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Sankar Das Sarma

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Sankar Das Sarma
Born1953 (age 70–71)
Kolkata, India
NationalityUnited States
Alma materUniversity of Calcutta
Brown University
Scientific career
FieldsCondensed matter physics
Nanoscience
Quantum information
Theoretical physics
Statistical Physics
InstitutionsUniversity of Maryland, College Park
Doctoral advisorJohn Quinn

Sankar Das Sarma (/ˈʃæŋkɑːr dæʃ ˈʃɑːrmə/) is an India-born American theoretical condensed matter physicist, who has worked in the broad research topics of theoretical physics,[1] condensed matter physics,[2] statistical mechanics,[3] quantum physics,[4] and quantum information.[5] He has been a member of the Department of Physics at University of Maryland, College Park since 1980.[6]

Das Sarma is the Richard E. Prange Chair in Physics,[7] a Distinguished University Professor,[6] a Fellow of the Joint Quantum Institute (JQI), and the Director of the Condensed Matter Theory Center[8] at the University of Maryland, College Park. Das Sarma has co-authored more than 800 articles in the Physical Review Journal series of the American Physical Society, including more than 150 publications in Physical Review Letters.[9][10] Das Sarma coauthored several well-known and highly-cited review articles on spintronics,[11] non-Abelian anyons and topological quantum computation,[12] graphene,[13] and Majorana zero modes.[14] With more than 90,000 citations to his publications and with more than 150 publications garnering more than 100 citations each,[15] he is one of the Institute for Scientific Information (ISI) Highly-Cited Researchers[16] as well as a Web of Science Highly Cited[17] and Most Influential Researcher.[18] Das Sarma has been one of the Highly-Cited Researchers of the Web of Science,[19] continuously during the 2001-2021 time period and is among the most cited theoretical physicists in the 21st century.[10][20][16][21] Das Sarma is the most cited author in the journal npj Quantum Information.[10]

Career

Das Sarma came to the United States of America from India as a physics graduate student in 1974 after finishing his secondary school (Hare School in Kolkata) and undergraduate education at Presidency College in Calcutta, India (now Presidency University in Kolkata) where he was born. He received his PhD in theoretical physics from Brown University in 1979 as a doctoral student of John Quinn.[20]

In collaboration with Chetan Nayak and Michael Freedman of Microsoft Research, Das Sarma introduced the topological qubit in 2005,[22][23] which has led to experiments in building a fault-tolerant quantum computer based on two-dimensional semiconductor structures. Das Sarma's work on graphene has led to the theoretical understanding of graphene carrier transport properties at low densities where the inhomogeneous electron-hole puddles dominate the graphene landscape.[24] In 2006 Das Sarma with Euyheon Hwang provided the basic theory for collective modes and dielectric response in graphene and related chiral two-dimensional materials.[25][26] This work is a Milestone in the Physical Review. [27] In 2011 Das Sarma and collaborators introduced a new class of lattice tight-binding flat-band systems with nontrivial Chern numbers which belongs to the universality class of continuum quantum Hall and fractional quantum Hall systems without any external magnetic fields.[28] Such flat-band tight-binding systems with non-trivial Chern numbers have substantially enhanced the types of possible physical systems for the realization of topological matter.

Among Das Sarma's other well-known theoretical contributions to condensed matter physics are: the self-consistent electronic structure calculation of semiconductor heterojunction-based high electron mobility transistor structures, electron-phonon interaction induced polaron effects in low dimensional systems, collective excitation and quasiparticle modes in semiconductor structures such as quantum wire, quantum well and superlattice, hot electron relaxation in semiconductors, quantum Anderson localization, many-body effects and electron-electron interaction in semiconductors, canted antiferromagnetic states in quantum Hall effect, various spin transistor systems, magnetic polaron theory of diluted magnetic semiconductors,[29] coupled spin qubits in semiconductor quantum dots, theory of quantum decoherence of localized electron spins in solids, central spin decoherence problem, spectral diffusion of electron spins in solids, dynamical decoupling and quantum control, quantum transport theory in low dimensional semiconductors, bilayer quantum Hall systems, and realistic solid-state effects in the fractional quantum Hall effect phenomena, e.g, the Zhang-Das Sarma model.[30]

In 2010, Das Sarma and collaborators, made a prediction that Majorana fermions will be found in condensed matter,[31] in particular, in semiconductor nanowires. [32] [33] This has led to considerable experimental activity, led by Microsoft Corporation, to produce a topological quantum computer.[34]

