Abstract
Point contact spectroscopy reveals a gap-like feature above the magnetic and structural transition temperatures for underdoped Ba(Fe1-xCo x)2As2, SrFe2As2 and Fe1+yTe. The conductance spectrum starts showing an enhancement at temperatures as high as 177 K for BaFe2As2 (TN ∼ 132 K) and 250 K for SrFe2As2 (TN ∼ 192 K). Possible origins for this enhancement are discussed in light of recent experimental claims of nematicity in these materials. We construct a modified phase diagram for Co-doped Ba122 showing a gap-like feature existing above TN and TS for the underdoped regime.
Original language | English (US) |
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Article number | 022001 |
Journal | Journal of Physics: Conference Series |
Volume | 400 |
Issue number | PART 2 |
DOIs | |
State | Published - 2012 |
Event | 26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China Duration: Aug 10 2011 → Aug 17 2011 |
ASJC Scopus subject areas
- General Physics and Astronomy