Abstract
We investigated temperature, field, and field-orientation dependences of the specific heat of CeIrIn5. The upper critical field Hc2 was determined down to 80 mK from the specific heat measurements and exhibits a slight suppression at low temperatures. We revealed that the specific heat at 80 mK increases proportional to the square root of H up to nearly Hc2 for both H ∥ ab and H ∥ c, implying the presence of line nodes and a weak contribution of the Pauli paramagnetic pair-breaking effect. Furthermore, we revealed that the specific heat shows a fourfold oscillation under a rotating magnetic field in the ab plane. This result indicates that CeIrIn 5has fourfold symmetry around the c axis in its gap amplitude.
| Original language | English |
|---|---|
| Article number | SB014 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 81 |
| Issue number | SUPPL.B |
| Publication status | Published - Sep 2012 |
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Keywords
- CeIrIn
- Heavy fermion
- Specific heat
- Superconducting gap
- Superconductor
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Field dependence of the specific heat in a heavy-fermion superconductor CeIrIn5. / Aoki, Yuya; Kittaka, Shunichiro; Sakakibara, Toshiro; Sakai, Akito; Nakatsuji, Satoru; Tsutsumi, Yasumasa; Ichioka, Masanori; Machida, Kazushige.
In: Journal of the Physical Society of Japan, Vol. 81, No. SUPPL.B, SB014, 09.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Field dependence of the specific heat in a heavy-fermion superconductor CeIrIn5
AU - Aoki, Yuya
AU - Kittaka, Shunichiro
AU - Sakakibara, Toshiro
AU - Sakai, Akito
AU - Nakatsuji, Satoru
AU - Tsutsumi, Yasumasa
AU - Ichioka, Masanori
AU - Machida, Kazushige
PY - 2012/9
Y1 - 2012/9
N2 - We investigated temperature, field, and field-orientation dependences of the specific heat of CeIrIn5. The upper critical field Hc2 was determined down to 80 mK from the specific heat measurements and exhibits a slight suppression at low temperatures. We revealed that the specific heat at 80 mK increases proportional to the square root of H up to nearly Hc2 for both H ∥ ab and H ∥ c, implying the presence of line nodes and a weak contribution of the Pauli paramagnetic pair-breaking effect. Furthermore, we revealed that the specific heat shows a fourfold oscillation under a rotating magnetic field in the ab plane. This result indicates that CeIrIn 5has fourfold symmetry around the c axis in its gap amplitude.
AB - We investigated temperature, field, and field-orientation dependences of the specific heat of CeIrIn5. The upper critical field Hc2 was determined down to 80 mK from the specific heat measurements and exhibits a slight suppression at low temperatures. We revealed that the specific heat at 80 mK increases proportional to the square root of H up to nearly Hc2 for both H ∥ ab and H ∥ c, implying the presence of line nodes and a weak contribution of the Pauli paramagnetic pair-breaking effect. Furthermore, we revealed that the specific heat shows a fourfold oscillation under a rotating magnetic field in the ab plane. This result indicates that CeIrIn 5has fourfold symmetry around the c axis in its gap amplitude.
KW - CeIrIn
KW - Heavy fermion
KW - Specific heat
KW - Superconducting gap
KW - Superconductor
UR - http://www.scopus.com/inward/record.url?scp=84871812416&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871812416&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84871812416
VL - 81
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - SUPPL.B
M1 - SB014
ER -