Das Sarma also made important contributions to the classical statistical mechanics problem of dynamical growth of systems far from equilibrium where his work introduced the standard model for understanding the molecular beam epitaxy of thin film growth, both from a continuum field theory viewpoint in terms of the so-called Villain-Lai-Das Sarma equation[35] and from the discrete atomistic viewpoint in terms of the so-called Das Sarma-Tamborenea model.[36]

Das Sarma has mentored many PhD students and postdoctoral research associates at the University of Maryland, having supervised 30 PhD students and 115 postdoctoral fellows in the 1985–2016 period, with about 80 of these advisees working as theoretical physicists and physics professors all over the world.[37] Das Sarma's research collaborators, as reflected in the co-authors of his scholarly publications, exceed 200 and span six continents. Although Das Sarma has spent his entire academic life as a faculty member at Maryland, he has been a visiting professor at many institutions during his professional career, including Technical University of Munich, IBM Thomas J. Watson Research Center, University of Hamburg, Cambridge University, University of California, Santa Barbara, University of New South Wales, Sandia National Laboratories, University of Melbourne, Kavli Institute for Theoretical Physics in Santa Barbara, Institute for Theoretical Physics in Beijing, and Microsoft Station Q Research Center.[38]

Books

  • Das Sarma, Sankar; Pinczuk, Aron (2008). Perspectives in Quantum Hall Effects:: Novel Quantum Liquids in Low-Dimensional Semiconductor Structures. Wiley. ISBN 978-0-471-11216-7.
  1. ^ "Profiles". scholar.google.com. Retrieved May 15, 2022.
  2. ^ "Profiles". scholar.google.com. Retrieved May 15, 2022.
  3. ^ "Profiles". scholar.google.com. Retrieved May 15, 2022.
  4. ^ "Profiles". scholar.google.com. Retrieved May 15, 2022.
  5. ^ "Profiles". scholar.google.com. Retrieved May 15, 2022.
  6. ^ a b "Sankar Das Sarma". International Centre for Theoretical Sciences. Retrieved August 30, 2018.
  7. ^ "Das Sarma, Sankar". Department of Physics University of Maryland. Retrieved August 30, 2018.
  8. ^ "Condensed Matter Theory Center webpage". Department of Physics University of Maryland. Retrieved August 30, 2018.
  9. ^ "Sankar Das Sarma CV" (PDF). Department of Physics University of Maryland. August 12, 2016. Retrieved August 30, 2018.
  10. ^ a b c "Sankar Das Sarma publications and citations analysis". exaly. Retrieved October 28, 2022.
  11. ^ "Spintronics: Fundamentals and applications". scholar.google.com. Retrieved May 16, 2022.
  12. ^ "Non-Abelian anyons and topological quantum computation". scholar.google.com. Retrieved May 16, 2022.
  13. ^ "Electronic transport in two-dimensional graphene". scholar.google.com. Retrieved May 16, 2022.
  14. ^ "Majorana zero modes and topological quantum computation". scholar.google.com. Retrieved May 16, 2022.
  15. ^ "Sankar Das Sarma Google Scholar profile". Google Scholar. Retrieved August 30, 2018.
  16. ^ a b "2017 Highly Cited Researchers Archive". Claritive Analytics. Retrieved August 30, 2018.
  17. ^ "Highly Cited Researchers". publons.com. Retrieved July 27, 2021.
  18. ^ "Highly Cited Researchers". publons.com. Retrieved July 27, 2021.
  19. ^ "Highly Cited Researchers".
  20. ^ a b "Das Sarma Receives Third Consecutive Honor as Influential Researcher". University of Maryland. November 18, 2016.
  21. ^ "Das Sarma, Monroe Named 2020 Highly Cited Researchers - UMD Physics". umdphysics.umd.edu. Retrieved July 27, 2021.
