Publications (10)
Signature of spin-resolved quantum point contact in p-type trilayer WSe van der Waals heterostructure
K. Sakanashi, P. Krüger, K. Watanabe +5
In this study, the electrostatically induced quantum confinement structure, quantum point contact, has been realized in p-type trilayer tungsten diselenide-based van der Waals hete…
Non-Ergodicity & Microscopic Symmetry Breaking of the Conductance Fluctuations in Disordered Mesoscopic Graphene
G. Bohra, R. Somphonsane, N. Aoki +4
We show a dramatic deviation from ergodicity for the conductance fluctuations in graphene. In marked contrast to the ergodicity of dirty metals, fluctuations generated by varying m…
Coupling Remote States through the Continuum: Multi-State Fano Resonances
Y. Yoon, M. -G. Kang, T. Morimoto +6
We demonstrate a fully-tunable multi-state Fano system in which remotely-implemented quantum states interfere with each other through their coupling to a mutual continuum. On tunin…
Detecting weak coupling in mesoscopic systems with a nonequilibrium Fano resonance
S. Xiao, Y. Yoon, Y. -H. Lee +5
A critical aspect of quantum mechanics is the nonlocal nature of the wavefunction, a characteristic that may yield unexpected coupling of nominally-isolated systems. The capacity t…
Probing onset of strong localization and electron-electron interactions with the presence of direct insulator-quantum Hall transition
Shun-Tsung Lo, Kuang Yao Chen, T. L. Lin +11
We have performed low-temperature transport measurements on a disordered two-dimensional electron system (2DES). Features of the strong localization leading to the quantum Hall eff…
Detector Backaction on the Self-Consistent Bound State in Quantum Point Contacts
Y. Yoon, M. -G. Kang, T. Morimoto +5
Bound-state (BS) formation in quantum point contacts (QPCs) may offer a convenient way to localize and probe single spins. In this letter, we investigate how such BSs are affected…
Tuning the Fano Resonance with an Intruder Continuum
J. Fransson, M. -G. Kang, Y. Yoon +5
Through a combination of experiment and theory we establish the possibility of achieving strong tuning of Fano resonances (FRs), by allowing their usual two-path geometry to interf…
Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system
Kuang Yao Chen, Y. H. Chang, C. -T. Liang +9
Magneto-transport measurements are performed on the two-dimensional electron system (2DES) in an AlGaAs/GaAs heterostructure. By increasing the magnetic field perpendicular to the…
Probing the microscopic structure of bound states in quantum point contacts
Y. Yoon, L. Mourokh, T. Morimoto +4
Using an approach that allows us to probe the electronic structure of strongly pinched-off quantum point contacts (QPCs), we provide evidence for the formation of self-consistently…
Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene
N. Arabchigavkani, R. Somphonsane, H. Ramamoorthy +15
Mesoscopic conductance fluctuations are a ubiquitous signature of phase-coherent transport in small conductors, exhibiting universal character independent of system details. In thi…