collaborators

8 papers

cond-mat.mes-hall2026

Quantum-metric Bloch oscillations in weakly inhomogeneous electric fields

M. Maneesh Kumar, Md Kaif Faiyaz, Sayan Sarkar +1

Geometric analogs of Bloch oscillations studied so far have relied on Berry curvature. We show that a weakly inhomogeneous electric field adds a distinct quantum-metric term to sem…

cond-mat.mes-hall2026

Orbital-Splitter Current in Altermagnets

Koushik Ghorai, Sayan Sarkar, Amit Agarwal

In collinear altermagnets, the real-space rotational symmetry of opposite spin sublattices generates a large nonrelativistic spin-splitter current. Orbital transport in this settin…

cond-mat.mes-hall2026

Electric-Polarization Probe of the Magnon Orbital Moment Current in Altermagnet

Sankar Sarkar, Amit Agarwal

Efficient transport of spin and orbital moments, and their electrical detection, are among the main challenges in spintronics and orbitronics. In magnetic insulators, these current…

cond-mat.mes-hall2026

Valleytronics in 2D Materials Roadmap

Kyle L. Seyler, Giancarlo Soavi, Bent Weber +30

Valleytronics exploits non-equivalent energy extrema in the electronic band structure of crystalline solids -- the valley degree of freedom -- to encode, manipulate, and read out i…

cond-mat.mes-hall2026

Extrinsic Spin Splitter Currents in Altermagnets

Sanjay Sarkar, Sayan Sarkar, Amit Agarwal

Altermagnets exhibit momentum-dependent spin splitting despite having zero net magnetization. This enables a spin-splitter effect in which an external electric field generates tran…

cond-mat.mes-hall2025

Band geometric transverse current driven by inhomogeneous AC electric field

M. Maneesh Kumar, Sanjay Sarkar, Amit Agarwal

We develop a semiclassical theory for electron wavepacket dynamics in the presence of an inhomogeneous AC electric field. While static electric-field gradients are known to generat…