  22. ^ Das Sarma, Sankar; Freedman, Michael; Nayak, Chetan (2005). "Topologically Protected Qubits from a Possible Non-Abelian Fractional Quantum Hall State". Physical Review Letters. 94 (16): 166802. arXiv:cond-mat/0412343. Bibcode:2005PhRvL..94p6802D. doi:10.1103/PhysRevLett.94.166802. PMID 15904258. S2CID 8773427.
  23. ^ Nayak, Chetan; Simon, Steven H.; Stern, Ady; Freedman, Michael; Sankar Das Sarma (2007). "Topological Quantum Computation review article in Reviews of Modern Physics, 2008". Reviews of Modern Physics. 80 (3): 1083. arXiv:0707.1889. Bibcode:2008RvMP...80.1083N. doi:10.1103/RevModPhys.80.1083. S2CID 119628297.
  24. ^ Adam, Shaffique; Hwang, E. H.; Galitski, V. M.; Sarma, S. Das (November 20, 2007). "A self-consistent theory for graphene transport". Proceedings of the National Academy of Sciences. 104 (47): 18392–18397. Bibcode:2007PNAS..10418392A. doi:10.1073/pnas.0704772104. ISSN 0027-8424. PMC 2141788. PMID 18003926.
  25. ^ Adam, S.; Hwang, E.H.; Rossi, E.; Das Sarma, S. (2009). "Theory of charged impurity scattering in two-dimensional graphene". Solid State Communications. 149 (27–28): 1072–1079. arXiv:0812.1795. Bibcode:2009SSCom.149.1072A. doi:10.1016/j.ssc.2009.02.041. ISSN 0038-1098. S2CID 330571.
  26. ^ Das Sarma, S.; Adam, Shaffique; Hwang, E. H.; Rossi, Enrico (2011). "Electronic transport in two-dimensional graphene". Reviews of Modern Physics. 83 (2): 407–470. arXiv:1003.4731. Bibcode:2011RvMP...83..407D. doi:10.1103/RevModPhys.83.407. S2CID 118565433.
  27. ^ Hwang, E. H.; Das Sarma, S. (May 11, 2007). "Dielectric function, screening, and plasmons in two-dimensional graphene". Physical Review B. 75 (20): 205418. arXiv:cond-mat/0610561. doi:10.1103/PhysRevB.75.205418. S2CID 117804344.
  28. ^ Sun, Kai; Gu, Zhengcheng; Katsura, Hosho; Das Sarma, S. (June 6, 2011). "Nearly Flatbands with Nontrivial Topology". Physical Review Letters. 106 (23): 236803. arXiv:1012.5864. doi:10.1103/PhysRevLett.106.236803. PMID 21770533. S2CID 22738426.
  29. ^ Das Sarma, S.; Hwang, E. H.; Kaminski, A. (April 9, 2003). "Diluted Magnetic Semiconductors review article in Solid State Communications, 2004". Solid State Communications. 127 (2): 99. arXiv:cond-mat/0304219. Bibcode:2003SSCom.127...99D. doi:10.1016/S0038-1098(03)00337-5. S2CID 97033263.
  30. ^ Zhang, F. C.; Das Sarma, S. (February 15, 1986). "Excitation gap in the fractional quantum Hall effect: Finite layer thickness corrections". Physical Review B. 33 (4): 2903–2905. doi:10.1103/PhysRevB.33.2903. PMID 9938653.
  31. ^ Lewton, Thomas. "The Near-Magical Mystery of Quasiparticles". Quanta Magazine. Retrieved April 8, 2021.
  32. ^ "Retraction of Nature paper puts Majorana research on a new path". Physics World. March 26, 2021. Retrieved July 27, 2021.
  33. ^ Hellemans, Alexander (March 26, 2021). "Majorana research on a new path". Physics World.
  34. ^ "A discussion with Sankar Das Sarma and Chetan Nayak - YouTube". www.youtube.com. Retrieved May 15, 2022.
  35. ^ Lai, Z.-W.; Das Sarma, S. (May 6, 1991). "Kinetic growth with surface relaxation: Continuum versus atomistic models". Physical Review Letters. 66 (18): 2348–2351. Bibcode:1991PhRvL..66.2348L. doi:10.1103/PhysRevLett.66.2348. PMID 10043462.
  36. ^ Das Sarma, S.; Tamborenea, P. (January 21, 1991). "A new universality class for kinetic growth: One-dimensional molecular-beam epitaxy". Physical Review Letters. 66 (3): 325–328. Bibcode:1991PhRvL..66..325D. doi:10.1103/PhysRevLett.66.325. PMID 10043777.
  37. ^ "Former Members". Condensed Matter Theory Center University of Maryland. Retrieved August 30, 2018.
  38. ^ "Station Q website". Station Q Microsoft research group. Archived from the original on May 3, 2007. Retrieved August 30, 2018. {{cite web}}: |archive-date= / |archive-url= timestamp mismatch; January 29, 2008 suggested (help)
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