90 citations · 469 across the 23 of their papers we have counts for
21 papers · 1 filter
Landscape of incompressible crystals of hard-core bosons on the square-kagome lattice
Pratyay Ghosh
We investigate a hard-core boson model on the square-kagome lattice using hierarchical mean-field theory beyond the conventional unit-cell description. We show that the conventiona…
Zoology of Altermagnetic-type Non-collinear Magnets on the Maple Leaf Lattice
Pratyay Ghosh, Ronny Thomale
We define unconventional non-collinear magnetic ground states on the maple leaf lattice (MLL) distinguished by the selective breaking or preservation of time reversal ($\mathcal{T}…
Tensor-network study of the ground state of maple-leaf Heisenberg antiferromagnet
Samuel Nyckees, Pratyay Ghosh, Frédéric Mila
We study the quantum phase diagram of the spin- nearest-neighbor Heisenberg model on the maple-leaf lattice using infinite projected entangled pair states (iPEPS) combined wit…
Simplex Crystal Ground State and Magnetization Plateaus in the Spin- Heisenberg Model on the Ruby Lattice
Pratyay Ghosh, Frédéric Mila
We investigate the spin- Heisenberg antiferromagnet on the ruby lattice with uniform first- and second-neighbor interactions, which forms a two-dimensional network of corner-s…
Symmetry breaking and competing valence bond states in the star lattice Heisenberg antiferromagnet
Pratyay Ghosh, Jan Koziol, Samuel Nyckees +2
We investigate the ground state phase diagram of the spin- antiferromagnetic Heisenberg model on the star lattice using infinite projected entangled pair states (iPEPS) and hi…
Chiral crossroads in : a tale of frustration in maple leaf lattice
Pratyay Ghosh
Motivated by the recent observation of a uniform vector chirality (UVC) magnetic order in the maple-leaf lattice (MLL) realization via powder neutron scatterin…
Where is the spin liquid in maple-leaf quantum magnet?
Pratyay Ghosh
We investigate the possibility of exotic phenomena, viz. quantum spin liquid (QSL) or deconfined quantum critical point (DQCP), in the spin- Heisenberg model on the ma…
Phase diagram of the - Heisenberg Model on the Maple-Leaf Lattice: Neural networks and density matrix renormalization group
Jonas Beck, Jonathan Bodky, Johannes Motruk +3
We microscopically analyze the nearest neighbor Heisenberg model on the maple-leaf lattice through neural quantum states (NQS) and infinite density matrix renormalization group (iD…
Magnetization of Antiferromagnetic Cactus Graph Model with Exact Dimer Ground State
Pratyay Ghosh
We introduce and explore the magnetization behavior in a quantum spin system on a cactus graph, deemed the Cactus Graph Model (CGM), featuring an exact dimer singlet ground state.…
Effective spin-1 breathing kagome Hamiltonian induced by the exchange hierarchy in the maple leaf mineral bluebellite
Pratyay Ghosh, Tobias Müller, Yasir Iqbal +2
As a highly frustrated model Hamiltonian with an exact dimer ground state, the Heisenberg antiferromagnet on the maple leaf lattice is of high theoretical interest, and a material…
Exact quantum ground state of a two-dimensional quasicrystalline antiferromagnet
Pratyay Ghosh
We present the exact dimer ground state of a quantum antiferromagnet defined on a quasicrystal constructed from the Bronze-mean hexagonal quasicrystal. A coupling isotropy on the f…
Maple Leaf Antiferromagnet in a Magnetic Field
Pratyay Ghosh, Jannis Seufert, Tobias Müller +2
We analyze the quantum antiferromagnet on the maple leaf lattice in the presence of a magnetic field. Starting from its exact dimer ground state and for a magnetic field strength o…
Pinch-points to half-moons and up in the stars: the kagome skymap
Dominik Kiese, Francesco Ferrari, Nikita Astrakhantsev +9
Pinch point singularities, associated with flat band magnetic excitations, are tell-tale signatures of Coulomb spin liquids. While their properties in the presence of quantum fluct…
Another Exact Ground State of a 2D Quantum Antiferromagnet
Pratyay Ghosh, Tobias Müller, Ronny Thomale
We present the exact dimer ground state of a quantum antiferromagnet on the maple-leaf lattice. A coupling anisotropy for one of the three inequivalent nearest-neighbor bonds is su…
Pinwheel valence-bond-crystal ground state of the spin- Heisenberg antiferromagnet on the lattice
Nikita Astrakhantsev, Francesco Ferrari, Nils Niggemann +9
We investigate the nature of the ground-state of the spin- Heisenberg antiferromagnet on the lattice by complementary state-of-the-art numerical techniques,…
Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians
Pratyay Ghosh, Yasir Iqbal, Tobias Müller +6
We address the long-standing problem of the microscopic origin of the richly diverse phenomena in the chromium breathing pyrochlore material family. Combining electronic structure…
Quantum paramagnetism and helimagnetic orders in the Heisenberg model on the body centered cubic lattice
Pratyay Ghosh, Tobias Müller, Francesco Parisen Toldin +5
We investigate the spin Heisenberg model on the body centered cubic lattice in the presence of ferromagnetic and antiferromagnetic nearest-neighbor , second-neighbor…
Quantum and Classical Phases of the Pyrochlore Heisenberg Model with Competing Interactions
Yasir Iqbal, Tobias Müller, Pratyay Ghosh +5
We investigate the quantum Heisenberg model on the pyrochlore lattice for a generic spin in the presence of nearest-neighbor and second-nearest-neighbor exchang…
Spontaneous dimerization and moment formation in the Hida model of spin-1 kagomé antiferromagnet
Pratyay Ghosh, Brijesh Kumar
The Hida model, defined on honeycomb lattice, is a spin-1/2 Heisenberg model of aniferromagnetic hexagons (with nearest-neighbor interaction, ) coupled via ferromagnetic bon…
Intertwined nematic orders in a frustrated ferromagnet
Yasir Iqbal, Pratyay Ghosh, Rajesh Narayanan +3
We investigate the quantum phases of the frustrated spin- -- Heisenberg model on the square lattice with ferromagnetic and antiferromagnetic …
Plaquette-triplon analysis of magnetic disorder and order in a trimerized spin-1 Kagomé antiferromagnet
Pratyay Ghosh, Akhilesh Kumar Verma, Brijesh Kumar
A spin-1 Heisenberg model on trimerized Kagomé lattice is studied by doing a low-energy bosonic theory in terms of plaquette-triplons defined on its triangular unit-cells. The mode…