Two superconducting domes separated by a possible Lifshitz transition in LaFeAs1− x P x O

Two distinct superconducting (SC) domes were discovered in the phase diagram of P-doped iron pnictide superconductors LaFeAs1− x P x O with x ranging from 0 to 1. The first SC dome is centered around x = 0.3 and then disappears as P content increases to x = 0.5. For x > 0.5, a second SC dome appe...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2016-02, Vol.119 (8)
Main Authors: Shen, Chenyi, Si, Bingqi, Cao, Chao, Yang, Xiaojun, Bao, Jinke, Tao, Qian, Li, Yuke, Cao, Guanghan, Xu, Zhu-An
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two distinct superconducting (SC) domes were discovered in the phase diagram of P-doped iron pnictide superconductors LaFeAs1− x P x O with x ranging from 0 to 1. The first SC dome is centered around x = 0.3 and then disappears as P content increases to x = 0.5. For x > 0.5, a second SC dome appears, and Tc reaches another maximum at x = 0.7. Although the maximum of Tc in the two domes is close to each other, the estimated upper critical field (Hc 2) is much larger in the first SC dome, implying a difference in the nature between the two SC domes. Further band calculations and thermopower measurements suggest that there could be a Lifshitz transition in the electronic structure between the two SC domes.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4942532