Gap-like feature in the normal state of X(Fe1-xCo x)2As2, X = Ba, Sr and Fe1+yTe revealed by point contact spectroscopy

H. Z. Arham; C. R. Hunt; W. K. Park; J. Gillett; S. D. Das; S. E. Sebastian; Z. J. Xu; J. S. Wen; Z. W. Lin; Q. Li; G. Gu; A. Thaler; S. L. Budko; P. C. Canfield; L. H. Greene

doi:10.1088/1742-6596/400/2/022001

Gap-like feature in the normal state of X(Fe_1-xCo _x)₂As₂, X = Ba, Sr and Fe_1+yTe revealed by point contact spectroscopy

H. Z. Arham, C. R. Hunt, W. K. Park, J. Gillett, S. D. Das, S. E. Sebastian, Z. J. Xu, J. S. Wen, Z. W. Lin, Q. Li, G. Gu, A. Thaler, S. L. Budko, P. C. Canfield, L. H. Greene

Physics

Research output: Contribution to journal › Conference article

Abstract

Point contact spectroscopy reveals a gap-like feature above the magnetic and structural transition temperatures for underdoped Ba(Fe_1-xCo _x)₂As₂, SrFe₂As₂ and Fe_1+yTe. The conductance spectrum starts showing an enhancement at temperatures as high as 177 K for BaFe₂As₂ (T_N ∼ 132 K) and 250 K for SrFe₂As₂ (T_N ∼ 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 T_N and T_S for the underdoped regime.

Original language	English (US)
Article number	022001
Journal	Journal of Physics: Conference Series
Volume	400
Issue number	PART 2
DOIs	https://doi.org/10.1088/1742-6596/400/2/022001
State	Published - Jan 1 2012
Event	26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China Duration: Aug 10 2011 → Aug 17 2011

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/400/2/022001

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Arham, H. Z., Hunt, C. R., Park, W. K., Gillett, J., Das, S. D., Sebastian, S. E., Xu, Z. J., Wen, J. S., Lin, Z. W., Li, Q., Gu, G., Thaler, A., Budko, S. L., Canfield, P. C., & Greene, L. H. (2012). Gap-like feature in the normal state of X(Fe_1-xCo _x)₂As₂, X = Ba, Sr and Fe_1+yTe revealed by point contact spectroscopy. Journal of Physics: Conference Series, 400(PART 2), [022001]. https://doi.org/10.1088/1742-6596/400/2/022001

Gap-like feature in the normal state of X(Fe_1-xCo _x)₂As₂, X = Ba, Sr and Fe_1+yTe revealed by point contact spectroscopy. / Arham, H. Z.; Hunt, C. R.; Park, W. K.; Gillett, J.; Das, S. D.; Sebastian, S. E.; Xu, Z. J.; Wen, J. S.; Lin, Z. W.; Li, Q.; Gu, G.; Thaler, A.; Budko, S. L.; Canfield, P. C.; Greene, L. H.

In: Journal of Physics: Conference Series, Vol. 400, No. PART 2, 022001, 01.01.2012.

Research output: Contribution to journal › Conference article

Arham, HZ, Hunt, CR, Park, WK, Gillett, J, Das, SD, Sebastian, SE, Xu, ZJ, Wen, JS, Lin, ZW, Li, Q, Gu, G, Thaler, A, Budko, SL, Canfield, PC & Greene, LH 2012, 'Gap-like feature in the normal state of X(Fe_1-xCo _x)₂As₂, X = Ba, Sr and Fe_1+yTe revealed by point contact spectroscopy', Journal of Physics: Conference Series, vol. 400, no. PART 2, 022001. https://doi.org/10.1088/1742-6596/400/2/022001

Arham, H. Z. ; Hunt, C. R. ; Park, W. K. ; Gillett, J. ; Das, S. D. ; Sebastian, S. E. ; Xu, Z. J. ; Wen, J. S. ; Lin, Z. W. ; Li, Q. ; Gu, G. ; Thaler, A. ; Budko, S. L. ; Canfield, P. C. ; Greene, L. H. / Gap-like feature in the normal state of X(Fe_1-xCo _x)₂As₂, X = Ba, Sr and Fe_1+yTe revealed by point contact spectroscopy. In: Journal of Physics: Conference Series. 2012 ; Vol. 400, No. PART 2.

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title = "Gap-like feature in the normal state of X(Fe1-xCo x)2As2, X = Ba, Sr and Fe1+yTe revealed by point contact spectroscopy",

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.",

author = "Arham, {H. Z.} and Hunt, {C. R.} and Park, {W. K.} and J. Gillett and Das, {S. D.} and Sebastian, {S. E.} and Xu, {Z. J.} and Wen, {J. S.} and Lin, {Z. W.} and Q. Li and G. Gu and A. Thaler and Budko, {S. L.} and Canfield, {P. C.} and Greene, {L. H.}",

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T1 - Gap-like feature in the normal state of X(Fe1-xCo x)2As2, X = Ba, Sr and Fe1+yTe revealed by point contact spectroscopy

AU - Arham, H. Z.

AU - Hunt, C. R.

AU - Park, W. K.

AU - Gillett, J.

AU - Das, S. D.

AU - Sebastian, S. E.

AU - Xu, Z. J.

AU - Wen, J. S.

AU - Lin, Z. W.

AU - Li, Q.

AU - Gu, G.

AU - Thaler, A.

AU - Budko, S. L.

AU - Canfield, P. C.

AU - Greene, L. H.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - 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.

AB - 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.

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