Works on a range of topics in condensed matter theory, especially in mesoscopic physics, superconductivity and spintronics. Examples include spin filtering and spin splitting due to the spin-orbit interaction, combined with a variety of mechanisms which break time reversal symmetry, decoherence due e.g. to telegraph noise, Josephson junctions with spin-orbit active links, transport via molecular junctions (including full counting of the current distributions and noise), pair breaking which prevent superconductivity due to magnetic impurities, thermoelectricity (e.g. in three-terminal devices), multiferroics, and more.
Research achievements include: Explained spin splitting in chiral molecules, solved a long-standing puzzle on the large persistent current in copper rings, proposed mechanisms to enhance the efficiency of mesoscopic thermoelectric devices, and more.
Future directions continue along all of the above lines.