scholarly journals Topological proximity effect in a topological insulator hybrid

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
T. Shoman ◽  
A. Takayama ◽  
T. Sato ◽  
S. Souma ◽  
T. Takahashi ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Proximity Effect ◽  
Topological Proximity

scholarly journals Termination switching of antiferromagnetic proximity effect in topological insulator

2020 ◽  
Vol 6 (33) ◽  
pp. eaaz8463
Author(s):  
Chao-Yao Yang ◽  
Lei Pan ◽  
Alexander J. Grutter ◽  
Haiying Wang ◽  
Xiaoyu Che ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Topological Insulator ◽  
Surface State ◽  
Proximity Effect ◽  
Surface States ◽  
Double Exchange ◽  
Exchange Interactions ◽  
Stacking Order ◽  
Bst Films ◽  
Magnetic Proximity Effect

This work reports the ferromagnetism of topological insulator, (Bi,Sb)2Te3 (BST), with a Curie temperature of approximately 120 K induced by magnetic proximity effect (MPE) of an antiferromagnetic CrSe. The MPE was shown to be highly dependent on the stacking order of the heterostructure, as well as the interface symmetry: Growing CrSe on top of BST results in induced ferromagnetism, while growing BST on CrSe yielded no evidence of an MPE. Cr-termination in the former case leads to double-exchange interactions between Cr3+ surface states and Cr2+ bulk states. This Cr3+-Cr2+ exchange stabilizes the ferromagnetic order localized at the interface and magnetically polarizes the BST Sb band. In contrast, Se-termination at the CrSe/BST interface yields no detectable MPE. These results directly confirm the MPE in BST films and provide critical insights into the sensitivity of the surface state.

Magnetic proximity effect in the topological insulator BiSbTeSe2

2015 ◽  
Vol 9 (3) ◽  
pp. 175-179 ◽  
Author(s):  
Karan Banerjee ◽  
Jean Besbas ◽  
Peng Ren ◽  
Lan Wang ◽  
Hyunsoo Yang
Keyword(s):  
Topological Insulator ◽  
Proximity Effect ◽  
Magnetic Proximity Effect

scholarly journals Proximity-effect-induced superconducting phase in the topological insulator Bi2Se3

2012 ◽  
Vol 86 (13) ◽  
Author(s):  
Fan Yang ◽  
Fanming Qu ◽  
Jie Shen ◽  
Yue Ding ◽  
Jun Chen ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Proximity Effect ◽  
Superconducting Phase

scholarly journals Conversion of a conventional superconductor into a topological superconductor by topological proximity effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
C. X. Trang ◽  
N. Shimamura ◽  
K. Nakayama ◽  
S. Souma ◽  
K. Sugawara ◽  
...  
Keyword(s):  
Proximity Effect ◽  
Energy Gap ◽  
Majorana Fermions ◽  
Cooper Pairs ◽  
Superconducting Transition ◽  
Topological Superconductors ◽  
Alternative Approach ◽  
Properties Of Materials ◽  
Topological Proximity ◽  
Conventional Superconductor

AbstractRealization of topological superconductors (TSCs) hosting Majorana fermions is a central challenge in condensed-matter physics. One approach is to use the superconducting proximity effect (SPE) in heterostructures, where a topological insulator contacted with a superconductor hosts an effective p-wave pairing by the penetration of Cooper pairs across the interface. However, this approach suffers a difficulty in accessing the topological interface buried deep beneath the surface. Here, we propose an alternative approach to realize topological superconductivity without SPE. In a Pb(111) thin film grown on TlBiSe2, we discover that the Dirac-cone state of substrate TlBiSe2 migrates to the top surface of Pb film and obtains an energy gap below the superconducting transition temperature of Pb. This suggests that a Bardeen-Cooper-Schrieffer superconductor is converted into a TSC by the topological proximity effect. Our discovery opens a route to manipulate topological superconducting properties of materials.

Erratum: Magnetic Proximity Effect in an Antiferromagnetic Insulator/Topological Insulator Heterostructure with Sharp Interface [Chin. Phys. Lett. 38 (2021) 057303]

2021 ◽  
Vol 38 (10) ◽  
pp. 109901
Author(s):  
Yuxin Liu ◽  
Xuefan Niu ◽  
Rencong Zhang ◽  
Qinghua Zhang ◽  
Jing Teng ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Proximity Effect ◽  
Sharp Interface ◽  
Chinese Academy Of Sciences ◽  
Academy Of Sciences ◽  
Magnetic Proximity Effect

We should add the following acknowledge: Jing Teng thanks the support from the Youth Innovation Promotion Association Project, Chinese Academy of Sciences.

Sign in / Sign up

Export Citation Format

Share Document