Dislocation Majorana zero modes in perovskite oxide 2DEG

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Title
Dislocation Majorana zero modes in perovskite oxide 2DEG
Author(s)
Suk Bum Chung; Chan C.; Yao H.
Publication Date
2016-05
Journal
SCIENTIFIC REPORTS, v.6, no., pp.25184 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Much of the current experimental efforts for detecting Majorana zero modes have been centered on probing the boundary of quantum wires with strong spin-orbit coupling. The same type of Majorana zero mode can also be realized at crystalline dislocations in 2D superconductors with the nontrivial weak topological indices. Unlike at an Abrikosov vortex, at such a dislocation, there is no other low-lying midgap state than the Majorana zero mode so that it avoids usual complications encountered in experimental detections such as scanning tunneling microscope (STM) measurements. We will show that, using the anisotropic dispersion of the t2g orbitals of Ti or Ta atoms, such a weak topological superconductivity can be realized when the surface two-dimensional electronic gas (2DEG) of SrTiO3 or KTaO3 becomes superconducting, which can occur through either intrinsic pairing or proximity to existing s-wave superconductors. © 2016, Nature Publishing Group. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/2902
ISSN
2045-2322
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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