DrMalcolm Connolly

Topological insulator transmons (Timons)
Integration of topological insulator Josephson junctions in superconducting qubit circuits, T. W. Schmitt, M. R. Connolly, M. Schleenvoigt, C. Liu, O. Kennedy, A. R. Jalil, B. Bennemann, S. Trellenkamp, F. Lentz, E. Neumann, T. Lindström, S. E. de Graaf, E. Berenschot, N. Tas, G. Mussler, K. D. Petersson, D. Grützmacher, and Peter Schüffelgen (submitted) (2020)

Team FZJ making outstanding achievements with the selective area growth of topological insulator nanoribbons. Nanostencil lithography enables fabrication of Josephson junctions with high quality interfaces.

Magnetic topological insulators
Declan Burke, Dennis Heffels, Kristof Moors, Peter Schüffelgen, Detlev Grützmacher, and Malcolm R. Connolly, Robust Majorana bound states in magnetic topological insulator nanoribbons with fragile chiral edge channels, Phys. Rev. B 109, 045138 (2024)
S.W. Wang, D. Xiao, Z. Dou, M. Cao, Y. F. Zhao, N. Samarth, C. Z. Chang, M. R. Connolly, and C. G. Smith, Demonstration of Dissipative Quasihelical Edge Transport in Quantum Anomalous Hall Insulators , Phys. Rev. Lett. (2020) (accepted)

Superconducting gatemon qubits
L. Casparis*, M. R. Connolly*, M. Kjaergaard, N. J. Pearson, A. Kringhoj, T. W. Larsen, F. Kuemmeth, T. Wang, C. Thomas, S. Gronin, G. C. Gardner, M. Manfra, C. M. Marcus, and K. D. Petersson, Superconducting Gatemon Qubit based on a Proximitized Two Dimensional Electron Gas, Nature Nanotechnology 13, 915–919 (2018) (*equal contribution)

Imaging edge states
Z. Dou, S. Morikawa, A. Cresti, S. W. Wang, C. G. Smith, C. Melios, O. Kazakova, K. Watanabe, T. Taniguchi, S. Masubuchi, T. Machida, M. R. Connolly, Imaging bulk and edge transport near the Dirac point in graphene moiré superlattices, Nano Letters 18, 2530 (2018).

Device microscopy
M. R. Connolly, R. K. Puddy, D. Logoteta, P. Marconcini, M. Roy, J. Griffiths, G. A. C. Jones, P. Maksym, M. Macucci, C. G. Smith, Unraveling quantum Hall breakdown in bilayer graphene with scanning gate microscopy, Nano Letters 12 (11), 5448 (2012).

C. Chua, M. R. Connolly, A. Lartsev, T. Yager, S. Lara-Avila, S. Kubatkin, S. Kopylov, V. Fal’ko, R. Yakimova, R. Pearce, T. J. B. M. Janssen, A. Tzalenchuk, and C. G. Smith, Quantum Hall Effect and Quantum Point Contact in Bilayer-Patched Epitaxial Graphene, Nano Lett., 14, 6, 3369–3373 (2014)

Single-electron pumping in graphene
M. R. Connolly, K. L. Chiu, S. P. Giblin, M. Kataoka, J. D. Fletcher, C. Chua, J. P. Griffths, G. A. C. Jones, V. I. Fal'ko, C. G. Smith, T. J. B. M. Janssen, Gigahertz quantized charge pumping in graphene quantum dots, Nature Nanotechnology 8, 417–420 (2013).