230 citations · 2.1k across the 72 of their papers we have counts for
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Criticality in coupled quantum spin-chains with competing ladder-like and two-dimensional couplings
Pinaki Sengupta, Weihong Zheng, Rajiv R. P. Singh
Motivated by the geometry of spins in the material CaCuO, we study a two-layer, spin-half Heisenberg model, with nearest-neighbor exchange couplings J and α*J along the two…
Neel to spin-Peierls transition in the ground state of a quasi-1D Heisenberg model coupled to bond phonons
Pinaki Sengupta
The spin-Peierls transition in the ground state of a quasi-one-dimensional spin-1/2 Heisenberg model coupled to adiabatic bond phonons is studied using a quantum Monte Carlo (QMC)…
Specific heat of quasi-2D antiferromagnetic Heisenberg models with varying inter-planar couplings
Pinaki Sengupta, Anders W. Sandvik, Rajiv R. P. Singh
We have used the stochastic series expansion (SSE) quantum Monte Carlo (QMC) method to study the three-dimensional (3D) antiferromagnetic Heisenberg model on cubic lattices with in…
Comment on ``Ground State Phase Diagram of a Half-Filled One-Dimensional Extended Hubbard Model''
A. W. Sandvik, P. Sengupta, D. K. Campbell
In Phys. Rev. Lett. 89, 236401 (2002), Jeckelmann argued that the recently discovered bond-order-wave (BOW) phase of the 1D extended Hubbard model does not have a finite extent in…