Electronic phase transition and partially gapped Fermi surface in superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Lu</mml:mi></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ir</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msu

Shelton, R. N.; Hausermann-Berg, L.S.; Klavins, P.; Yang, H. D.; Anderson, M. S.; Swenson, C. A.

doi:10.1103/physrevb.34.4590

Cited by 81 publications

(87 citation statements)

References 17 publications

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“…In the normal state, the specific heat can be fitted with a Sommerfeld coefficient γ N of 22mJ/mol/K 2 and a Debye temperature of 320K, in good agreement with the previous report [12]. This Sommerfeld coefficient corresponds to a density of states at the Fermi level of 0.53 eV −1 .Å −3 per atom.…”

Section: Superconducting Propertiessupporting

confidence: 55%

“…The most surprising is the strong increase of the critical temperature of the superconducting transition: from 4.6K in the pure compound to 5.7K. A similar effect has already been clearly reported by substituting Si by Ge [11], or under pressure [12]. This further suggests that both orders are in competition for the same electrons.…”

Section: Competition Between Charge Density Wave and Superconductsupporting

confidence: 50%

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Charge Density Wave and Superconducting Properties in Single Crystals of Lu5Ir4Si10

Leroux

Rodière

Opagiste

2012

J Supercond Nov Magn

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We measured the electrical resistivity from 2K up to 900K on high quality single crystals of Lu5Ir4Si10. A clear thermal hysteresis was found at the onset of the Charge Density Wave (CDW), evidencing the first order nature of the transition. When tantalum is included in the compound, the CDW is destroyed and the superconducting critical temperature is enhanced. Finally, we present specific heat and magnetic penetration depth in the Meissner state. We show that the superconducting properties are very close to a weak coupling BCS superconductor.

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Section: Superconducting Propertiessupporting

confidence: 55%

Section: Competition Between Charge Density Wave and Superconductsupporting

confidence: 50%

Charge Density Wave and Superconducting Properties in Single Crystals of Lu5Ir4Si10

Leroux

Rodière

Opagiste

2012

J Supercond Nov Magn

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“…We have begun a quest for new CDW systems in intermetallic rare-earth (RE) compounds and found indications in the literature [8][9][10] for such behavior in a series of RE 5 Ir 4 Si 10 materials. Polycrystalline samples showed anomalies in the resistivity above 20 K, which were tentatively attributed to CDW or SDW (spin-density-wave) formation [8].…”

Section: (Received 18 January 2000)mentioning

confidence: 99%

“…However, in order to probe the theory further and search for novel CDW behaviors, especially those involving the interplay with magnetism, new classes of materials are needed. To the best of our knowledge there does not exist a local-moment magnet (mediated by the RKKY interaction between the f and conduction electrons) exhibiting a CDW.We have begun a quest for new CDW systems in intermetallic rare-earth (RE) compounds and found indications in the literature [8][9][10] for such behavior in a series of RE 5 Ir 4 Si 10 materials. Polycrystalline samples showed anomalies in the resistivity above 20 K, which were tentatively attributed to CDW or SDW (spin-density-wave) formation [8].…”

mentioning

confidence: 99%

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Charge-Density-Wave Transitions in the Local-Moment MagnetEr5Ir4Si10

et al. 2000

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We report the observation of a new type of charge-density wave (CDW) in the large magnetic-moment rare-earth intermetallic compound, Er 5 Ir 4 Si 10 , which then orders magnetically at low temperatures. Single crystal x-ray diffraction shows the development of a 1D incommensurate CDW at 155 K, which then locks into a purely commensurate state below 55 K. The well-localized Er 31 moments are antiferromagnetically ordered below 2.8 K. We observe very sharp anomalies in the specific heat at 145 and 2.8 K, signifying the bulk nature of these transitions. Our data suggest the coexistence of strongly coupled CDW with local-moment antiferromagnetism in Er 5 Ir 4 Si 10 . PACS numbers: 71.45.Lr, 75.20.Hr, 71.20.Lp Charge-density-wave (CDW) transitions occur in lowdimensional solids where it is possible to achieve nesting of Fermi surfaces that leads to the appearance of a periodic lattice distortion with an accompanying energy gap D [1-4]. These materials show striking nonlinear and anisotropic properties as well as unusual elastic and dynamic behaviors: This makes them an appealing field for experimental and theoretical studies on Fermi surface gapping and electron-phonon coupling. A number of such systems have been previously studied, including quasi-1D organic salts (e.g., TTF-TCNQ) [5] and inorganic chain compounds (e.g., NbSe 3 ) [2]. Here a Peierls-Fröhlich-type [4] phase transformation is observed at a finite temperature T CDW : Above this temperature the coupled electronphonon system is unstable with respect to a deformation of wave vector q 2k F . Below T CDW , the ground state is characterized by a gap in the single-particle excitation spectrum.Although many of the properties of these quasi-1D compounds could be understood within the framework of this continuous phase transition with weak electronphonon and interchain coupling, the thermodynamic behavior of the CDW transition in compounds such as TaSe 2 [6] and the blue bronzes [3] requires a description beyond the weak-coupling model. McMillan [7], using strong electron-phonon coupling and small interchain correlation lengths, was able to provide a microscopic theory, which has given a semiquantitative explanation for the peculiar behavior of these latter systems, like their specific heat jumps and D͞T CDW ratios. In recent years interest in this area has focused on detailed investigation of these conventional CDW systems. However, in order to probe the theory further and search for novel CDW behaviors, especially those involving the interplay with magnetism, new classes of materials are needed. To the best of our knowledge there does not exist a local-moment magnet (mediated by the RKKY interaction between the f and conduction electrons) exhibiting a CDW.We have begun a quest for new CDW systems in intermetallic rare-earth (RE) compounds and found indications in the literature [8][9][10] for such behavior in a series of RE 5 Ir 4 Si 10 materials. Polycrystalline samples showed anomalies in the resistivity above 20 K, which were tentatively attributed to CD...

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Flükiger¹,

Wolf²

Landolt-Börnstein - Group III Condensed Matter

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Electronic phase transition and partially gapped Fermi surface in superconductingLu5Ir4

Cited by 81 publications

References 17 publications

Charge Density Wave and Superconducting Properties in Single Crystals of Lu5Ir4Si10

Charge Density Wave and Superconducting Properties in Single Crystals of Lu5Ir4Si10

Charge-Density-Wave Transitions in the Local-Moment MagnetEr5Ir4Si10

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