A change of the Fermi surface in UGe2 across the critical pressure

R. Settai, M. Nakashima, Shingo Araki, Y. Haga, Tatsuo Kobayashi, N. Tateiwa, H. Yamagami, Y. Onuki

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named α, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from P*c (≃1.2 GPa) to pc (≃1.5 GPa) the dHvA signal disappears completely, where pc and p*c correspond to critical pressures for a Curie temperature TC and the second phase transition temperature T* (C), respectively. For p > pc we observed new dHvA branches with large cyclotron masses of 19-64m0, which correspond to main Fermi surfaces in the paramagnetic state.

Original languageEnglish
Pages (from-to)L29-L36
Number of pages8
JournalJournal of Physics Condensed Matter
Volume14
Issue number1
DOIs
Publication statusPublished - Jan 14 2002
Externally publishedYes

Fingerprint

Fermi surface
critical pressure
Fermi surfaces
cyclotrons
Curie temperature
Cyclotrons
transition temperature
Superconducting transition temperature
Phase transitions
Experiments

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

A change of the Fermi surface in UGe2 across the critical pressure. / Settai, R.; Nakashima, M.; Araki, Shingo; Haga, Y.; Kobayashi, Tatsuo; Tateiwa, N.; Yamagami, H.; Onuki, Y.

In: Journal of Physics Condensed Matter, Vol. 14, No. 1, 14.01.2002, p. L29-L36.

Research output: Contribution to journalArticle

Settai, R. ; Nakashima, M. ; Araki, Shingo ; Haga, Y. ; Kobayashi, Tatsuo ; Tateiwa, N. ; Yamagami, H. ; Onuki, Y. / A change of the Fermi surface in UGe2 across the critical pressure. In: Journal of Physics Condensed Matter. 2002 ; Vol. 14, No. 1. pp. L29-L36.
@article{03ceab1c2f94440182003457ead3418c,
title = "A change of the Fermi surface in UGe2 across the critical pressure",
abstract = "We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named α, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from P*c (≃1.2 GPa) to pc (≃1.5 GPa) the dHvA signal disappears completely, where pc and p*c correspond to critical pressures for a Curie temperature TC and the second phase transition temperature T* (C), respectively. For p > pc we observed new dHvA branches with large cyclotron masses of 19-64m0, which correspond to main Fermi surfaces in the paramagnetic state.",
author = "R. Settai and M. Nakashima and Shingo Araki and Y. Haga and Tatsuo Kobayashi and N. Tateiwa and H. Yamagami and Y. Onuki",
year = "2002",
month = "1",
day = "14",
doi = "10.1088/0953-8984/14/1/104",
language = "English",
volume = "14",
pages = "L29--L36",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - A change of the Fermi surface in UGe2 across the critical pressure

AU - Settai, R.

AU - Nakashima, M.

AU - Araki, Shingo

AU - Haga, Y.

AU - Kobayashi, Tatsuo

AU - Tateiwa, N.

AU - Yamagami, H.

AU - Onuki, Y.

PY - 2002/1/14

Y1 - 2002/1/14

N2 - We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named α, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from P*c (≃1.2 GPa) to pc (≃1.5 GPa) the dHvA signal disappears completely, where pc and p*c correspond to critical pressures for a Curie temperature TC and the second phase transition temperature T* (C), respectively. For p > pc we observed new dHvA branches with large cyclotron masses of 19-64m0, which correspond to main Fermi surfaces in the paramagnetic state.

AB - We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named α, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from P*c (≃1.2 GPa) to pc (≃1.5 GPa) the dHvA signal disappears completely, where pc and p*c correspond to critical pressures for a Curie temperature TC and the second phase transition temperature T* (C), respectively. For p > pc we observed new dHvA branches with large cyclotron masses of 19-64m0, which correspond to main Fermi surfaces in the paramagnetic state.

UR - http://www.scopus.com/inward/record.url?scp=0037074517&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037074517&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/14/1/104

DO - 10.1088/0953-8984/14/1/104

M3 - Article

AN - SCOPUS:0037074517

VL - 14

SP - L29-L36

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 1

ER -