Anomalous quasiparticle excitations in Y(Ni1-xPtx)2B2C

K. Ohishi; K. Kakuta; J. Akimitsu; A. Koda; W. Higemoto; R. Kadono; J. E. Sonier; A. N. Price; R. I. Miller; R. F. Kiefl; Minoru Nohara; H. Suzuki; H. Takagi

doi:10.1016/S0921-4526(02)01628-9

Anomalous quasiparticle excitations in Y(Ni_1-xPt_x)₂B₂C

K. Ohishi, K. Kakuta, J. Akimitsu, A. Koda, W. Higemoto, R. Kadono, J. E. Sonier, A. N. Price, R. I. Miller, R. F. Kiefl, Minoru Nohara, H. Suzuki, H. Takagi

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

8 Citations (Scopus)

Abstract

We have found that although the magnetic penetration depth λ increases linearly in H in YNi₂B₂C, λ in Y(Ni_0.8Pt_0.2)₂B₂C was found to be independent of H for H ≤ 0.4H_c2, suggesting that the superconducting gap is effectively isotropic. These results are consistent with the change in the structure of order parameter suggested by photoelectron spectroscopy. However, λ in the Pt-doped sample is about 1.27 times larger than that estimated for an impurity effect, suggesting that the quasi-particles are not completely localized inside the vortex cores. Crown

Original language	English
Pages (from-to)	364-368
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	326
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4526(02)01628-9
Publication status	Published - Feb 2003
Externally published	Yes

Keywords

Borocarbide
Penetration depth
Quasi-particle excitations
Vortex core radius

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4526(02)01628-9

Cite this

@article{62bb34747af84b79951b832da400c694,

title = "Anomalous quasiparticle excitations in Y(Ni1-xPtx)2B2C",

abstract = "We have found that although the magnetic penetration depth λ increases linearly in H in YNi2B2C, λ in Y(Ni0.8Pt0.2)2B2C was found to be independent of H for H ≤ 0.4Hc2, suggesting that the superconducting gap is effectively isotropic. These results are consistent with the change in the structure of order parameter suggested by photoelectron spectroscopy. However, λ in the Pt-doped sample is about 1.27 times larger than that estimated for an impurity effect, suggesting that the quasi-particles are not completely localized inside the vortex cores. Crown",

keywords = "Borocarbide, Penetration depth, Quasi-particle excitations, Vortex core radius",

author = "K. Ohishi and K. Kakuta and J. Akimitsu and A. Koda and W. Higemoto and R. Kadono and Sonier, {J. E.} and Price, {A. N.} and Miller, {R. I.} and Kiefl, {R. F.} and Minoru Nohara and H. Suzuki and H. Takagi",

note = "Funding Information: We thank the TRIUMF μSR staff for technical support. This work was partially supported by a JSPS Research Fellowships for Young Scientists, Japan, by a Grant-in-Aid for Science Research on Priority Areas from the Ministry of Education, Culture, Sports, Science, and Technology, Japan and also by a Grant from the CREST, JST, Japan.",

year = "2003",

month = feb,

doi = "10.1016/S0921-4526(02)01628-9",

language = "English",

volume = "326",

pages = "364--368",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Anomalous quasiparticle excitations in Y(Ni1-xPtx)2B2C

AU - Ohishi, K.

AU - Kakuta, K.

AU - Akimitsu, J.

AU - Koda, A.

AU - Higemoto, W.

AU - Kadono, R.

AU - Sonier, J. E.

AU - Price, A. N.

AU - Miller, R. I.

AU - Kiefl, R. F.

AU - Nohara, Minoru

AU - Suzuki, H.

AU - Takagi, H.

N1 - Funding Information: We thank the TRIUMF μSR staff for technical support. This work was partially supported by a JSPS Research Fellowships for Young Scientists, Japan, by a Grant-in-Aid for Science Research on Priority Areas from the Ministry of Education, Culture, Sports, Science, and Technology, Japan and also by a Grant from the CREST, JST, Japan.

PY - 2003/2

Y1 - 2003/2

N2 - We have found that although the magnetic penetration depth λ increases linearly in H in YNi2B2C, λ in Y(Ni0.8Pt0.2)2B2C was found to be independent of H for H ≤ 0.4Hc2, suggesting that the superconducting gap is effectively isotropic. These results are consistent with the change in the structure of order parameter suggested by photoelectron spectroscopy. However, λ in the Pt-doped sample is about 1.27 times larger than that estimated for an impurity effect, suggesting that the quasi-particles are not completely localized inside the vortex cores. Crown

AB - We have found that although the magnetic penetration depth λ increases linearly in H in YNi2B2C, λ in Y(Ni0.8Pt0.2)2B2C was found to be independent of H for H ≤ 0.4Hc2, suggesting that the superconducting gap is effectively isotropic. These results are consistent with the change in the structure of order parameter suggested by photoelectron spectroscopy. However, λ in the Pt-doped sample is about 1.27 times larger than that estimated for an impurity effect, suggesting that the quasi-particles are not completely localized inside the vortex cores. Crown

KW - Borocarbide

KW - Penetration depth

KW - Quasi-particle excitations

KW - Vortex core radius

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U2 - 10.1016/S0921-4526(02)01628-9

DO - 10.1016/S0921-4526(02)01628-9

M3 - Article

AN - SCOPUS:0037302632

SN - 0921-4526

VL - 326

SP - 364

EP - 368

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-4

ER -