Cited 0 time in webofscience Cited 0 time in scopus

Quatnum dots formed in three-dimensional Dirac-semimetal Cd3As2 nanowires

Title
Quatnum dots formed in three-dimensional Dirac-semimetal Cd3As2 nanowires
Authors
Jung, MinkyungYoshida, KenjiJalil, MansoorNagaosa, NaotoSeo, JungpilHirakawa, Kazuhiko
DGIST Authors
Jung, MinkyungSeo, Jungpil
Issue Date
2018-03-05
Citation
APS March Meeting 2018
Type
Conference
Abstract
Three-dimensional (3D) Dirac semimetals have attracted considerable attention owing to their exotic properties, both predicted in theory and recently demonstrated experimentally. Here, we demonstrate single quantum dots confined with two p-n junctions in 3D Dirac semimetal Cd3As2 nanowires under high magnetic fields. The device can be operated in two different regimes: (i) an n-type channel between n*-type leads underneath the source-drain contacts, creating an open regime (n*-n-n* configuration); (ii) a p-type channel in the middle of the nanowire, forming a p-type quantum dot (QD) (n*-p-n* configuration). At zero magnetic field, the quantum confinement effect vanishes in the n*-p-n* QD because the Dirac fermions penetrate p-n junctions with high transmission probability (Klein tunneling). However, the high magnetic fields bend the Dirac fermion trajectories at the p-n junction due to cyclotron motion, preventing the Klein tunneling. This results in a strong confinement at p-n junctions of Dirac materials. In this regime, the device shows clean Coulomb diamonds, indicating that a single QD is formed in a Dirac semimetal nanowire.
URI
http://hdl.handle.net/20.500.11750/15087
Publisher
미국물리학회
Related Researcher
  • Author Jung, Minkyung Quantum Nanoelectronic Devices Lab
  • Research Interests nanoelectronics, quantum transport, quantum physics, qubit, condensed matter physics,
Files:
There are no files associated with this item.
Collection:
Division of NanotechnologyQuantum Nanoelectronic Devices Lab1. Journal Articles
Division of Nanotechnology2. Conference Papers
Department of Physics and ChemistryNanospm Lab(Advanced Materials Research Group)2. Conference Papers


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE