Field-orientation dependence of the specific heat of PrOs4 Sb12

Jeroen Custers; Yukie Namai; Takashi Tayama; Toshiro Sakakibara; Hitoshi Sugawara; Yuji Aoki; Hideyuki Sato

doi:10.1016/j.physb.2006.01.069

Field-orientation dependence of the specific heat of PrOs₄ Sb₁₂

Jeroen Custers^*, Yukie Namai, Takashi Tayama, Toshiro Sakakibara, Hitoshi Sugawara, Yuji Aoki, Hideyuki Sato

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The superconducting (SC) gap of the Pr-based skutterudite PrOs₄ Sb₁₂ has been investigated by means of field-angle-dependent specific heat C ( H, φ{symbol} ) experiments. At fixed temperatures, H was varied and rotated in the basal planes. A 4-fold oscillation of C ( H, φ{symbol} ) is observed in the entire H-T SC phase diagram. The minima are located along the [ 1 0 0 ] directions suggesting the excistence of gap nodes or minima along these directions. The oscillation amplitude | A | becomes maximum at H / H_{c 2} ≈ 0.3. Below, | A | → 0. The temperature variation of | A | follows a quadratic dependence.

Original language	English
Pages (from-to)	179-181
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.069
State	Published - 2006/05/01

Keywords

Field-angle resolved specific heat
Heavy fermion
PrOs Sb
Skutterudite
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2006.01.069

Cite this

@article{346dc26a619048a5869c04f5f17fd52b,

title = "Field-orientation dependence of the specific heat of PrOs4 Sb12",

abstract = "The superconducting (SC) gap of the Pr-based skutterudite PrOs4 Sb12 has been investigated by means of field-angle-dependent specific heat C ( H, φ{symbol} ) experiments. At fixed temperatures, H was varied and rotated in the basal planes. A 4-fold oscillation of C ( H, φ{symbol} ) is observed in the entire H-T SC phase diagram. The minima are located along the [ 1 0 0 ] directions suggesting the excistence of gap nodes or minima along these directions. The oscillation amplitude | A | becomes maximum at H / Hc 2 ≈ 0.3. Below, | A | → 0. The temperature variation of | A | follows a quadratic dependence.",

keywords = "Field-angle resolved specific heat, Heavy fermion, PrOs Sb, Skutterudite, Superconductivity",

author = "Jeroen Custers and Yukie Namai and Takashi Tayama and Toshiro Sakakibara and Hitoshi Sugawara and Yuji Aoki and Hideyuki Sato",

note = "Funding Information: We are grateful to Y. Matsuda, K. Izawa, K. Machida, and P. Thalmeier for valuable discussions. The present work was supported by Grant-in-Aid for Scientific Research Priority Area “Skutterudite” (no. 15072203) of MEXT, Japan. J.C. was supported by the JSPS Post-doctoral Fellowship for Foreign Researchers. ",

year = "2006",

month = may,

day = "1",

doi = "10.1016/j.physb.2006.01.069",

language = "英語",

volume = "378-380",

pages = "179--181",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Field-orientation dependence of the specific heat of PrOs4 Sb12

AU - Custers, Jeroen

AU - Namai, Yukie

AU - Tayama, Takashi

AU - Sakakibara, Toshiro

AU - Sugawara, Hitoshi

AU - Aoki, Yuji

AU - Sato, Hideyuki

N1 - Funding Information: We are grateful to Y. Matsuda, K. Izawa, K. Machida, and P. Thalmeier for valuable discussions. The present work was supported by Grant-in-Aid for Scientific Research Priority Area “Skutterudite” (no. 15072203) of MEXT, Japan. J.C. was supported by the JSPS Post-doctoral Fellowship for Foreign Researchers.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - The superconducting (SC) gap of the Pr-based skutterudite PrOs4 Sb12 has been investigated by means of field-angle-dependent specific heat C ( H, φ{symbol} ) experiments. At fixed temperatures, H was varied and rotated in the basal planes. A 4-fold oscillation of C ( H, φ{symbol} ) is observed in the entire H-T SC phase diagram. The minima are located along the [ 1 0 0 ] directions suggesting the excistence of gap nodes or minima along these directions. The oscillation amplitude | A | becomes maximum at H / Hc 2 ≈ 0.3. Below, | A | → 0. The temperature variation of | A | follows a quadratic dependence.

AB - The superconducting (SC) gap of the Pr-based skutterudite PrOs4 Sb12 has been investigated by means of field-angle-dependent specific heat C ( H, φ{symbol} ) experiments. At fixed temperatures, H was varied and rotated in the basal planes. A 4-fold oscillation of C ( H, φ{symbol} ) is observed in the entire H-T SC phase diagram. The minima are located along the [ 1 0 0 ] directions suggesting the excistence of gap nodes or minima along these directions. The oscillation amplitude | A | becomes maximum at H / Hc 2 ≈ 0.3. Below, | A | → 0. The temperature variation of | A | follows a quadratic dependence.

KW - Field-angle resolved specific heat

KW - Heavy fermion

KW - PrOs Sb

KW - Skutterudite

KW - Superconductivity

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U2 - 10.1016/j.physb.2006.01.069

DO - 10.1016/j.physb.2006.01.069

M3 - 学術論文

AN - SCOPUS:33646431428

SN - 0921-4526

VL - 378-380

SP - 179

EP - 181

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - SPEC. ISS.

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