Efstratios Manousakis

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Efstratios Manousakis (born July 11, 1957) is the Donald Robson Distinguished Professor of Physics at the Florida State University. He is known for his contributions in the area of condensed matter physics. Among his works is his contribution to our understanding of the parent compound of the high-temperature cuprate superconductors, [1] which played a role in founding the relatively new field of quantum magnetism.

Contents

Early life and education

Efstratios Manousakis was born on July 11, 1957, in Ithaca, Greece. He earned his undergraduate degree in 1980 from the University of Athens in Greece. [2] He completed his doctorate in 1985 at the University of Illinois under the supervision of V. R. Pandharipande and David Pines. [3]

Career

From 1985-1987 he was a postdoctoral associate at the Center for Theoretical Physics at the Massachusetts Institute of Technology [3] .In 1987 he was hired at the Florida State University, first, at the Supercomputer Computations Research Institute and from 1988 as a Faculty in Physics. [3]

Research

Manousakis demonstrated that the ground-state of the spin-1/2 Heisenberg antiferromagnet on the square lattice, unlike previous suggestions by Phil Anderson that it is a resonating valence bond state, [4] is instead characterized by long-range antiferromagnetic order. [1] This happens despite the large-amplitude quantum-spin fluctuations expected to be present due to fact that we are dealing with low-spin and low-dimensionality. He also demonstrated that the behavior of the spin-fluctuations in the parent compounds of the high-temperature cuprate-superconductors can be described by the spin-1/2 square-lattice quantum antiferromagnetic Heisenberg model. [1] Manousakis' calculations have also illuminated the nature and propagation of the hole quasi-particle in quantum antiferromagnets as a spin-polaron [5] or as a string [6] and these works have more recently found further application in the area of ultra-cold atoms. [7]

In 2010, he has proposed that efficient solar cells could be made using strongly correlated materials [8] [9] utilizing the concept of carrier multiplication via impact ionization. This idea has recently received theoretical and experimental attention. [10] [11]

He has calculated [12] the quasi-particle phonon-roton spectrum in superfluid 4He that introduce corrections to previous calculations by Feynman and Cohen. [13] This is discussed by David Pines in the book entitled Most of the Good Stuff: Memories of Richard Feynman. [14]

Manousakis has also worked on the nature of consciousness and its possible relation to quantum theory. [15] [16] [17] [18]

Awards and honors

In 2017 he was elected fellow of the American Academy of Arts and Sciences, [19] in 2002 named fellow of the American Physical Society [20] and in 2008 named Fellow of the Institute of Physics. [3]

References

  1. 1 2 3 Manousakis, Efstratios (1991-01-01). "The spin-1/2 Heisenberg antiferromagnet on a square lattice and its application to the cuprous oxides" . Reviews of Modern Physics. 63 (1): 1–62. doi:10.1103/RevModPhys.63.1.
  2. ↑ "Efstratios Manousakis". samos.martech.fsu.edu. Retrieved 2025-07-15.
  3. 1 2 3 4 "Department of Physics - Florida State University". physics.fsu.edu. Retrieved 2025-07-15.
  4. ↑ Anderson, P. W. (1987-03-06). "The Resonating Valence Bond State in La2CuO4 and Superconductivity" . Science. 235 (4793): 1196–1198. doi:10.1126/science.235.4793.1196.
  5. ↑ Liu, Zhiping; Manousakis, Efstratios (1992-02-01). "Dynamical properties of a hole in a Heisenberg antiferromagnet" . Physical Review B. 45 (5): 2425–2437. doi:10.1103/PhysRevB.45.2425.
  6. ↑ Manousakis, Efstratios (2007-01-08). "String excitations of a hole in a quantum antiferromagnet and photoelectron spectroscopy". Physical Review B. 75 (3) 035106. arXiv: cond-mat/0702288 . doi:10.1103/PhysRevB.75.035106.
  7. ↑ Homeier, Lukas; Lange, Hannah; Demler, Eugene; Bohrdt, Annabelle; Grusdt, Fabian (2025-01-02). "Feshbach hypothesis of high-Tc superconductivity in cuprates". Nature Communications. 16 (1): 314. doi:10.1038/s41467-024-55549-4. ISSN   2041-1723. PMC   11696692 .
  8. ↑ Manousakis, Efstratios (2010-09-10). "Photovoltaic effect for narrow-gap Mott insulators". Physical Review B. 82 (12) 125109. arXiv: 0911.4933 . doi:10.1103/PhysRevB.82.125109.
  9. ↑ Coulter, John E.; Manousakis, Efstratios; Gali, Adam (2014-10-30). "Optoelectronic excitations and photovoltaic effect in strongly correlated materials". Physical Review B. 90 (16) 165142. arXiv: 1409.8261 . doi:10.1103/PhysRevB.90.165142.
  10. ↑ Gazzaneo, Paolo; Arrigoni, Enrico (2025-03-01). "Phonon effects, impact ionization and power conversion in Mott photovoltaic systems". New Journal of Physics. 27 (3): 033008. doi: 10.1088/1367-2630/adb877 . ISSN   1367-2630.
  11. ↑ Sahu, S. R.; Khan, S.; Tripathy, A.; Dey, K.; Bano, N.; Raj Mohan, S.; Joshi, M. P.; Verma, S.; Rao, B. T.; Sathe, V. G.; Shukla, D. K. (2023-09-21). "Multiple exciton generation in ${\mathrm{VO}}_{2}$". Physical Review B. 108 (12): 125133. arXiv: 2310.14835 . doi:10.1103/PhysRevB.108.125133.{{cite journal}}: CS1 maint: article number as page number (link)
  12. ↑ Manousakis, E.; Pandharipande, V. R. (1984-11-01). "Theoretical studies of elementary excitations in liquid He 4" . Physical Review B. 30 (9): 5062–5075. doi:10.1103/PhysRevB.30.5062. ISSN   0163-1829.
  13. ↑ Feynman, R. P.; Cohen, Michael (1956-06-01). "Energy Spectrum of the Excitations in Liquid Helium" . Physical Review. 102 (5): 1189–1204. doi:10.1103/PhysRev.102.1189.
  14. ↑ Feynman, Richard P.; Brown, Laurie M.; Rigden, John S., eds. (1993). Most of the good stuff: memories of Richard Feynman. New York: American Institute of Physics. ISBN   978-0-88318-870-5.
  15. ↑ Manousakis, Efstratios (2006-09-27). "Founding Quantum Theory on the Basis of Consciousness". Foundations of Physics. 36 (6): 795–838. arXiv: quant-ph/0604100 . doi:10.1007/s10701-006-9049-9. ISSN   0015-9018.
  16. ↑ Manousakis, Efstratios (2009-11-01). "Quantum formalism to describe binocular rivalry". Biosystems. 98 (2): 57–66. arXiv: 0709.4516 . doi:10.1016/j.biosystems.2009.05.012. ISSN   0303-2647.
  17. ↑ "Could quantum effects explain consciousness?" . New Scientist . 17 October 2007. Retrieved 2025-07-09.
  18. ↑ "A quantum theory of dreams?". The Telegraph. 2007-11-02. Retrieved 2025-07-09.
  19. ↑ "2017 AAAS Fellows Recognized for Advancing Science | American Association for the Advancement of Science (AAAS)". www.aaas.org. Retrieved 2025-07-15.
  20. ↑ "APS Fellows Archive". www.aps.org. Retrieved 2025-07-15.

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