scholarly journals Bulk topological proximity effect in multilayer systems

2020 ◽  
Vol 102 (7) ◽  
Author(s):  
Jaromir Panas ◽  
Bernhard Irsigler ◽  
Jun-Hui Zheng ◽  
Walter Hofstetter
Keyword(s):  
Proximity Effect ◽  
Multilayer Systems ◽  
Topological Proximity

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 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.

scholarly journals Bulk Topological Proximity Effect

2016 ◽  
Vol 116 (8) ◽  
Author(s):  
Timothy H. Hsieh ◽  
Hiroaki Ishizuka ◽  
Leon Balents ◽  
Taylor L. Hughes
Keyword(s):  
Proximity Effect ◽  
Topological Proximity

Electron Microscopy Studies of The Chemistry And Microstructure of BaF2 / YBa2Cu3O7-x Thin Films

1994 ◽  
Vol 52 ◽  
pp. 796-797
Author(s):  
J. L. Lee ◽  
C. A. Weiss ◽  
R. A. Buhrman ◽  
J. Silcox
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Transmission Electron Microscope ◽  
Atomic Scale ◽  
Island Growth ◽  
Multilayer Systems ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Mgo Substrate

BaF2 thin films are being investigated as candidates for use in YBa2Cu3O7-x (YBCO) / BaF2 thin film multilayer systems, given the favorable dielectric properties of BaF2. In this study, the microstructural and chemical compatibility of BaF2 thin films with YBCO thin films is examined using transmission electron microscopy and microanalysis. The specimen was prepared by using laser ablation to first deposit an approximately 2500 Å thick (0 0 1) YBCO thin film onto a (0 0 1) MgO substrate. An approximately 7500 Å thick (0 0 1) BaF2 thin film was subsequendy thermally evaporated onto the YBCO film.Images from a VG HB501A UHV scanning transmission electron microscope (STEM) operating at 100 kV show that the thickness of the BaF2 film is rather uniform, with the BaF2/YBCO interface being quite flat. Relatively few intrinsic defects, such as hillocks and depressions, were evident in the BaF2 film. Moreover, the hillocks and depressions appear to be faceted along {111} planes, suggesting that the surface is smooth and well-ordered on an atomic scale and that an island growth mechanism is involved in the evolution of the BaF2 film.

Reversing the Proximity Effect in Civil Trials

2013 ◽  
Author(s):  
Kimberly Schweitzer ◽  
Scott Freng ◽  
Sean McCrea
Keyword(s):  
Proximity Effect ◽  
Civil Trials

Pretransition in dipalmitoyl lecithin multilayer systems

1978 ◽  
Vol 3 ◽  
pp. 289-289 ◽  
Author(s):  
L. Trahms ◽  
E. Boroske
Keyword(s):  
Multilayer Systems ◽  
Dipalmitoyl Lecithin
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