Tata Institute of Fundamental Research

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19912026

most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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Showing 2015 · cond-mat.str-elShow all

22 papers · 2 filters

cond-mat.str-el2015★ 18 cited

Vacancies in the Kitaev quantum spin liquids on the 3D hyper-honeycomb lattice

G. J. Sreejith, Subhro Bhattacharjee, R. Moessner

We study the effect of adding disorder to the exactly solvable Kitaev model on the hyper-honeycomb lattice, which hosts both gapped and gapless spin liquid phases with an emergent…

cond-mat.str-el2015★ 1 cited

Two-step melting of three-sublattice order in $S = 1$ easy-axis triangular lattice antiferromagnets

Dariush Heidarian, Kedar Damle

We consider $S = 1$ triangular lattice Heisenberg antiferromagnets with a strong single-ion anisotropy $D$ that dominates over the nearest-neighbour antiferromagnetic exchange $J$ . I…

cond-mat.str-el2015★ 15 cited

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…

cond-mat.str-el2015★ 4 cited

Bilayer honeycomb lattice with ultracold atoms: Multiple Fermi surfaces and incommensurate spin density wave instability

Santanu Dey, Rajdeep Sensarma

We propose an experimental setup using ultracold atoms to implement a bilayer honeycomb lattice with Bernal stacking. In presence of a potential bias between the layers and at low…

cond-mat.str-el2015★ 55 cited

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 $S = 1/2$ models with competing antiferromagnetic i…

cond-mat.str-el2015★ 28 cited

Parity-time symmetry-breaking mechanism of dynamic Mott transitions in dissipative systems

Vikram Tripathi, Alexey Galda, Himadri Barman +1

We describe the critical behavior of electric field-driven (dynamic) Mott insulator-to-metal transitions in dissipative Fermi and Bose systems in terms of non-Hermitian Hamiltonian…

cond-mat.str-el2015★ 35 cited

Classical spin-liquid on the maximally frustrated honeycomb lattice

J. Rehn, Arnab Sen, Kedar Damle +1

We show that the honeycomb Heisenberg antiferromagnet with $J_{1} /2 = J_{2} = J_{3}$ , where $J_{1/2/3}$ are first-, second- and third-neighbour couplings respectively, forms a classical spin…

cond-mat.str-el2015★ 20 cited

A Kondo route to spin inhomogeneities in the honeycomb Kitaev model

S. D. Das, K. Dhochak, V. Tripathi

Paramagnetic impurities in a quantum spin-liquid can result in Kondo effects with highly unusual properties. We have studied the effect of locally exchange-coupling a paramagnetic…

cond-mat.str-el2015★ 11 cited

Electronic nature of the lock-in magnetic transition in CeXAl4Si2

J. Gunasekera, L. Harriger, A. Dahal +6

We have investigated the underlying magnetism in newly discovered single crystal Kondo lattices CeXAl4Si2, where X = Rh, Ir. We show that the compound undergoes an incommensurate-t…

cond-mat.str-el2015★ 30 cited

Kagome chiral spin liquid as a gauged U(1) symmetry protected topological phase

Yin-Chen He, Subhro Bhattacharjee, Frank Pollmann +1

While the existence of a chiral spin liquid (CSL) on a class of spin-1/2 kagome antiferromagnets is by now well-established numerically, a controlled theoretical path from the latt…

cond-mat.str-el2015★ 3 cited

Anisotropic physical properties of PrRhAl $_{4}$ Si $_{2}$ single crystal a non-magnetic singlet ground state compound

Arvind Maurya, Ruta Kulkarni, A. Thamizhavel +1

We have grown the single crystal of PrRhAl $_{4}$ Si $_{2}$ , which crystallizes in the tetragonal crystal structure. From the low temperature physical property measurements like, magnetic…

cond-mat.str-el2015★ 21 cited

Acoustic signatures of the phases and phase transitions in Yb $_{2}$ Ti $_{2}$ O $_{7}$

Subhro Bhattacharjee, S. Erfanifam, E. L. Green +11

We report on measurements of the sound velocity and attenuation in a single crystal of the candidate quantum- spin-ice material Yb $_{2}$ Ti $_{2}$ O $_{7}$ as a function of temperature and m…

cond-mat.str-el2015

Magnetocaloric effect and magnetic phase diagram of EuRhAl4Si2

Arvind Maurya, A. Thamizhavel, P. Bonville +1

EuRhAl4Si2, crystallizes in tetragonal crystal structure and orders antiferromagnetically at ~12 K. The isothermal magnetization along the two principle directions is highly anisot…

cond-mat.str-el2015★ 76 cited

Bosonic Integer Quantum Hall effect in an interacting lattice model

Yin-Chen He, Subhro Bhattacharjee, R. Moessner +1

We study a bosonic model with correlated hopping on a honeycomb lattice, and show that its ground state is a bosonic integer quantum Hall (BIQH) phase, a prominent example of a sym…

cond-mat.str-el2015★ 30 cited

Z2 topological liquid of hard-core bosons on a kagome lattice at 1/3 filling

Krishanu Roychowdhury, Subhro Bhattacharjee, Frank Pollmann

We consider hard-core bosons on the kagome lattice in the presence of short range repulsive interactions and focus particularly on the filling factor 1/3. In the strongly interacti…

cond-mat.str-el2015★ 14 cited

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…

cond-mat.str-el2015★ 3 cited

Optical Lattice Modulation Spectroscopy for Spin-orbit Coupled Bosons

Sangita De Sarkar, Rajdeep Sensarma, K. Sengupta

Interacting bosons with two "spin'' states in a lattice show novel superfluid-insulator phase transitions in the presence of spin-orbit coupling. Depending on the parameter regime,…

cond-mat.str-el2015★ 22 cited

Magnetic properties and complex magnetic phase diagram in non centrosymmetric EuRhGe $_{3}$ and EuIrGe $_{3}$ single crystals

Arvind Maurya, P. Bonville, R. Kulkarni +2

We report the magnetic properties of two Eu based compounds, single crystalline EuIrGe $_{3}$ and EuRhGe $_{3}$ , inferred from magnetisation, electrical transport, heat capacity and $^{1…

cond-mat.str-el2015★ 2 cited

Weakening of the spin density wave gap at low temperatures in SrFe $_{2}$ As $_{2}$ single crystals

Anirban Dutta, Neeraj Kumar, A. Thamizhavel +1

We report on temperature dependent scanning tunneling microscopy and spectroscopy studies of undoped SrFe $_{2}$ As $_{2}$ single crystals from 6 K to 292 K. Resistivity data show spi…

cond-mat.str-el2015★ 59 cited

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…

cond-mat.str-el2015★ 7 cited

Enhanced conduction band density of states in intermetallic EuTSi $_{3}$ (T=Rh, Ir)

A. Maurya, P. Bonville, A. Thamizhavel +1

We report on the physical properties of single crystalline EuRhSi $_{3}$ and polycrystalline EuIrSi $_{3}$ , inferred from magnetisation, electrical transport, heat capacity and $^{151}$ E…

cond-mat.str-el2015★ 20 cited

Kondo lattice and antiferromagnetic behavior in quaternary CeTAl $_{4}$ Si $_{2}$ (T~=~Rh, Ir) single crystals

Arvind Maurya, R. Kulkarni, A. Thamizhavel +2

We report the synthesis and the magnetic properties of single crystalline CeRhAl $_{4}$ Si $_{2}$ and CeIrAl $_{4}$ Si $_{2}$ and their non magnetic La-analogs. The single crystals of these quat…