Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe3 under pressure: A 73Ge-nuclear-quadrupole-resonance study

Atsushi Harada; Hidekazu Mukuda; Yoshio Kitaoka; Arumugam Thamizhavel; Yusuke Okuda; Rikio Settai; Yoshichika Onuki; Kouhei M. Itoh; Eugene E. Haller; Hisatomo Harima

doi:10.1143/JPSJ.77.103710

Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe₃ under pressure: A ⁷³Ge-nuclear-quadrupole-resonance study

Atsushi Harada, Hidekazu Mukuda, Yoshio Kitaoka, Arumugam Thamizhavel, Yusuke Okuda, Rikio Settai, Yoshichika Onuki, Kouhei M. Itoh, Eugene E. Haller, Hisatomo Harima

President

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

7 Citations (Scopus)

Abstract

We report a ⁷³Ge nuclear-quadrupole-resonance (NQR) study on novel evolution of unconventional superconductivity in antiferromagnetic (AFM) CeNiGe₃. The measurements of the ⁷³Ge-NQR spectrum and the nuclear spin-lattice relaxation rate (1=T₁) have revealed that the unconventional superconductivity evolves inside a commensurate AFM phase around the pressure (P) where Néel temperature T_N exhibits its maximum at 8.5 K. The superconducting transition temperature T_SC has been found to be enhanced with increasing T_N, before reaching the quantum critical point at which the AFM order collapses. Above T_SC, the AFM structure transits from an incommensurate spin-density-wave order to a commensurate AFM order at T ∼ 2 K, accompanied by a longitudinal spin-density fluctuation. With regard to heavy-fermion compounds, these novel phenomena have hitherto never been reported in the P-T phase diagram.

Original language	English
Article number	103710
Journal	Journal of the Physical Society of Japan
Volume	77
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.77.103710
Publication status	Published - 2008 Oct

Keywords

CeNiGe
Commensurate and incommensurate antiferromagnetism
Heavy fermion
NQR under pressure
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.77.103710

Cite this

Harada, A., Mukuda, H., Kitaoka, Y., Thamizhavel, A., Okuda, Y., Settai, R., Onuki, Y., Itoh, K. M., Haller, E. E., & Harima, H. (2008). Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe₃ under pressure: A ⁷³Ge-nuclear-quadrupole-resonance study. Journal of the Physical Society of Japan, 77(10), [103710]. https://doi.org/10.1143/JPSJ.77.103710

Harada, A, Mukuda, H, Kitaoka, Y, Thamizhavel, A, Okuda, Y, Settai, R, Onuki, Y, Itoh, KM, Haller, EE & Harima, H 2008, 'Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe₃ under pressure: A ⁷³Ge-nuclear-quadrupole-resonance study', Journal of the Physical Society of Japan, vol. 77, no. 10, 103710. https://doi.org/10.1143/JPSJ.77.103710

@article{362458bc9fc04acc8a609b9f25789a42,

title = "Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe3 under pressure: A 73Ge-nuclear-quadrupole-resonance study",

abstract = "We report a 73Ge nuclear-quadrupole-resonance (NQR) study on novel evolution of unconventional superconductivity in antiferromagnetic (AFM) CeNiGe3. The measurements of the 73Ge-NQR spectrum and the nuclear spin-lattice relaxation rate (1=T1) have revealed that the unconventional superconductivity evolves inside a commensurate AFM phase around the pressure (P) where N{\'e}el temperature TN exhibits its maximum at 8.5 K. The superconducting transition temperature TSC has been found to be enhanced with increasing TN, before reaching the quantum critical point at which the AFM order collapses. Above TSC, the AFM structure transits from an incommensurate spin-density-wave order to a commensurate AFM order at T ∼ 2 K, accompanied by a longitudinal spin-density fluctuation. With regard to heavy-fermion compounds, these novel phenomena have hitherto never been reported in the P-T phase diagram.",

keywords = "CeNiGe, Commensurate and incommensurate antiferromagnetism, Heavy fermion, NQR under pressure, Superconductivity",

author = "Atsushi Harada and Hidekazu Mukuda and Yoshio Kitaoka and Arumugam Thamizhavel and Yusuke Okuda and Rikio Settai and Yoshichika Onuki and Itoh, {Kouhei M.} and Haller, {Eugene E.} and Hisatomo Harima",

year = "2008",

month = oct,

doi = "10.1143/JPSJ.77.103710",

language = "English",

volume = "77",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "10",

}

TY - JOUR

T1 - Evolution of an unconventional superconducting state inside the antiferromagnetic phase of CeNiGe3 under pressure

T2 - A 73Ge-nuclear-quadrupole-resonance study

AU - Harada, Atsushi

AU - Mukuda, Hidekazu

AU - Kitaoka, Yoshio

AU - Thamizhavel, Arumugam

AU - Okuda, Yusuke

AU - Settai, Rikio

AU - Onuki, Yoshichika

AU - Itoh, Kouhei M.

AU - Haller, Eugene E.

AU - Harima, Hisatomo

PY - 2008/10

Y1 - 2008/10

N2 - We report a 73Ge nuclear-quadrupole-resonance (NQR) study on novel evolution of unconventional superconductivity in antiferromagnetic (AFM) CeNiGe3. The measurements of the 73Ge-NQR spectrum and the nuclear spin-lattice relaxation rate (1=T1) have revealed that the unconventional superconductivity evolves inside a commensurate AFM phase around the pressure (P) where Néel temperature TN exhibits its maximum at 8.5 K. The superconducting transition temperature TSC has been found to be enhanced with increasing TN, before reaching the quantum critical point at which the AFM order collapses. Above TSC, the AFM structure transits from an incommensurate spin-density-wave order to a commensurate AFM order at T ∼ 2 K, accompanied by a longitudinal spin-density fluctuation. With regard to heavy-fermion compounds, these novel phenomena have hitherto never been reported in the P-T phase diagram.

AB - We report a 73Ge nuclear-quadrupole-resonance (NQR) study on novel evolution of unconventional superconductivity in antiferromagnetic (AFM) CeNiGe3. The measurements of the 73Ge-NQR spectrum and the nuclear spin-lattice relaxation rate (1=T1) have revealed that the unconventional superconductivity evolves inside a commensurate AFM phase around the pressure (P) where Néel temperature TN exhibits its maximum at 8.5 K. The superconducting transition temperature TSC has been found to be enhanced with increasing TN, before reaching the quantum critical point at which the AFM order collapses. Above TSC, the AFM structure transits from an incommensurate spin-density-wave order to a commensurate AFM order at T ∼ 2 K, accompanied by a longitudinal spin-density fluctuation. With regard to heavy-fermion compounds, these novel phenomena have hitherto never been reported in the P-T phase diagram.

KW - CeNiGe

KW - Commensurate and incommensurate antiferromagnetism

KW - Heavy fermion

KW - NQR under pressure

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=54349109540&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=54349109540&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.77.103710

DO - 10.1143/JPSJ.77.103710

M3 - Article

AN - SCOPUS:54349109540

SN - 0031-9015

VL - 77

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 10

M1 - 103710

ER -