Wang, X. P., Richard, P., Shi, X., Roekeghem, A., Huang, Y. B., Razzoli, E., Qian, T., Rienks, E., Thirupathaiah, S., Wang, H. D., Dong, C. H., Fang, M. H., Shi, M., & Ding, H. (2012). Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2. EPL, 99(6), Article 67001. https://doi.org/10.1209/0295-5075/99/67001
Wang, X. P. ; Richard, P. ; Shi, X. et al. / Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2. In: EPL. 2012 ; Vol. 99, No. 6.
@article{92ebfc994f7744498a18c7c40bfa391a,
title = "Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2",
abstract = "We performed a high-resolution angle-resolved photoemission spectroscopy study on superconducting (SC) Tl 0.63K 0.37Fe 1.78Se 2 (T c=29K) in the whole Brillouin zone (BZ). In addition to a nearly isotropic 8.2meV 2-dimensional (2D) SC gap (2Δ/k BT c7) on quasi-2D electron Fermi surfaces (FSs) located around M(π,0,0)-A(π,0,π), we observe a 6.2meV isotropic SC gap (2Δ/k BT c5) on the Z-centred electron FS that rules out any d-wave pairing symmetry and rather favors an s-wave symmetry. All isotropic SC gap amplitudes can be fit by a single-gap function derived from a local strong-coupling approach suggesting an enhancement of the next-nearest neighbor exchange interaction in the ferrochalcogenide superconductors.",
author = "Wang, {X. P.} and P. Richard and X. Shi and A. Roekeghem and Huang, {Y. B.} and E. Razzoli and T. Qian and E. Rienks and S. Thirupathaiah and Wang, {H. D.} and Dong, {C. H.} and Fang, {M. H.} and M. Shi and H. Ding",
year = "2012",
month = sep,
doi = "10.1209/0295-5075/99/67001",
language = "English",
volume = "99",
journal = "EPL",
issn = "0295-5075",
publisher = "IOP Publishing Ltd.",
number = "6",
}
Wang, XP, Richard, P, Shi, X, Roekeghem, A, Huang, YB, Razzoli, E, Qian, T, Rienks, E, Thirupathaiah, S, Wang, HD, Dong, CH, Fang, MH, Shi, M & Ding, H 2012, 'Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2', EPL, vol. 99, no. 6, 67001. https://doi.org/10.1209/0295-5075/99/67001
Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2. / Wang, X. P.; Richard, P.
; Shi, X. et al.
In:
EPL, Vol. 99, No. 6, 67001, 09.2012.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2
AU - Wang, X. P.
AU - Richard, P.
AU - Shi, X.
AU - Roekeghem, A.
AU - Huang, Y. B.
AU - Razzoli, E.
AU - Qian, T.
AU - Rienks, E.
AU - Thirupathaiah, S.
AU - Wang, H. D.
AU - Dong, C. H.
AU - Fang, M. H.
AU - Shi, M.
AU - Ding, H.
PY - 2012/9
Y1 - 2012/9
N2 - We performed a high-resolution angle-resolved photoemission spectroscopy study on superconducting (SC) Tl 0.63K 0.37Fe 1.78Se 2 (T c=29K) in the whole Brillouin zone (BZ). In addition to a nearly isotropic 8.2meV 2-dimensional (2D) SC gap (2Δ/k BT c7) on quasi-2D electron Fermi surfaces (FSs) located around M(π,0,0)-A(π,0,π), we observe a 6.2meV isotropic SC gap (2Δ/k BT c5) on the Z-centred electron FS that rules out any d-wave pairing symmetry and rather favors an s-wave symmetry. All isotropic SC gap amplitudes can be fit by a single-gap function derived from a local strong-coupling approach suggesting an enhancement of the next-nearest neighbor exchange interaction in the ferrochalcogenide superconductors.
AB - We performed a high-resolution angle-resolved photoemission spectroscopy study on superconducting (SC) Tl 0.63K 0.37Fe 1.78Se 2 (T c=29K) in the whole Brillouin zone (BZ). In addition to a nearly isotropic 8.2meV 2-dimensional (2D) SC gap (2Δ/k BT c7) on quasi-2D electron Fermi surfaces (FSs) located around M(π,0,0)-A(π,0,π), we observe a 6.2meV isotropic SC gap (2Δ/k BT c5) on the Z-centred electron FS that rules out any d-wave pairing symmetry and rather favors an s-wave symmetry. All isotropic SC gap amplitudes can be fit by a single-gap function derived from a local strong-coupling approach suggesting an enhancement of the next-nearest neighbor exchange interaction in the ferrochalcogenide superconductors.
UR - http://www.scopus.com/inward/record.url?scp=84867150719&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/99/67001
DO - 10.1209/0295-5075/99/67001
M3 - Article
AN - SCOPUS:84867150719
SN - 0295-5075
VL - 99
JO - EPL
JF - EPL
IS - 6
M1 - 67001
ER -
Wang XP, Richard P, Shi X, Roekeghem A, Huang YB, Razzoli E et al. Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl 0.63K 0.37Fe 1.78Se 2. EPL. 2012 Sept;99(6):67001. doi: 10.1209/0295-5075/99/67001
