scholarly journals Impurity-induced subgap bound states in alkali-doped iron chalcogenide superconductors

2013 ◽  
Vol 88 (13) ◽  
Author(s):  
Shantanu Mukherjee ◽  
Maria N. Gastiasoro ◽  
Brian M. Andersen
Keyword(s):  
Bound States ◽  
Iron Chalcogenide ◽  
Iron Chalcogenide Superconductors

scholarly journals A new Majorana platform in an Fe-As bilayer superconductor

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wenyao Liu ◽  
Lu Cao ◽  
Shiyu Zhu ◽  
Lingyuan Kong ◽  
Guangwei Wang ◽  
...  
Keyword(s):  
Bound States ◽  
Zero Mode ◽  
Surface States ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Iron Pnictide ◽  
Iron Chalcogenide ◽  
Zero Modes ◽  
Topological Quantum ◽  
Iron Chalcogenide Superconductors

Abstract Iron-chalcogenide superconductors have emerged as a promising Majorana platform for topological quantum computation. By combining topological band and superconductivity in a single material, they provide significant advantage to realize isolated Majorana zero modes. However, iron-chalcogenide superconductors, especially Fe(Te,Se), suffer from strong inhomogeneity which may hamper their practical application. In addition, some iron-pnictide superconductors have been demonstrated to have topological surface states, yet no Majorana zero mode has been observed inside their vortices, raising a question of universality about this new Majorana platform. In this work, through angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy measurement, we identify Dirac surface states and Majorana zero modes, respectively, for the first time in an iron-pnictide superconductor, CaKFe4As4. More strikingly, the multiple vortex bound states with integer-quantization sequences can be accurately reproduced by our model calculation, firmly establishing Majorana nature of the zero mode.

scholarly journals On the Remarkable Superconductivity of FeSe and Its Close Cousins

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1402 ◽  
Author(s):  
Andreas Kreisel ◽  
Peter J. Hirschfeld ◽  
Brian M. Andersen
Keyword(s):  
Bound States ◽  
Condensed Matter ◽  
Experimental Studies ◽  
Surface States ◽  
Critical Temperatures ◽  
Iron Based Superconductors ◽  
Iron Chalcogenide ◽  
Wide Range ◽  
Ordered Phases ◽  
Iron Chalcogenide Superconductors

Emergent electronic phenomena in iron-based superconductors have been at the forefront of condensed matter physics for more than a decade. Much has been learned about the origins and intertwined roles of ordered phases, including nematicity, magnetism, and superconductivity, in this fascinating class of materials. In recent years, focus has been centered on the peculiar and highly unusual properties of FeSe and its close cousins. This family of materials has attracted considerable attention due to the discovery of unexpected superconducting gap structures, a wide range of superconducting critical temperatures, and evidence for nontrivial band topology, including associated spin-helical surface states and vortex-induced Majorana bound states. Here, we review superconductivity in iron chalcogenide superconductors, including bulk FeSe, doped bulk FeSe, FeTe1−xSex, intercalated FeSe materials, and monolayer FeSe and FeTe1−xSex on SrTiO3. We focus on the superconducting properties, including a survey of the relevant experimental studies, and a discussion of the different proposed theoretical pairing scenarios. In the last part of the paper, we review the growing recent evidence for nontrivial topological effects in FeSe-related materials, focusing again on interesting implications for superconductivity.

Synthesis, characterization and low temperature studies of iron chalcogenide superconductors

2009 ◽  
Vol 486 (1-2) ◽  
pp. 37-41 ◽  
Author(s):  
J. Janaki ◽  
T. Geetha Kumary ◽  
Awadhesh Mani ◽  
S. Kalavathi ◽  
G.V.R. Reddy ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Chalcogenide ◽  
Iron Chalcogenide Superconductors

scholarly journals Strain effects in monolayer iron-chalcogenide superconductors

2D Materials ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 015001 ◽  
Author(s):  
Cesare Tresca ◽  
Fabio Ricci ◽  
Gianni Profeta
Keyword(s):  
Strain Effects ◽  
Iron Chalcogenide ◽  
Iron Chalcogenide Superconductors

scholarly journals Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations

2011 ◽  
Vol 74 (12) ◽  
pp. 124503 ◽  
Author(s):  
Jinsheng Wen ◽  
Guangyong Xu ◽  
Genda Gu ◽  
J M Tranquada ◽  
R J Birgeneau
Keyword(s):  
Crystal Growth ◽  
Iron Chalcogenide ◽  
Iron Chalcogenide Superconductors

Noise Spectroscopy Investigation of Aging Induced Degradation in Iron-Chalcogenide Superconductors

2016 ◽  
pp. 1-1 ◽  
Author(s):  
Costantino Mauro ◽  
Carlo Barone ◽  
Sergio Pagano ◽  
Yoshinori Imai ◽  
Fuyuki Nabeshima ◽  
...  
Keyword(s):  
Iron Chalcogenide ◽  
Noise Spectroscopy ◽  
Iron Chalcogenide Superconductors

Fabrication and Characterization of Sintered Iron-Chalcogenide Superconductors

2016 ◽  
Vol 26 (3) ◽  
pp. 1-5 ◽  
Author(s):  
C. Fiamozzi Zignani ◽  
V. Corato ◽  
A. Leo ◽  
G. De Marzi ◽  
A. Mancini ◽  
...  
Keyword(s):  
Sintered Iron ◽  
Iron Chalcogenide ◽  
Fabrication And Characterization ◽  
Iron Chalcogenide Superconductors
Sign in / Sign up

Export Citation Format

Share Document