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18 papers · 2 filters
A reentrant superspin glass state and magnetization steps in the oxyborate Co2AlBO5
Jitender Kumar, Soumendra Nath Panja, Deepak John +3
An oxyborate Co2AlBO5 belonging to the ludwigite family is investigated using structural, thermodynamic, dielectric and magnetic measurements. Magnetic measurements indicate that t…
Edge--Entanglement correspondence for gapped topological phases with symmetry
Maciej Koch-Janusz, Kusum Dhochak, Erez Berg
The correspondence between the edge theory and the entanglement spectrum is firmly established for the chiral topological phases. We study gapped, topologically ordered, non-chiral…
Non-collinear Order and Spin-Orbit Coupling in SrZnIrO
P. A. McClarty, A. D. Hillier, D. T. Adroja D. D. Khalyavin +4
SrZnIrO is an effective spin one-half Mott insulating iridate belonging to a family of magnets which includes a number of quasi-one dimensional systems as well as mater…
Crystal structure and anisotropic magnetic properties of new ferromagnetic Kondo lattice compound Ce(Cu,Al,Si)2
A. Maurya, A. Thamizhavel, S. K. Dhar +3
Single crystals of the new compound CeCu0.18Al0.24Si1.58 have been grown by high-temperature solution growth method using a eutectic Al-Si mixture as flux. This compound is derived…
Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe0.5Cr0.5O3
Mohit K. Sharma, Tathamay Basu, K. Mukherjee +1
We report the results of our investigations on the influence of partial substitution of Er and Gd for Dy on the magnetic and magnetoelectric properties of DyFe0.5Cr0.5O3, which is…
Spin-glass behavior and pyroelectric anomalies in a new lithium-based oxide, Li3FeRuO5
Sanjay Kumar Upadhyay, P. L. Paulose, Kartik K Iyer +1
The results of dc and ac magnetization, heat-capacity, 57Fe Moessbauer spectroscopy, dielectric, pyroelectric current and isothermal magneto-capacitance measurements on a recently…
Superconductivity from Doublon Condensation in the Ionic Hubbard Model
Abhisek Samanta, Rajdeep Sensarma
In the ionic Hubbard model, the onsite repulsion , which drives a Mott insulator and the ionic potential , which drives a band insulator, compete with each other to open up a…
Magnetism of a rhombohedral-type pyrochlore-derived Kagome series, Mn2R3Sb3O14 (R= Rare-earths)
Venkatesh Chandragiri, Kartik K Iyer, K. Maiti +1
The results of magnetic investigations on a new series of compounds, Mn2R3Sb3O14, containing 2-dimensional Kagome lattice of R ions and belonging to pyrochlore series, are presente…
Magnetic behavior of Gd3Ru4Al12, a layered compound with a distorted Kagome net
Venkatesh Chandragiri, Kartik K Iyer, E. V. Sampathkumaran
The magnetic behavior of the compound, Gd3Ru4Al12, which has been reported to crystallize in a hexagonal structure about two decades ago, had not been investigated in the past lite…
Exploring metamagnetism of single crystalline \eun\ by neutron scattering
X. Fabreges, A. Gukasov, P. Bonville +3
We present here a neutron diffraction study, both in zero field and as a function of magnetic field, of the magnetic structure of the tetragonal intermetallic \eun\ on a single cry…
Insight into the magnetism of a distorted Kagome lattice, Dy3Ru4Al12, based on polycrystalline studies
Venkatesh Chandragiri, Kartik K Iyer, E. V. Sampathkumaran
The layered compound with distorted Kagome nets, Dy3Ru4Al12, was previously reported to undergo antiferromagnetic ordering below (TN=) 7 K, based on investigations on single crysta…
Frustrated Ising chains on the triangular lattice in SrNiIrO
S. Toth, W. Wu, D. T. Adroja +2
Inelastic neutron scattering study on the spin-chain compound SrNiIrO reveals gapped quasi-1D magnetic excitations. The observed one-magnon band between 29.5 and 39 meV con…
Bridging coupled wires and lattice Hamiltonian for two-component bosonic quantum Hall states
Yohei Fuji, Yin-Chen He, Subhro Bhattacharjee +1
We investigate a model of hard-core bosons with correlated hopping on the honeycomb lattice in an external magnetic field by means of a coupled-wire approach. It has been numerical…
A Matrix Model for Non-Abelian Quantum Hall States
Nick Dorey, David Tong, Carl Turner
We propose a matrix quantum mechanics for a class of non-Abelian quantum Hall states. The model describes electrons which carry an internal SU(p) spin. The ground states of the mat…
Field-driven quantum phase transitions in spin chains
Adam Iaizzi, Kedar Damle, Anders W. Sandvik
We study the magnetization process of a 1D extended Heisenberg model, the - model, as a function of an external magnetic field. In this model, represents the traditional…
Quantum critical magneto-transport at a continuous metal-insulator transition
P. Haldar, M. S. Laad, S. R. Hassan +2
In contrast to the seminal weak localization prediction of a non-critical Hall constant () at the Anderson metal-insulator transition (MIT), in quite a few real diso…
Ferromagnetic ordering of minority Ce spins in a quasi-skutterudite CeOsGe single crystal
Om Prakash, A. Thamizhavel, S. Ramakrishnan
We report site disorder driven ferromagnetic ordering of nearly 8 Ce atoms in single crystalline CeOsGe below 0.5~K. CeOsGe crystallizes i…
Vacancy-induced low-energy states in undoped graphene
Sambuddha Sanyal, Kedar Damle, Olexei I. Motrunich
We demonstrate that a nonzero concentration of static, randomly-placed vacancies in graphene leads to a density of zero-energy quasiparticle states at the band-center $ε=…