Asset Details
Do you wish to reserve the book?
Resurgence of superconductivity and the role of dxy hole band in FeSe1−xTex
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Resurgence of superconductivity and the role of dxy hole band in FeSe1−xTex
Do you wish to request the book?
Resurgence of superconductivity and the role of dxy hole band in FeSe1−xTex
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Resurgence of superconductivity and the role of dxy hole band in FeSe1−xTex
2023
Overview
Iron-chalcogenide superconductors display rich phenomena caused by orbital-dependent band shifts and electronic correlations. Additionally, they are potential candidates for topological superconductivity due to the band inversion between the Fe
d
bands and the chalcogen
p
z
band. Here we present a detailed study of the electronic structure of the nematic superconductors FeSe
1−
x
Te
x
(0 <
x
< 0.4) using angle-resolved photoemission spectroscopy to understand the role of orbital-dependent band shifts, electronic correlations and the chalcogen band. We assess the changes in the effective masses using a three-band low energy model, and the band renormalization via comparison with DFT band structure calculations. The effective masses decrease for all three-hole bands inside the nematic phase, followed by a strong increase for the band with
d
x
y
orbital character. Interestingly, this nearly-flat
d
x
y
band becomes more correlated as it shifts towards the Fermi level with increasing Te concentrations and as the second superconducting dome emerges. Our findings suggests that the
d
x
y
hole band, which is very sensitive to the chalcogen height, could be involved in promoting an additional pairing channel and increasing the density of states to stabilize the second superconducting dome in FeSe
1−
x
Te
x
. This simultaneous shift of the
d
x
y
hole band and enhanced superconductivity is in contrast with FeSe
1−
x
S
x
.
The iron chalcogenide material FeSe1-xTex constitutes an important family of unconventional superconductors but its nematic phase was less explored due to a lack of single crystals. In this study, the authors provide a systematic study of the electronic structure for nematic FeSe1-xTex and observe that as the Te content increases a gradual shift and renormalization of the dxy orbital occurs, concomitant with the enhancement of superconductivity.
Publisher
Nature Publishing Group UK,Nature Publishing Group
