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Electronic disorders and magnetic-field-induced superconductivity enhancement in Fe1+y(Te1-xSex) | | Jin Hu
; Tijiang Liu
; Bin Qian
; Zhiqiang Mao
; | | Date: |
3 Nov 2011 | | Abstract: | We investigated the relationship between normal state and superconducting
properties in iron chalcogenide Fe1+y(Te1-xSex) through systematic specific
heat and Hall coefficient measurements. We found that, with an increase of Se
content in the underdoped superconducting region, the remarkable increase of
the superconducting volume fraction Vsc and the normal state metallicity occurs
when the normal state Sommerfeld coefficient and Hall coefficient drop
drastically. Additionally, Vsc is surprisingly enhanced by magnetic field.
These observations, plus Hall angle analyses, suggest that the suppression of
superconductivity in the underdoped region is associated with electronic
disorders caused by incoherent magnetic scattering arising from (pi,0) magnetic
fluctuations. | | Source: | arXiv, 1111.0699 | | Services: | Forum | Review | PDF | Favorites | |
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