TY - JOUR
T1 - High-resolution ac-calorimetry studies of the quasi-two-dimensional organic superconductor (formula presented)
AU - Müller, J.
AU - Lang, M.
AU - Helfrich, R.
AU - Steglich, F.
AU - Sasaki, T.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - We report high-resolution specific-heat measurements on the quasi-two-dimensional organic superconductor (formula presented) performed by using a sensitive ac-modulation technique. The main observations are (i) a discontinuity at (formula presented) much in excess of what is expected for a weak-coupling BCS superconductor and (ii) a quasiparticle contribution to the specific heat with an exponentially weak temperature dependence at (formula presented) The latter finding is incompatible with an order parameter that vanishes at certain parts of the Fermi surface. The data for (formula presented) can be well described by a strong-coupling extension of the BCS theory - the (formula presented)-model - similar to what has been recently found for the (formula presented) salt [Elsinger et al., Phys. Rev. Lett. 84, 6098 (2000)].
AB - We report high-resolution specific-heat measurements on the quasi-two-dimensional organic superconductor (formula presented) performed by using a sensitive ac-modulation technique. The main observations are (i) a discontinuity at (formula presented) much in excess of what is expected for a weak-coupling BCS superconductor and (ii) a quasiparticle contribution to the specific heat with an exponentially weak temperature dependence at (formula presented) The latter finding is incompatible with an order parameter that vanishes at certain parts of the Fermi surface. The data for (formula presented) can be well described by a strong-coupling extension of the BCS theory - the (formula presented)-model - similar to what has been recently found for the (formula presented) salt [Elsinger et al., Phys. Rev. Lett. 84, 6098 (2000)].
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U2 - 10.1103/PhysRevB.65.140509
DO - 10.1103/PhysRevB.65.140509
M3 - Article
AN - SCOPUS:85038274923
VL - 65
SP - 1
EP - 4
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 14
ER -