Cu-NQR study of CeCu2(Si0.98Ge0.02)2 under hydrostatic pressure

Y. Kawasaki; K. Ishida; K. Obinata; T. Mito; G. Q. Zheng; Y. Kitaoka; C. Geibel; F. Steglich

doi:10.1016/S0921-4526(01)01531-9

Cu-NQR study of CeCu₂(Si_0.98Ge_0.02)₂ under hydrostatic pressure

Y. Kawasaki, K. Ishida, K. Obinata, T. Mito, G. Q. Zheng, Y. Kitaoka, C. Geibel, F. Steglich

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

We report a pressure effect on CeCu₂(Si_0.98Ge_0.02)₂ where an antiferromagnetic order below T_N∼0.75 K coexists with superconductivity below T_c∼0.4 K. At pressures exceeding 0.56 GPa, the magnetic order is suppressed and concomitantly the unconventional superconducting state evolves into a typical heavy-fermion one with a line-node gap. This result demonstrates that the magnetic order is due to the lattice expansion caused by doping Ge. We remark that the characteristic feature of exotic coexisting state at ambient pressure is the persistence of low-lying magnetic excitations even in the superconducting state.

Original language	English
Pages (from-to)	428-430
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01531-9
Publication status	Published - Mar 2002
Externally published	Yes
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: Aug 6 2002 → Aug 6 2002

Keywords

CeCuSi
NQR
Pressure

ASJC Scopus subject areas

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

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@article{7a97a5be88f444429392cb9a9b964e6c,

title = "Cu-NQR study of CeCu2(Si0.98Ge0.02)2 under hydrostatic pressure",

abstract = "We report a pressure effect on CeCu2(Si0.98Ge0.02)2 where an antiferromagnetic order below TN∼0.75 K coexists with superconductivity below Tc∼0.4 K. At pressures exceeding 0.56 GPa, the magnetic order is suppressed and concomitantly the unconventional superconducting state evolves into a typical heavy-fermion one with a line-node gap. This result demonstrates that the magnetic order is due to the lattice expansion caused by doping Ge. We remark that the characteristic feature of exotic coexisting state at ambient pressure is the persistence of low-lying magnetic excitations even in the superconducting state.",

keywords = "CeCuSi, NQR, Pressure",

author = "Y. Kawasaki and K. Ishida and K. Obinata and T. Mito and Zheng, {G. Q.} and Y. Kitaoka and C. Geibel and F. Steglich",

note = "Funding Information: This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. One of the authors (Y.K.) has been supported by JSPS Research Fellowships for Young Scientists.; International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

year = "2002",

month = mar,

doi = "10.1016/S0921-4526(01)01531-9",

language = "English",

volume = "312-313",

pages = "428--430",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

T1 - Cu-NQR study of CeCu2(Si0.98Ge0.02)2 under hydrostatic pressure

AU - Kawasaki, Y.

AU - Ishida, K.

AU - Obinata, K.

AU - Mito, T.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Geibel, C.

AU - Steglich, F.

N1 - Funding Information: This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. One of the authors (Y.K.) has been supported by JSPS Research Fellowships for Young Scientists.

PY - 2002/3

Y1 - 2002/3

N2 - We report a pressure effect on CeCu2(Si0.98Ge0.02)2 where an antiferromagnetic order below TN∼0.75 K coexists with superconductivity below Tc∼0.4 K. At pressures exceeding 0.56 GPa, the magnetic order is suppressed and concomitantly the unconventional superconducting state evolves into a typical heavy-fermion one with a line-node gap. This result demonstrates that the magnetic order is due to the lattice expansion caused by doping Ge. We remark that the characteristic feature of exotic coexisting state at ambient pressure is the persistence of low-lying magnetic excitations even in the superconducting state.

AB - We report a pressure effect on CeCu2(Si0.98Ge0.02)2 where an antiferromagnetic order below TN∼0.75 K coexists with superconductivity below Tc∼0.4 K. At pressures exceeding 0.56 GPa, the magnetic order is suppressed and concomitantly the unconventional superconducting state evolves into a typical heavy-fermion one with a line-node gap. This result demonstrates that the magnetic order is due to the lattice expansion caused by doping Ge. We remark that the characteristic feature of exotic coexisting state at ambient pressure is the persistence of low-lying magnetic excitations even in the superconducting state.

KW - CeCuSi

KW - NQR

KW - Pressure

UR - http://www.scopus.com/inward/record.url?scp=0036503322&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036503322&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(01)01531-9

DO - 10.1016/S0921-4526(01)01531-9

M3 - Conference article

AN - SCOPUS:0036503322

VL - 312-313

SP - 428

EP - 430

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

T2 - International Conference on Strongly Correlated Electrons

Y2 - 6 August 2002 through 6 August 2002

ER -