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29 March 2024 |
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The vital role of hole-carriers for superconductivity in pressurized black phosphorus | Jing Guo
; Honghong Wang
; Fabian von Rohr
; Wei Yi
; Yazhou Zhou
; Zhe Wang
; Shu Cai
; Shan Zhang
; Xiaodong Li
; Yanchuan Li
; Jing Liu
; Ke Yang
; Aiguo Li
; Sheng Jiang
; Qi Wu
; Tao Xiang
; Robert J Cava
; Liling Sun
; | Date: |
10 Nov 2016 | Abstract: | The influence of carrier type on superconductivity has been an important
issue for understanding both conventional and unconventional superconductors
[1-7]. For elements that superconduct, it is known that hole-carriers govern
the superconductivity for transition and main group metals [8-10]. The role of
hole-carriers in elements that are not normally conducting but can be converted
to superconductors, however, remains unclear due to the lack of experimental
data. Here we report the first in-situ high pressure Hall effect measurements
on single crystal black phosphorus, measured up to ~ 50 GPa, and find a
correlation between the Hall coefficient and the superconducting transition
temperature (TC). Our results reveal that hole-carriers play a vital role in
developing superconductivity and enhancing TC. Importantly, we also find a
Lifshitz transition in the high-pressure cubic phase at ~17.2GPa, which
uncovers the origin of a puzzling valley in the superconducting TC-pressure
phase diagram. These results offer insight into the role of hole-carriers in
developing superconductivity in simple semiconducting solids under pressure. | Source: | arXiv, 1611.3330 | Services: | Forum | Review | PDF | Favorites |
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