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Prof. Geetha Balakrishnan

Geetha Balakrishnan is a Professorial Research Fellow 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/N032128/1 “Skyrmionics: From Magnetic Excitations to Functioning Low-Energy Devices” Programme Grant led by Prof. Peter Hatton, Durham, July 2016-July 2022, £5,101,385 (Warwick PI)
EP/M028941/1 “Investigations of the physics underlying the principles of design of rare earth transition metal permanent magnets” Jan 2016-Jan 2020, £931,725 (Co-I)
EP/M028771/1 “Single Crystal Growth at Warwick” July 2015- July 2018, EPSRC, UK, £514,769 (PI)

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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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Recent Publications (2016-17):

1. "Fermi surface in the absence of a Fermi liquid in the Kondo insulator SmB6"
M. Hartstein, W.Toews, Y.T. Hsu, B. Zeng, X. Chen, M. Ciomaga Hatnean, Q. R. Zhang, S. Nakamura, A. Padgett, G. Rodway-Gant, J. Berk, M. Kingston, G. Zhang, M. Chan, S. Yamashita, T. Sakakibara, Y.Takano, J. H.Park, L. Balicas, N. Harrison, N. Shitsevalova, G. Balakrishnan, G. Lonzarich, R. Hill, M. L. Sutherland, S. Sebastian
Nature Physics 10.1038/nphys4295.

2. "Coulomb spin liquid in anion-disordered pyrochlore Tb2Hf2O7"
R. Sibille, E. Lhotel, M. Ciomaga Hatnean, G. Nilsen, G. Ehlers, A. Cervellino, E. Ressouche, M. Frontzek, O. Zaharko, V. Pomjakushin, H. C. Walker, D.T. Adroja, H. Luetkens, C. Baines, A. Amato, G. Balakrishnan, T. Fennell, and M. Kenzelmann.
Nature Communications 8, 892 (2017).

3. "Disorder and Quatum spin ice”
N. Martin, P. Bonville, E. Lhotel, S. Guitteny, A. Wildes, C. Decorse, M. Ciomaga Hatnean, G. Balakrishnan, I. Mirebeau, S. Petit.
Physical Review X (to appear).

4. "Evolution of spin correlations in SrDy2O4 in an applied magnetic field"
O.A. Petrenko, O. Young, D. Brunt, G. Balakrishnan, P. Manuel, D. Khalyavin and C. Ritter.
Phy. Rev. B 95 104442 (2017)

5. "Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6"

P. K. Biswas, M. Legner, G. Balakrishnan, M. C. Hatnean, M. R. Lees, D. M. Paul, E. Pomjakushina, T. Prokscha, A. Suter, T. Neupert, and Z. Salman
Phys. Rev. B 95, 020410(R) (2017)

6. Single crystal growth, structure and magnetic properties of Pr2Hf2O7 pyrochlore

M. Ciomaga Hatnean, R. Sibille, M R Lees, M Kenzelmann, V Ban, V Pomjakushin and G Balakrishnan
J. Phys-Cond. Matter 29 075902 (2017)

7. "Antiferroquadrupolar correlations in the quantum spin ice candidate Pr2Zr2O7"
S. Petit, E. Lhotel, S. Guitteny, O. Florea, J. Robert, P. Bonville, I. Mirebeau, J. Ollivier, H. Mutka, E. Ressouche, C. Decorse, M. C. Hatnean, and G. Balakrishnan
Phys. Rev. B 94, 165153 (2016)

8. "Observation of magnetic fragmentation in spin ice"
S.Petit, E Lhotel, B Canals, M.Ciomaga Hatnean, J. Ollivier, H. Mutka, E. Ressouche, A.R. Wildes, M.R. Lees, G. Balakrishnan.
Nature Physics 12 746-750 (2016)

9. "Candidate quantum spin ice in the pyrochlore Pr2Hf2O7"
R. Sibille, E. Lhotel, M. Ciomaga Hatnean, G. Balakrishnan, B. Fak, N. Gauthier, T. Fennell, M. Kenzelmann
Phys. Rev. B 94 024436 (2016)

10. "Zirconate pyrochlore frustrated magnets: Crystal growth by the floating zone technique"
M. Ciomaga Hatnean, C. Decorse, M.R. Lees, O.A. Petrenko, G. Balakrishnan
Crystal 6 79 (2016)

11. "Bulk crystal growth and surface preparation of NiSb, MnSb and NiMnSb"
I. Maskery, C. Burrows, M. Walker, R.P. Singh, G. Balakrishnan, J.A. Duffy, G.R. Bell
J Vacuum Sci. Tech. 34 041219 (2016)

12. "Critical behaviour study of Pr1-xSrxMnO3 and Nd1-xSrx MnO3 with x=1/2"
Oleaga A, Salazar A, Hatnean M Ciomaga, Balakrishnan G
J Alloys and Compounds 682 825-831 (2016)

13. "Experimental signature of the attractive coulomb force between positive and negative magnetic monopoles in spin ice"
Paulsen C, Giblin S R, Lhotel E, Prabhakaran D, Balakrishnan G Matsuhira K and Bramwell S T
Nature Physics 12 661 (2016)

14. "Spin valley locking in the normal state of a transition-metal dichalcogenide superconductor"
Bawden L, Cooil S P, Mazzola F, Riley J M, Collins-McIntyre L J, Sunko V, Hunvik K W B, Leandersson M, Polley C M, Balasubramanian T, Kim T K, Hoesch M, Wells J W, Balakrishnan G, Bahramy M S, King P D C.
Nature Communications 7 11711 (2016)

15. "Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator"
Polley C M, Jovic V, Su T Y, Saghir M, Newby D Jr, Kowalski B J, Jakiela R, Barcz A, Guziewicz M, Balasubramanian T, Balakrishnan G, Laverock J, Smith K E
Phys Rev B 93 075132 (2016)

16. "SnTe microcrystals: Surface cleaning of a topological crystalline insulator"
Saghir M, Walker M, McConville C F, Balakrishnan G
Appl. Phys Letters 108 061602 (2016)

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

Write to:

Department of Physics, University of Warwick, Coventry, CV4 7AL

Contact Details:

Office: P236
Telephone:
+44 (0)2476573879
Fax:
+44 (0)2476150897 
E-Mail:
G.Balakrishnan@warwick.ac.uk

Links:

Superconductivity & Magnetism Group