7 papers · 1 filter
Distinct Properties of Vortex Bound States Driven by Temperature
Xinwei Fan, Xiaoyu Chen, Huan Yang +1
We investigate the behavior of vortex bound states in the quantum limit by self-consistently solving the Bogoliubov-de Gennes equation. We find that the energies of the vortex boun…
Friedel Oscillations of Vortex Bound States Under Extreme Quantum Limit in KCa2Fe4As4F2
Xiaoyu Chen, Wen Duan, Xinwei Fan +6
We report the observation of discrete vortex bound states with the energy levels deviating from the widely believed ratio of 1:3:5 in the vortices of an iron based superconductor K…
Single particle tunneling spectroscopy and superconducting gaps in layered iron based superconductor KCaFeAsF
Wen Duan, Kailun Chen, Wenshan Hong +5
We perform scanning tunneling microscopy/spectroscopy study on the layered iron based superconductor KCaFeAsF with a critical temperature of about 33.5 K. Two types…
Observation and characterization of the zero energy conductance peak in the vortex core state of FeTeSe
Xiaoyu Chen, Mingyang Chen, Wen Duan +3
The search for the Majorana fermions in condensed matter physics has attracted much attention, partially because they may be used for the fault-tolerant quantum computation. It has…
Multiband superconductivity and possible nodal gap in RbCrAs revealed by Andreev reflection and single-particle tunneling measurements
Zhixin Liu, Mingyang Chen, Ying Xiang +7
By measuring point-contact Andreev reflection (PCAR) spectra in the newly discovered chromium-based quasi-one-dimensional superconductor RbCrAs, we find clear evidence…
Direct visualization of sign reversal s^+- superconducting gaps in FeTe0.55Se0.45
Mingyang Chen, Qingkun Tang, Xiaoyu Chen +7
In many unconventional superconductors, the pairing of electrons is driven by the repulsive interaction, which leads to the sign reversal of superconducting gaps along the Fermi su…