تقرير
Coexistence of isotropic s-wave and extended s-wave order parameters in FeSe as revealed by the low-temperature specific heat
| العنوان: | Coexistence of isotropic s-wave and extended s-wave order parameters in FeSe as revealed by the low-temperature specific heat |
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| المؤلفون: | Lin, J. -Y., Hsieh, Y. S., Chareev, D. A., Vasiliev, A. N., Parsons, Y., Yang, H. D. |
| المصدر: | Physical Review B 84, 220507(R) (2011) |
| سنة النشر: | 2011 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The comprehensive low-temperature specific heat C(T) data identify both an isotropic s-wave and an extended s-wave order parameters coexisting in a superconducting single crystal FeSe with Tc=8.11 K. The isotropic gap {\Delta}0=1.33 meV on the hole Fermi sheets and the extended s-wave gap {\Delta}={\Delta}e(1+\alpha*cos2_theta) with {\Delta}e=1.13 meV and \alpha=0.78 on the electron Fermi sheets. The extended s-wave is rather anisotropic but the low energy quasiparticle excitations demonstrate no sign of the accidental nodes. The coefficient \gamma(H) manifesting the quasiparticle contribution to C is a non-linear function of the applied magnetic field H in the mixed state in accord with the anisotropic multi-order parameters. Comment: 4 figures, 2 tables. References updated. Changed title |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.84.220507 |
| URL الوصول: | http://arxiv.org/abs/1109.5225 |
| رقم الأكسشن: | edsarx.1109.5225 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.84.220507 |
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