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Geetha Balakrishnan

Geetha Balakrishnan is a Professor in the Physics Department at the University of Warwick.

She has worked at Warwick since 1991. She has previously worked at the Tata Institute of Fundamental Research in Bombay, India (1989-1991) and also as a Research Fellow in the Physics Department at Warwick (1986-1988).

Research Interests

The growth of single crystals of superconductors, magnetic, and related materials by a variety of techniques, including a large programme of work using optical furnaces for the floating zone technique.

Also low temperature laboratory measurements and neutron scattering studies.

For more details on the research activities of Prof. Geetha Balakrishnan and the other members of the Superconductivity and Magnetism Group please visit our Research Pages.

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Current funded research projects:

EP/T005963/1 "Single Crystal Growth at Warwick" Sep 2019-Sep 2022, £634,595 (PI)

EP/N032128/1 “Skyrmionics: From Magnetic Excitations to Functioning Low-Energy Devices” Programme Grant led by Prof. Peter Hatton, Durham, July 2016-Jan 2023, £5,101,385 (Warwick PI)

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Recently concluded research grants:

EP/M028941/1 “Investigations of the physics underlying the principles of design of rare earth transition metal permanent magnets” Jan 2016-Jun 2020, £931,725 (Co-I)

EP/M028771/1 “Single Crystal Growth at Warwick” July 2015- July 2018, EPSRC, UK, £514,769 (PI)

EP/L014963/1 “Topological Insulators: A study of bulk crystalline and nanomaterials
March 2014-Aug 2017, EPSRC, UK, £616, 679 (PI)

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Selected recent publications:

(For a full list of publications please see link at the bottom of the list)

  • Superconducting quantum interference in twisted van der Waals heterostructures Farrar LS, Nevil A, Lim ZJ, Balakrishnan G, Dale S and Bending S J, Nano Letters 21 6725 (2021)
  • Topological defect-mediated skyrmion annihilation in three dimensions M. T. Birch, D. Cortés-Ortuño, N. D. Khanh, S. Seki, A. Štefančič, G. Balakrishnan, Y. Tokura, and P. D. Hatton, Communications Physics 4, 175 (2021)

  • Deriving the skyrmion Hall angle from skyrmion lattice dynamics. S. R. Brearton, L. A. Turnbull, J. A. T. Verezhak, G. Balakrishnan, P. D. Hatton, G. van der Laan, and T. Hesjedal. Nature Communications 12, 2723 (2021)

  • Chiral singlet superconductivity in the weakly correlated metal LaPt3P P. K. Biswas, S. K. Ghosh, J. Z. Zhao, D. A. Mayoh, N. D. Zhigadlo, X. Xu, C. Baines, A. D. Hillier, G. Balakrishnan, and M. R. Lees. Nature Communications 12, 2504 (2021)

  • Magnetic structure investigation of the intercalated transition metal dichalcogenide V1/3NbS2 A. E. Hall, D. D. Khalyavin, P. Manuel, D. A. Mayoh, F. Orlandi, O. A. Petrenko, M. R. Lees, and G. Balakrishnan. Physical Review B 103, 174431 (2021).

  • Megahertz dynamics in skyrmion systems probed with muon-spin relaxation. T. J. Hicken, M. N. Wilson, K. J. A. Franke, B. M. Huddart, Z. Hawkhead, M. Gomilšek, S. J. Clark, F. L. Pratt, A. Štefančič, A. E. Hall, M. Ciomaga Hatnean, G. Balakrishnan, and T. Lancaster. Physical Review B 103, 024428 (2021).

  • Investigation of the magnetic ground state of GaV4S8 using powder neutron diffraction S. J. R. Holt, C. Ritter, M. R. Lees, and G. Balakrishnan. Journal of Physics: Condensed Matter 33 255802 (2021).

  • Spin Dynamics and Unconventional Coulomb Phase in Nd2Zr2O7 M. Léger, E. Lhotel, M. Ciomaga Hatnean, J. Ollivier, A. R. Wildes, S. Raymond, E. Ressouche, G. Balakrishnan, and S. Petit. Physical Review Letters 126, 247201 (2021).

