195 citations · 2.1k across the 71 of their papers we have counts for
71 papers
First Order Topological Phase Transitions and Disorder Induced Majorana Modes in Interacting Fermion Chains
Shruti Agarwal, Shreekant Gawande, Satoshi Nishimoto +2
Using a combination of the mean-field Bogoliubov deGennes (BdG) approach and the Density Matrix Renormalization Group (DMRG) method, we discover first order topological transitions…
Engineering antiferromagnetic skyrmions and antiskyrmions at metallic interfaces
Arnob Mukherjee, Deepak S. Kathyat, Sanjeev Kumar
We identify a mechanism to convert skyrmions and antiskyrmions into their antiferromagnetic (AFM) counterparts via interfacial engineering. The key idea is to combine properties of…
Spin- impurities with XXZ anisotropy in a spin-1/2 Heisenberg chain
Ayushi Singhania, Masahiro Kadosawa, Yukinori Ohta +2
We study the effect of anisotropy of spin- impurities on an antiferromagnetic SU(2) Heisenberg chain. The magnetic impurities are assumed to have an XXZ-type anisotropic exchang…
Complexity analysis of quantum teleportation via different entangled channels in the presence of noise
Deepak Singh, Sanjeev Kumar, Bikash K. Behera
Quantum communication is one of the hot topics in quantum computing, where teleportation of a quantum state has a slight edge and gained significant attention from researchers. A l…
Counterdiabatic route for preparation of state with long-range topological order
Sanjeev Kumar, Shekhar Sharma, Vikram Tripathi
We propose here a counterdiabatic (CD) strategy for fast preparation of a state with long-range topological order by magnetic field tuning of an initial separable state. For concre…
Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
Swagatam Nayak, Navketan Batra, Sanjeev Kumar
By introducing the possibility of equal- and opposite-spin pairings concurrently, we show that the extended attractive Hubbard model (EAHM) exhibits rich ground state phase diagram…
Antiskyrmions and Bloch Skyrmions in Magnetic Dresselhaus Metals
Deepak S. Kathyat, Arnob Mukherjee, Sanjeev Kumar
We present a microscopic electronic description of how antiskyrmions can be stabilized in a Dresselhaus spin-orbit coupled magnetic metal. Furthermore, we show that the antiskyrmio…
Rare-earth tuned magnetism and magnetocaloric effects in double perovskites NiMnO
Anzar Ali, Kanika Pasrija, Gyaneshwar Sharma +2
We present a comprehensive experimental study of magnetization and magnetocaloric effect (MCE) in double perovskite (DP) materials NiMnO with Pr, Nd, Sm, Gd, Tb, and…
Topological Transitions in a Model for Proximity Induced Superconductivity
Navketan Batra, Swagatam Nayak, Sanjeev Kumar
Using a prototype model for proximity induced superconductivity on a bilayer square lattice, we show that interlayer tunneling can drive change in topology of the Bogoliubov quasip…
Exotic Superconductivity in the Extended Attractive Hubbard Model
Swagatam Nayak, Sanjeev Kumar
We show that the extended attractive Hubbard model on a square lattice hosts a variety of superconducting phases, including exotic mixed-symmetry phases with $d_{x^2-y^2} + {\rm i}…
Search for the differences in Atmospheric Neutrinos and Antineutrinos oscillation parameters at the INO-ICAL Experiment
Daljeet Kaur, Zubair Ahmad Dar, Sanjeev Kumar +1
In this paper, we present a study to measure the differences between the atmospheric neutrino and anti-neutrino oscillations in the Iron-Calorimeter detector at the India-based Neu…
Carrier driven coupling in ferromagnetic oxide heterostructures
Ching-Hao Chang, Sujit Das, Sanjeev Kumar +1
Transition metal oxides are well known for their complex magnetic and electrical properties. When brought together in heterostructure geometries, they show particular promise for s…
Tunneling of Hybridized Pairs of Electrons through a One-Dimensional Channel
Godfrey Gumbs, Danhong Huang, Julie Hon +2
Recently, the electron transport through a quasi-one dimensional (quasi-1D) electron gas was investigated experimentally as a function of the confining potential. We present a phys…
A quantum phase transition detected through one dimensional ballistic conductance
Abolfazl Bayat, Sanjeev Kumar, Michael Pepper +1
A quantum phase transition is an unequivocal signature of strongly correlated many-body physics. Signatures of such phenomena are yet to be observed in ballistic transport through…
Large Magnetocaloric effect and magnetic phase transitions in NdNiMnO
Gyaneswar Sharma, Kanika Pasrija, Anzar Ali +2
We present combined experimental and theoretical investigations on the magnetic and magnetocaloric behavior of NdNiMnO. The relative cooling power (RCP) which quantifies th…
Dynamic transition from Mott-like to metal-like state of the vortex lattice in a superconducting film with a periodic array of holes
Indranil Roy, Prashant Chauhan, Harkirat Singh +6
We show that under an a.c. magnetic field excitation the vortex lattice in a superconductor with periodic array of holes can undergo a transition from a Mott-like state where each…
Zeros in the magic neutrino mass matrix
Radha Raman Gautam, Sanjeev Kumar
We study the phenomenological implications of the presence of two zeros in a magic neutrino mass matrix. We find that only two such patterns of the neutrino mass matrix are experim…
Effective Hamiltonian based Monte Carlo for the BCS to BEC crossover in the attractive Hubbard model
Kanika Pasrija, Prabuddha B. Chakraborty, Sanjeev Kumar
We present an effective Hamiltonian based real-space approach for studying the weak-coupling Bardeen-Cooper-Schrieffer (BCS) to the strong-coupling Bose-Einstein condensate (BEC) c…
Noncollinear and noncoplanar magnetic order in the extended Hubbard model on anisotropic triangular lattice
Kanika Pasrija, Sanjeev Kumar
Motivated by the importance of non-collinear and non-coplanar magnetic phases in determining various electrical properties of magnetic materials, we investigate the phase diagrams…
Electronic route to stabilize nanoscale spin textures in itinerant frustrated magnets
Sahinur Reja, Jeroen van den Brink, Sanjeev Kumar
We unveil novel spin textures in an itinerant fermion model on a frustrated triangular lattice in the limit of low electronic density. Using hybrid Monte Carlo simulations on finit…
Anomalous X-Ray Galactic signal from 7 keV spin- dark matter decay
Sukanta Dutta, Ashok Goyal, Sanjeev Kumar
In order to explain the recently reported peak at keV in the galactic x-ray spectrum, we propose a simple model. In this model, the Standard Model is extended by including a…
Self assembled Wigner crystals as mediators of spin currents and quantum information
Bobby Antonio, Abolfazl Bayat, Sanjeev Kumar +2
Technological applications of many-body structures that emerge in gated devices under minimal control are largely unexplored. Here we show how emergent Wigner crystals in a semicon…
Coupled spin-charge order in frustrated itinerant triangular magnets
Sahinur Reja, Rajyavardhan Ray, Jeroen van den Brink +1
We uncover four new spin-charge ordered ground states in the strong coupling limit of the Kondo lattice model on triangular geometry. Two of the states at one-third electronic fill…
Many-body effects in a quasi-one-dimensional electron gas
Sanjeev Kumar, Kalarikad J. Thomas, Luke W. Smith +6
We have investigated electron transport in a quasi-one dimensional (quasi-1D) electron gas as a function of the confinement potential. At a particular potential configuration, and…