PAN 214 (office), 612-301-1817
PAN 353 (lab)
vpribiag @ umn.edu
I am particularly interested in the basic physics and possible device applications of novel states of matter, such as 2D topological insulators, topological superconductors and Majorana zero-modes.
Our interest lies in the design, nanofabrication and experimental study of nanoscale devices based on novel low-dimensional materials, such as quantum spin Hall insulators (2D topological insulators), complex oxide interfaces and semiconductor nanowires. Our current research explores two main directions: topological superconductivity in hybrid semiconductor-superconductor systems, and spin manipulation in low-dimensional structures (quantum dots, spin-helical liquids and 2D topological insulators).
Topological superconductivity is a fascinating condensed matter phase that is predicted to host Majorana zero-modes. When attached to a local defect such as a domain wall, Majorana modes, unlike conventional fermions, are expected to show non-Abelian exchange statistics. Because of their exotic properties and their topological robustness, Majoranas have become very important in the nascent field of topological quantum computing, which aims to exploit topological protection for decoherence-free quantum information processing.
Low-dimensional semiconductors with strong spin-orbit coupling open up avenues for exploring novel spin physics. For example, the spin orientation can be coupled to the electron propagation direction by applying a magnetic field along the nanowire. We are interested in the intriguing possibility of using such spin-helical modes as spin filters or to couple single spins from separate quantum dots.
Alfred P. Sloan Research Fellow (2017-2019)
NSF CAREER Award (2016-2021)
NSF MRSEC Seed (2016-2017)
Innovational Research Incentives Scheme (VENI) Grant - Netherlands Organization for Scientific Research (NWO) - (2011-2014)
Peng Xu, Yilikal Ayino, Christopher Cheng, Vlad S. Pribiag, Ryan B. Comes, Peter V. Sushko, Scott A. Chambers, and Bharat Jalan, Predictive Control over Charge Density in the Two-Dimensional Electron Gas at the Polar-Nonpolar NdTiO3/SrTiO3 Interface, Phys. Rev. Lett. 117, 106803 (2016) [abstract]
Vlad S. Pribiag, Arjan J. A. Beukman, Fanming Qu, Maja C. Cassidy, Christophe Charpentier, Werner Wegscheider, and L. P. Kouwenhoven, Edge Mode Superconductivity in a Two Dimensional Topological Insulator, Nature Nanotechnology 10, 593-596 (2015) [abstract]
V. S. Pribiag, S. Nadj-Perge, S. M. Frolov, J. van den Berg, I. van Weperen, S. R. Plissard, E. P. A. M. Bakkers, and L. P. Kouwenhoven, Electrical control of single hole spins in nanowire quantum dots, Nature Nanotechnology 8, 170-174 (2013) [abstract]
J. W. G. van den Berg, S. Nadj-Perge, V. S. Pribiag, S. R. Plissard, E. P. A. M. Bakkers, S. M. Frolov, and L. P. Kouwenhoven, Fast spin-orbit qubit in an indium antimonide nanowire, Phys. Rev. Lett. 110, 066806 (2013)
S. Nadj-Perge, V. S. Pribiag, J. W. G. van den Berg, K. Zuo, S. R. Plissard, E. P. A. M. Bakkers, S. M. Frolov, and L. P. Kouwenhoven, Spectroscopy of spin-orbit quantum bits in indium antimonide nanowires, Phys. Rev. Lett. 108, 16680 (2012) [abstract]
V. S. Pribiag, G. Finocchio, B. J. Williams, D. C. Ralph, and R. A. Buhrman, Long-timescale fluctuations in zero-field magnetic vortex oscillations driven by dc spin-polarized current, Phys. Rev. B 80, 180411(R) (2009) [abstract]
V. S. Pribiag, I. N. Krivorotov, G. D. Fuchs, P. M. Braganca, O. Ozatay, J. C. Sankey, D. C. Ralph, R. A. Buhrman, Magnetic vortex oscillator driven by d.c. spin-polarized current, Nature Physics 3, 498-503 (2007)