26 citations · 130 across the 12 of their papers we have counts for
11 papers · 1 filter
Phases and phase transitions of an chain on metallic and semi-metallic surfaces
Bimla Danu, Fakher F. Assaad
Motivated by recent scanning tunneling microscopy experiments on chains of Co adatoms on Cu surfaces, we investigate the physics of a spin- Heisenberg chain with single-ion an…
Breakdown of heavy quasiparticles in a honeycomb Kondo lattice: A quantum Monte Carlo study
Marcin Raczkowski, Bimla Danu, Fakher F. Assaad
We show that for the half-filled Kondo lattice model on the honeycomb lattice a Kondo breakdown occurs at small Kondo couplings within the magnetically ordered phase. Our con…
Spin chain on a metallic surface: Dissipation-induced order vs. Kondo entanglement
Bimla Danu, Matthias Vojta, Tarun Grover +1
We explore the physics of a spin-1/2 Heisenberg chain with Kondo interaction, , to a two-dimensional electron gas. At weak the problem maps onto a Heisenberg chain local…
Super universality of dimerised spin chains
A. M. M. Pruisken, Bimla Danu, R. Shankar
We explore the physics of the quantum Hall effect using the Haldane mapping of dimerised spin chains, the large expansion and the density matrix renormalization group…
Zooming in on heavy fermions in Kondo lattice models
Bimla Danu, Zihong Liu, Fakher F. Assaad +1
Resolving the heavy fermion band in the conduction electron momentum resolved spectral function of the Kondo lattice model is challenging since, in the weak coupling limit, its spe…
Kondo breakdown in a spin-1/2 chain of adatoms on a Dirac semimetal
Bimla Danu, Matthias Vojta, Fakher F. Assaad +1
We consider a spin-1/2 Heisenberg chain coupled via a Kondo interaction to two-dimensional Dirac fermions. The Kondo interaction is irrelevant at the \textit{decoupled} fixed-point…
Exploring the Kondo effect of an extended impurity with chains of Co adatoms in a magnetic field
Bimla Danu, Fakher Assaad, Frédéric Mila
Motivated by recent STM experiments, we explore the magnetic field induced Kondo effect that takes place at symmetry protected level crossings in finite Co adatom chains. We argue…
Quantum to classical transition in the ground state of a spin- quantum antiferromagnet
Bimla Danu, Brijesh Kumar
We study a frustrated spin- staggered-dimer Heisenberg model on square lattice by using the bond-operator representation for quantum spins, and investigate the emergence of clas…
Extended degeneracy and order by disorder in the square lattice J-J-J model
Bimla Danu, Gautam Nambiar, R. Ganesh
The square lattice antiferromagnet with frustrating next nearest neighbour coupling continues to generate tremendous interest, with an elusive quantum disordered phase in the vicin…
Effective models for the magnetization behavior of Shastry-Sutherland model
Brijesh Kumar, Bimla Danu
The minimal effective model for the magnetisation plateaus below 1/2 in the Shastry-Sutherland model is derived to be an Ising model of certain unit-cell hard-core bosons with anis…
DMRG studies on linear-exchange quantum spin models in one dimension
Bimla Danu, Brijesh Kumar, Ramesh V. Pai
We study a class of spin-1/2 quantum antiferromagnetic chains using DMRG technique. The exchange interaction in these models decreases linearly as a function of the separation betw…