Concordia University

http://www.concordia.ca/content/concordia/en/artsci/physics/faculty.html

Dr. Saurabh Maiti, PhD

Assistant Professor, Physics

Office: L-SP 367-05 
Richard J. Renaud Science Complex,
7141 Sherbrooke W.
Phone: (514) 848-2424 ext. 5787
Email: saurabh.maiti@concordia.ca
Website(s): Maiti's Research Group

Career

Assistant Professor, Concordia University, 2019-present.
Postdoctoral Scholar, University of Massachusetts, Amherst, 2017-2019.
Postdoctoral Scholar, University of Florida, Gainesville, 2015-2017.
Dirac Fellow, National High Magnetic Field Lab, Tallahassee, 2013-2015.

Education

PhD. Physics, University of Wisconsin, Madison, 2013.
BTech(Honors), Electronics and Electrical Communications Engg., Indian Institute of Technology, Kharagpur, India, 2007.


Teaching activities

To appear soon...


Research activities

Collective phenomena in spin-orbit coupled systems

Spin-orbit coupling that breaks parity (Rashba andDresselhaus type) results in peculiar quantum properties and new kind of chiralspin waves. Such a coupling typically manifests itself in 2D/quasi 2D systems and also forms the basis of the emerging field of spintronics/magnonics wherethe focus is to perform the typical “electronics” using the high efficiency andcontrollability of spin-based systems. We are interested in identifying andstudying new kinds of spin-waves that 2D materials can host; and exploring theirtopological properties. Some systems we are interested in arehetero-structures/quantum wells, Graphene, transition metaldichalcogenides(TMD), and even cold-atom gases. We are also interested inknowing how these waves couple to spectroscopic probes.

Novel collective modes in systems with a zoo of quantum phases

Some of the most exciting systems in modern condensed matter physics are the high-Tc or unconventional superconductors(SC). The superconductivity in such systems is peculiar, no doubt, but the richness of unexplored territory these systems provide is what keeps everybody on the go. These systems (Fe-based SC, Cu-based SC, Sr2RuO4, etc) always demonstrate some form of magnetism, nematicity, density waves, quantum criticality or any combination of them. To gain some insight into the connection between the ordered state and the material properties, we aim at understanding the nature of collective (spin/charge) excitations that these systems can host in all of the possible ordered states. We then suggest (spectroscopic and scattering) experiments to verify the phenomena.

Gauge fields in 2D lattices

Dimensionality (2D vs 3D) plays a very important role in gauge theories. For example, the electrodynamics can be described by the Maxwell term in the effective action in 2D or 3D. However, only in 2D lies the possibility of an additional entity like the Chern Simons term (if certain discrete symmetries are allowed to be broken). We are interested in understanding the role of fields generated from such terms in 2D lattices like Graphene, Kagome, triangular. We tackle questions like what can give rise to flatbands? How to think about composite fermions in lattices? Can we think of wavefunctions for chiral spin liquids in 2D spin-lattices? 

Transitions in Bi2Se3 leading to chiral-spin waves.
Photo credit: Image from our PRL 119, 136802 (2017).
Matching theory of strongly interacting electrons and a (Raman) scattering experiment.
Non-standard Hoffstadter butterfly in Kagome lattice.
Photo credit: Our figure was featured in PRB Kaleidoscope.

Publications

Featured Work and News

Kaleidoscope in PRB (2019).
Altmetric score of over 100! (2017).
Synopsis in Physics (Dec, 2011).
Synopsis in Physics (Jun, 2011).

Publications and citations:

Google Scholar
Selected Publications
Condmat arXiv

Chapters/Books

Superconductivity from repulsive interactions, Saurabh Maiti and Andrey Chubukov, 
Chapter 15, Novel Superfluids, Vol. 2, ed. by Karl-Heinz Bennemann and John B. Ketterson, Oxford University Press (2015).

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