scholarly journals Theory of quasiparticle vortex bound states in iron-based superconductors: Application to scanning tunneling spectroscopy of LiFeAs

2012 ◽  
Vol 85 (2) ◽  
Author(s):  
Yan Wang ◽  
Peter J. Hirschfeld ◽  
Ilya Vekhter
Keyword(s):  
Bound States ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals Studies of scanning tunneling spectroscopy on iron-based superconductors

2018 ◽  
Vol 67 (20) ◽  
pp. 207401
Author(s):  
Gu Qiang-Qiang ◽  
Wan Si-Yuan ◽  
Yang Huan ◽  
Wen Hai-Hu
Keyword(s):  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals Scalable Majorana vortex modes in iron-based superconductors

2020 ◽  
Vol 6 (9) ◽  
pp. eaay0443 ◽  
Author(s):  
Ching-Kai Chiu ◽  
T. Machida ◽  
Yingyi Huang ◽  
T. Hanaguri ◽  
Fu-Chun Zhang
Keyword(s):  
Tight Binding ◽  
Three Dimensional ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Zero Energy ◽  
Binding Model ◽  
Zero Bias ◽  
Iron Based Superconductors ◽  
Iron Based ◽  
Important Indication

The iron-based superconductor FeTexSe1−x is one of the material candidates hosting Majorana vortex modes residing in the vortex cores. It has been observed by recent scanning tunneling spectroscopy measurement that the fraction of vortex cores having zero-bias peaks decreases with increasing magnetic field on the surface of FeTexSe1−x. The hybridization of two Majorana vortex modes cannot simply explain this phenomenon. We construct a three-dimensional tight-binding model simulating the physics of over a hundred Majorana vortex modes in FeTexSe1−x. Our simulation shows that the Majorana hybridization and disordered vortex distribution can explain the decreasing fraction of the zero-bias peaks observed in the experiment; the statistics of the energy peaks off zero energy in our Majorana simulation are in agreement with the experiment. These agreements lead to an important indication of scalable Majorana vortex modes in FeTexSe1−x. Thus, FeTexSe1−x can be one promising platform having scalable Majorana qubits for quantum computing.

scholarly journals Bound states of defects in superconducting LiFeAs studied by scanning tunneling spectroscopy

2012 ◽  
Vol 86 (17) ◽  
Author(s):  
S. Grothe ◽  
Shun Chi ◽  
P. Dosanjh ◽  
Ruixing Liang ◽  
W. N. Hardy ◽  
...  
Keyword(s):  
Bound States ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling

scholarly journals Evidence for Majorana bound states in an iron-based superconductor

Science ◽  
2018 ◽  
Vol 362 (6412) ◽  
pp. 333-335 ◽  
Author(s):  
Dongfei Wang ◽  
Lingyuan Kong ◽  
Peng Fan ◽  
Hui Chen ◽  
Shiyu Zhu ◽  
...  
Keyword(s):  
Bound States ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Vortex Center ◽  
Zero Energy ◽  
Zero Bias ◽  
Majorana Bound States ◽  
Topological Materials ◽  
Field Temperature ◽  
Iron Based

The search for Majorana bound states (MBSs) has been fueled by the prospect of using their non-Abelian statistics for robust quantum computation. Two-dimensional superconducting topological materials have been predicted to host MBSs as zero-energy modes in vortex cores. By using scanning tunneling spectroscopy on the superconducting Dirac surface state of the iron-based superconductor FeTe0.55Se0.45, we observed a sharp zero-bias peak inside a vortex core that does not split when moving away from the vortex center. The evolution of the peak under varying magnetic field, temperature, and tunneling barrier is consistent with the tunneling to a nearly pure MBS, separated from nontopological bound states. This observation offers a potential platform for realizing and manipulating MBSs at a relatively high temperature.

scholarly journals Quantum interference of impurity bound states in Bi2Sr2Ca(Cu1−xZnx)2O8+δprobed by scanning tunneling spectroscopy

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
Tadashi Machida ◽  
Takuya Kato ◽  
Hiroshi Nakamura ◽  
Masaki Fujimoto ◽  
Takashi Mochiku ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Bound States ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling
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