About Parvathy HarikumarParvathy is a free particle, as she describes herself, from the God’s own country, Kerala, India. It was her dream to study or work outside India, and it has finally come true with her first postdoctoral position at Trinity!
Parvathy did all of her studies after school in the land of dosas and chutneys: Tamil Nadu, India; no wonder why she craves the cuisine every now and then. After obtaining her masters in physics from the University of Madras in Chennai, India, she joined the Indira Gandhi Centre for Atomic Research (IGCAR) to pursue her doctoral degree. In September 2023, she was awarded a PhD in Physics for her work in computational spintronics. Parvathy’s research interests include studying spin-dependent transport in magnetic tunnel junctions with impurities for spintronic applications.
She is an avid traveler who has tried her luck at skydiving, scuba diving, paragliding and everything that makes her feel more alive. She is a passionate singer, energetic dancer and an enthusiastic badminton player who has won a championship tournament at the researchers’ residence enclave back in her PhD days.
Parvathy's ResearchI am a computational materials physicist with a focus on studying how transition metal impurities in the insulating barrier of a magnetic tunnel junction affect its functionalities for spin transport. This also includes further analysis of how these effects can be used to improve the efficiency of spintronic devices like MRAMs, magnetic memories, and the like.
In my research, I have developed FORTRAN codes for spin transport that implement Non-equilibrium Green’s function techniques alongside my PhD supervisor Dr. Mathi Jaya from IGCAR, India. These codes are also combined with ab initio results through the Slater Koster semi-empirical tight-binding method to realize transport in real magnetic heterostructures.
My publications can be found on my Research Gate profile.
About Daniel LambertDaniel is an Aussie that made the somewhat strange decision to leave his Sydney homeland and move to Dublin in the middle of a pandemic.
At the University of New South Wales, he earned an undergraduate degree in physics and engineering and went on to complete his Ph.D. at the School of Photovoltaic and Renewable Energy, known for its revolutionary contributions to silicon solar cell development. His expertise in computational atomic chemistry came about as part of a project investigating defect chemistry of transition metal oxide solar cell contacts.
Daniel has frequently been involved in the climate justice movement, through the Australian Youth Climate Coalition and local university divestment efforts, helping organize many protests and actions in pursuit of a clean and just future for humanity.
In his free time, Daniel has worked as an amateur circus performer with skills in fire-twirling and contact ball juggling. His many hobbies and interests include boardgames, bushwalks, salsa dancing, bouldering, slacklining, and badly singing karaoke to Taylor Swift songs.
Daniel's ResearchDaniels Ph.D. research investigated defects arising from carrier selective photovoltaic cell contacts. Rigorous Density Functional Theory defect formation energy calculations for intrinsic and extrinsic defects in MoO3 were used to produce Brouwer diagrams predicting the concentration of defects and contaminants at various temperature and pressure conditions. This was followed by an investigation into defect cluster formation in silicon and a prediction of defect clusters and their electronic effects.
Daniel’s current research is motivated by the high computational cost of the hybrid functional DFT techniques that are currently required for accurately modeling material properties such as bandgaps. His team is investigating novel methods for calculating and implementing Hubbard U and Hund’s J corrections in transition metal oxides that could allow for highly accurate properties without the need for these costly hybrid functionals.
Daniel 's Publications
- D. S. Lambert and D. D. O’Regan, “DFT+U+J with linear response parameters predicts non-magnetic oxide band gaps with hybrid-functional accuracy”, arXiv:2111.08487, 2021. arXiv
- D. S. Lambert, S. T. Murphy, A. Lennon, P. A. Burr, RSC Advances, 7(85), 53810-53821 (2017)
- D. S. Lambert, A. Lennon, P. A. Burr, The Journal of Physical Chemistry C 122(48): 27241-27249 (2018)
- D. S. Lambert, A. Lennon, P. A. Burr Physical Review materials, 4, 025403.