leads to a density of zero-energy quasiparticle states at the band-center $ε=…
Two-step melting of three-sublattice order in easy-axis triangular lattice antiferromagnets
Dariush Heidarian, Kedar Damle
We consider triangular lattice Heisenberg antiferromagnets with a strong single-ion anisotropy that dominates over the nearest-neighbour antiferromagnetic exchange . I…
Quantum cluster algorithm for frustrated Ising models in a transverse field
Sounak Biswas, Geet Rakala, Kedar Damle
Working within the stochastic series expansion framework, we introduce and characterize a new quantum cluster algorithm for quantum Monte Carlo simulations of transverse field Isin…
Sign-problem-free Monte Carlo simulation of certain frustrated quantum magnets
Fabien Alet, Kedar Damle, Sumiran Pujari
We introduce a Quantum Monte Carlo (QMC) method which efficiently simulates in a sign-problem-free way a broad class of frustrated models with competing antiferromagnetic i…
Classical spin-liquid on the maximally frustrated honeycomb lattice
J. Rehn, Arnab Sen, Kedar Damle +1
We show that the honeycomb Heisenberg antiferromagnet with , where are first-, second- and third-neighbour couplings respectively, forms a classical spin…
Random Coulomb antiferromagnets: from diluted spin liquids to Euclidean random matrices
J. Rehn, Arnab Sen, Alexei Andreanov +3
We study a disordered classical Heisenberg magnet with uniformly antiferromagnetic interactions which are frustrated on account of their long-range Coulomb form, {\em i.e.} $J(r)\s…
Transitions to valence-bond solid order in a honeycomb lattice antiferromagnet
Sumiran Pujari, Fabien Alet, Kedar Damle
We use Quantum Monte-Carlo methods to study the ground state phase diagram of a S=1/2 honeycomb lattice magnet in which a nearest-neighbor antiferromagnetic exchange J (favoring Né…
Resonating valence-bond physics on the honeycomb lattice
Pranay Patil, Ishita Dasgupta, Kedar Damle
We study bond and spin correlations of the nearest-neighbour resonating valence bond (RVB) wavefunction for a SU() symmetric antiferromagnet on the honeycomb lattice. We…
Surprise(s) in magnets without net moments
K. Damle
We are all familiar with ferromagnetic and antiferromagnetic materials, in which the localized ionic moments (in case of ionic insulators) or the electronic spins (in case of metal…
Low temperature ordering in easy-axis kagome and triangular lattice antiferromagnets
K. Damle
A brief review is provided of earlier work on the low temperature phases of kagome and triangular lattice antiferromagnets in which there is sufficiently strongly single-ion…
Néel to valence-bond solid transition on the honeycomb lattice: Evidence for deconfined criticality
Sumiran Pujari, Kedar Damle, Fabien Alet
We study a spin-1/2 SU(2) model on the honeycomb lattice with nearest-neighbor antiferromagnetic exchange that favors Néel order, and competing 6-spin interactions which fa…
Vacancy-induced spin textures and their interactions in a classical spin liquid
Arnab Sen, Kedar Damle, R. Moessner
Motivated by experiments on the archetypal frustrated magnet SrCrGaO (SCGO), we study the classical Heisenberg model on the pyrochlore slab (Kagomé bilayer)…
Antiferromagnetic order in systems with doublet ground states
Sambuddha Sanyal, Argha Banerjee, Kedar Damle +1
We use projector Quantum Monte-Carlo methods to study the doublet ground states of two dimensional antiferromagnets on a square lattice with…