  • Evidence for the coexistence of time-reversal symmetry breaking and Bardeen-Cooper-Schrieffer-like superconductivity in La7Pd3 D. A. Mayoh, A. D. Hillier, G. Balakrishnan, and M. R. Lees.  Physical Review B 103, 024507 (2021).

  • Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae. L. A. Turnbull, M. T. Birch, A. Laurenson, N. Bukin, E. O. Burgos-Parra, H. Popescu, M. N. Wilson, A. Stefancic, G. Balakrishnan, F. Y. Ogrin, and P. D. Hatton. ACS Nano 15, 387-395 (2021)

  • Real-space imaging of confined magnetic skyrmion tubes, M. T. Birch, D. Cortés-Ortuño, L. A. Turnbull, M. N. Wilson, F. Groß, N. Träger, A. Laurenson, N. Bukin, S. H. Moody, M. Weigand, G. Schütz, H. Popescu, R. Fan, P. Steadman, J. A. T. Verezhak, G. Balakrishnan, J. C. Loudon, A. C. Twitchett-Harrison, O. Hovorka, H. Fangohr, F. Y. Ogrin, J. Gräfe, and P. D. Hatton, Nature Communications 11, 1726 (2020)

  • Crystal Growth by the Floating Zone Method of Ce-Substituted Crystals of the Topological Kondo Insulator SmB6, M. Ciomaga Hatnean, T. Ahmad, M. Walker, M.R. Lees, and G. Balakrishnan. Crystals 10, 827 (2020)

  • Optical Floating Zone Crystal Growth of Rare-Earth Disilicates, R2Si2O7 (R = Er, Ho, and Tm), M. Ciomaga Hatnean, O.A. Petrenko, M.R. Lees, T.E. Orton, and G. Balakrishnan. Crystal Growth and Design 20, 6636-6648 (2020).

  • Structure and magnetism of the skyrmion hosting family GaV4S8-ySey with low levels of substitutions between 0 ≤ y ≤ 0.5 and 7.5 ≤ y ≤ 8. S.J.R. Holt, A. Štefančič, C. Ritter, A.E. Hall, M.R. Lees, and G. Balakrishnan. Physical Review Materials 4, 114413 (2020)

  • Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6 M. Hartstein, H. Liu, Y. T. Hsu, B. S. Tan, M. C. Hatnean, G. Balakrishnan, S. E. Sebastian. Iscience 23, 101632 (2020).

  • Direct observation of the energy gain underpinning ferromagnetic superexchange in the electronic structure of CrGeTe3. MD Watson, I Markovic, F Mazzola, A Rajan, EA Morales, DM Burn, T Hesjedal, G van der Laan, S Mukherjee, TK Kim, C Bigi, I Vobornik, M Ciomaga Hatnean, G Balakrishnan, PDC King. Phys. Rev. B 101 205125 (2020)
  •  Comprehensive surface magnetotransport study of SmB6. YS Eo, S Wolgast, A Rakoski, D Mihalilov, BY Kang, MS Song, BK Cho, M Ciomaga Hatnean, G Balakrishnan, Z Fisk, SR Saha, X Wang, J Paglione, C Kurdak. Phys. Rev. B 101 155109 (2020)
  •  Real-space imaging of confined magnetic skyrmion tubes. MT Birch, D Cortes-Ortuno, LA Turnbull, MN Wilson, F Gross, N Trager, A Laurenson, N Bukin, SH Moody, M Weigand, G Schutz, H Popescu, R Fan, P Steadman, JAT Verezhak, G Balakrishnan, JC Loudon, AC Twitchett-Harrison, O Hovorka, H Fangohr, FY Grin, J Grafe, PD Hatton. Nature Commun. 11 1726 (2020).

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Orcid full publications list:

https://orcid.org/0000-0002-5890-1149

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Full list of publications: Please click on "Researcher ID" to view the list

ResearcherID

geetha_balakrishnan.jpg 

Write to

Department of Physics
University of Warwick
Coventry CV4 7AL
United Kingdom

Contact Details

Office
P236
Telephone
+44 (0)2476573879
E-Mail
G.Balakrishnan(at)warwick.ac.uk