Projects per year
Abstract
We study the temperature dependence (77-475 K) of the longitudinal resistivity and Hall coefficient of thin films (thickness 20 nm) of three-dimensional topological Dirac semimetal Na3Bi grown via molecular beam epitaxy. The temperature-dependent Hall coefficient is electronlike at low temperature, but transitions to holelike transport around 200 K. We develop a model of a Dirac band with electron-hole asymmetry in Fermi velocity and mobility (assumed proportional to the square of Fermi velocity) which explains well the magnitude and temperature dependence of the Hall resistivity. We find that the hole mobility is about seven times larger than the electron mobility. In addition, we find that the electron mobility decreases significantly with increasing temperature, suggesting electron-phonon scattering strongly limits the room-temperature mobility.
| Original language | English |
|---|---|
| Article number | 235412 |
| Journal | Physical Review B |
| Volume | 96 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 11 Dec 2017 |
Projects
- 3 Finished
-
ARC Centre of Excellence in Future Low-energy Electronics Technologies
Fuhrer, M. (Primary Chief Investigator (PCI)), Bao, Q. (Chief Investigator (CI)), Culcer, D. (Chief Investigator (CI)), Davis, M. (Chief Investigator (CI)), Davis, J. A. (Chief Investigator (CI)), Hamilton, A. (Chief Investigator (CI)), Helmerson, K. (Chief Investigator (CI)), Klochan, O. (Chief Investigator (CI)), Medhekar, N. (Chief Investigator (CI)), Ostrovskaya, E. (Chief Investigator (CI)), Parish, M. (Chief Investigator (CI)), Schiffrin, A. (Chief Investigator (CI)), Seidel, J. (Chief Investigator (CI)), Sushkov, O. (Chief Investigator (CI)), Valanoor, N. (Chief Investigator (CI)), Wang, X. (Chief Investigator (CI)), Galitskiy, V. (Partner Investigator (PI)), Gurarie, V. (Partner Investigator (PI)), Hannon, J. (Partner Investigator (PI)), Höfling, S. (Partner Investigator (PI)), Hone, J. (Partner Investigator (PI)), Rule, K. (Partner Investigator (PI)), Krausz, F. (Partner Investigator (PI)), Littlewood, P. (Partner Investigator (PI)), MacDonald, A. (Partner Investigator (PI)), Neto, A. (Partner Investigator (PI)), Oezyilmaz, B. (Partner Investigator (PI)), Paglione, J. (Partner Investigator (PI)), Phillips, W. (Partner Investigator (PI)), Spielman, I. (Partner Investigator (PI)), Tadich, A. (Partner Investigator (PI)), Xue, Q. (Partner Investigator (PI)), Cole, J. (Chief Investigator (CI)), Perali, A. (Partner Investigator (PI)), Neilson, D. (Partner Investigator (PI)), Sek, G. (Partner Investigator (PI)), Gaston, N. (Partner Investigator (PI)), Hodgkiss, J. M. (Partner Investigator (PI)), Tang, M. (Partner Investigator (PI)), Karel, J. (Chief Investigator (CI)), Nguyen, T.-L. (Project Manager), Adam, S. (Partner Investigator (PI)), Granville, S. (Partner Investigator (PI)), Kumar, P. V. (Chief Investigator (CI)) & Daeneke, T. (Chief Investigator (CI))
ARC - Australian Research Council, Monash University – Internal School Contribution, Monash University – Internal Department Contribution, Monash University – Internal Faculty Contribution, Monash University – Internal University Contribution, University of Wollongong, University of Queensland , Tsinghua University, University of New South Wales (UNSW), Australian National University (ANU), RMIT University, Swinburne University of Technology
29/06/17 → 28/06/24
Project: Research
-
Realisation of novel electronic phases in two-dimensional materials
Edmonds, M. (Primary Chief Investigator (PCI))
ARC - Australian Research Council
17/06/16 → 31/12/19
Project: Research
-
Understanding and Controlling the Properties of Dirac Electronic Materials
Fuhrer, M. (Primary Chief Investigator (PCI))
ARC - Australian Research Council
14/01/13 → 30/09/18
Project: Research
Equipment
-
Melbourne Centre for Nanofabrication (MCN)
Langelier, S. (Manager)
Office of the Vice-Provost (Research and Research Infrastructure)Facility/equipment: Facility
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