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11 papers · 2 filters
Quasiparticle metamorphosis in the random t-J model
Aman Kumar, Subir Sachdev, Vikram Tripathi
Motivated by the pseudogap-Fermi liquid transition in doped Mott insulators, we examine the excitations of a - model with random and all-to-all hopping and exchange. The stab…
Weak antilocalization and Shubnikov-de Haas oscillations in CaCuSb single crystal
Souvik Sasmal, Vikas Saini, Nicolas Bruyant +5
Quantum oscillations in both linear and Hall resistivities and weak antilocalization (WAL) are barely observed in bulk single crystals. Here we report the transport properties of a…
Valence fluctuation in CeReSi and Ising-type magnetic ordering in PrReSi single crystals
Suman Sanki, Vikash Sharma, Souvik Sasmal +5
Single crystals of and have been grown by Czochralski method in a tetra-arc furnace. Powder x-ray diffraction confirmed that these compoun…
Behavior of gapped and ungapped Dirac cones in an antiferromagnetic topological metal, SmBi
Anup Pradhan Sakhya, Shiv Kumar, Arindam Pramanik +10
We studied the behavior of nontrivial Dirac fermion states in an antiferromagnetic metal SmBi using angle-resolved photoemission spectroscopy (ARPES). The experimental results exhi…
Magnetic frustration and paramagnetic state transport anomalies in Ho4RhAl and Er4RhAl: Possible test cases for newly identified roles of itinerant electrons
Ram Kumar, E. V. Sampathkumaran
We report the results of magnetic, heat-capacity, electrical and magnetoresistance measurements on Ho4RhAl and Er4RhAl, characterized by 3 sites for rare-earths (R). Antiferromagne…
In-depth Analysis of Anisotropic Magnetoconductance in BiSe thin films with electron-electron interaction corrections
Satyaki Sasmal, Joynarayan Mukherjee, Dhavala Suri +1
A combination of out-of-plane and in-plane magnetoconductance (MC) study in topological insulators (TI) is often used as an experimental technique to probe weak anti-localization (…
Linear unsaturated magnetoresistance in YSi single crystal
Vikas Saini, Souvik Sasmal, Ruta Kulkarni +1
Linear magnetoresistance is a phenomenon that has been observed in a few topological compounds that originate from classical and quantum phenomena. Here, we performed electrical tr…
Topological Hall effect in the antiferromagnetic Dirac semimetal EuAgAs
Antu Laha, Ratnadwip Singha, Sougata Mardanya +4
The non-trivial magnetic texture in real space gives rise to the intriguing phenomenon of topological Hall effect (THE), which is relatively less explored in topological semimetals…
Minimal model for Hilbert space fragmentation with local constraints
Bhaskar Mukherjee, Debasish Banerjee, K. Sengupta +1
Motivated by previous works on a Floquet version of the PXP model [Mukherjee {\it et al.} Phys. Rev. B 102, 075123 (2020), Mukherjee {\it et al.} Phys. Rev. B 101, 245107 (2020)],…
Resummation-based updates for Stochastic Series Expansion Quantum Monte Carlo
Nisheeta Desai, Sumiran Pujari
For spin rotational symmetric models with a positive-definite high-temperature expansion of the partition function, a stochastic sampling of the series expansion upon partial resum…
Fermi surface studies of a non-trivial topological compound YSi
Vikas Saini, Souvik Sasmal, Ruta Kulkarni +2
The Fermi surface properties of a nontrivial system YSi is investigated by de Haas-van Alphen (dHvA) oscillation measurements combined with the first-principle calculations. Three…