Linnaeus Physics Colloquium: Spin on 2D electronics
Welcome to Linnaeus Physics Colloquium, a series of seminars delivered by renowned researchers in physics.
Title: Spin on 2D electronics
Lecturer: Saroj Prasad Dash, associate professor, Chalmers
Place: Kalmar: room Ma371, building Magna. Live: https://lnu-se.zoom.us/j/416290322.
Coffee and buns will be served.
Abstract
Exploiting the spin degrees of freedom of electrons in nanoelectronic devices is considered as one of the alternative state variables for information storage and processing beyond the charge-based technology. We have shown that the mainstream semiconductors and novel 2D materials have great potential for the creation, transport, detection, and manipulation of spin polarization at room temperature.
Particularly, I will present the basic building blocks for realization of spin circuits, such as spin injection into silicon [1], long-distance spin communication in graphene circuits [2,3], large tunnel spin polarization using h-BN barriers [4], and electrical gate control of spin polarization in graphene/MoS2 heterostructure [5].
Furthermore, using topological materials we electrically detected a novel spin current due to spin-momentum locking [6], spin Hall [7], and Edelstein [8] effects which can be useful for future spin-orbit torque-based memory and logic devices.
Finally, combining graphene with topological insulators and magnetic insulators we reported the emergence of strong proximity induced spin texture [10], gate tunable Rashba-Edelstein effect [10], and magnetic exchange interaction [11].
These findings demonstrate all-electrical spintronic devices at room temperature in 2D materials heterostructure, which can be key building blocks in future device architectures.
References
[1] SP Dash, S Sharma, RS Patel, et al., Nature 462, 491 (2009).
[2] MV Kamalakar, et al. SP Dash, Nature Communications, 6, 6766 (2015).
[3] D Khokhriakov et a. SP Dash, arXiv:1905.04151 (2019).
[4] MV Kamalakar, et al. SP Dash, Scientific Reports, 6, 21168 (2016).
[5] A Dankert, SP Dash; Nature Communications 8, 16093 (2017).
[6] A Dankert, et al., SP Dash; Nano Letters 15, 7976 (2015).
[7] B Zhao, et al. SP Dash, arXiv:1812.02113 (2018).
[8] B Zhao, et al. SP Dash, arXiv:1910.06225 (2019).
[9] D Khokhriakov, et al. SP Dash, Science Advances, 4:eaat9349 (2018).
[10] D Khokhriakov, et al. SP Dash, arXiv:1910.06760 (2019).
[11] B Karpiak et al. SP Dash, 2D Materials, https://doi.org/10.1088/2053-1583/ab5915 (2019).