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6 papers · 2 filters
Effective magnetic correlations in hole-doped graphene nanoflakes
A. Valli, A. Amaricci, A. Toschi +3
The magnetic properties of zig-zag graphene nanoflakes (ZGNF) are investigated within the framework of the dynamical mean-field theory. At half-filling and for realistic values of…
High-temperature large-gap quantum anomalous Hall insulator in ultrathin double perovskite films
Santu Baidya, Umesh V. Waghmare, Arun Paramekanti +1
Motivated by the goal of realizing topological phases in thin films and heterostructures of correlated oxides, we propose here a quantum anomalous Hall insulator (QAHI) in ultrathi…
Physics of ultrathin films and heterostructures of rare earth nickelates
S. Middey, J. Chakhalian, P. Mahadevan +3
The electronic structure of transition metal oxides featuring correlated electrons can be rationalized within the Zaanen-Sawatzky-Allen framework. Following a brief description of…
Boundary-induced spin density waves in linear Heisenberg antiferromagnetic spin chains with
Dayasindhu Dey, Manoranjan Kumar, Zoltán G. Soos
Linear Heisenberg antiferromagnets (HAFs) are chains of spin- sites with isotropic exchange between neighbors. Open and periodic boundary conditions return the same ground s…
An Efficient Density Matrix Renormalization Group Algorithm for Chains with Periodic Boundary Condition
Dayasindhu Dey, Debasmita Maiti, Manoranjan Kumar
The Density Matrix Renormalization Group (DMRG) is a state-of-the-art numerical technique for a one dimensional quantum many-body system; but calculating accurate results for a sys…
Numerical study of incommensurate and decoupled phases of spin-1/2 chains with isotropic exchange J1, J2 between first and second neighbors
Zoltán G. Soos, Aslam Parvej, Manoranjan Kumar
The spin-1/2 chain with isotropic exchange J1, J2 > 0 between first and second neighbors is frustrated for either sign of J1 and has a singlet ground state (GS) for J1/J2 …