Huge Lattice Softening inCeRu2without Structural Transition

Suzuki, Takashi; Goshima, H.; Sakita, S.; Fujita, Toshizo; Hedo, Masato; Inada, Yuji; Yamamoto, Etsuji; Haga, Yoshinori; Ōnuki, Yoshichika

doi:10.1143/jpsj.65.2753

Cited by 24 publications

(17 citation statements)

References 10 publications

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“…Large elastic anomalies compared with those of iron-based materials have been reported in the A15 superconductor V 3 Si and the Laves-phase superconductor CeRu 2 so far. 18,19) These anomalies have been ascribed to the large density of states at the Fermi energy. 3d orbitals form bands in an ironbased superconductor.…”

Section: Analysis Based On Band Picturementioning

confidence: 99%

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

et al. 2012

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We investigated the elastic properties of the iron-based superconductor Ba(Fe 1Àx Co x ) 2 As 2 with eight Co concentrations. The elastic constant C 66 shows a large elastic softening associated with structural phase transition. C 66 was analyzed on the basis of the localized and itinerant pictures of Fe-3d electrons, which shows a strong electronlattice coupling and a possible mass enhancement in this system. The results are similar to those of unconventional superconductors, where the properties of the system are governed by quantum fluctuations associated with the zerotemperature critical point of long-range order, namely, the quantum critical point (QCP). In this system, the inverse of C 66 behaves just like the magnetic susceptibility in magnetic QCP systems. Although the QCPs of these existing superconductors are all ascribed to antiferromagnetism, our systematic studies on the canonical iron-based superconductor Ba(Fe 1Àx Co x ) 2 As 2 have revealed that there is a signature of ''structural quantum criticality'' in this material, which thus far has had no precedent. The elastic constant anomaly is suggested to concern with the emergence of superconductivity. These results highlight the strong electron-lattice coupling and effect of the band in this system, thus challenging the prevailing scenarios that focus on the role of iron 3d orbitals.

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Section: Analysis Based On Band Picturementioning

confidence: 99%

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

et al. 2012

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“…In the case that a large density of states of quasiparticles locates in the vicinity of E F formed by hybridization, a coupling between quasiparticles and a relevant elastic strain associated with a sound wave can be fairly strong. [6][7][8] This coupling often causes an elastic anomaly at low temperatures, so called deformation potential approximation as described by the following formula,…”

Section: Methodsmentioning

confidence: 99%

Elastic Anomalies of Single Crystalline Rh₁₇S₁₅ Associated with Structural Fluctuation

Murakami

Kudo

Nakamura

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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We have studied elastic properties by ultrasonic measurements for a single crystal of Rh 17 S 15 with the superconducting transition temperature T C = 5.4 K. A pronounced elastic softening toward the T c under zero magnetic field was observed in the temperature dependence of the shear elastic constant C E = (C 11-C 12)/2, presumably due to the high density of states of d bands at the Fermi level E F. In the T dependence under several applied magnetic fields (H), the softening is gradually suppressed and the minimum shifts to the lower temperature side with increasing the H. From the results of various T and H scans, we summarized them in the magnetic phase diagram. We discuss the elastic properties and the mechanism of the elastic softening in terms of the electronic structure of Rh 17 S 15 in the vicinity of E F .

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“…Elastic properties of CeRu ¾ have been studied by Wolf et al [33] and Suzuki et al [34] from room temperature down to 1 K. The elastic modulus (C ½½ C ½¾ )/2 continues to decrease with decreasing temperature down to 18.2 K, reaches a minimum and finally approaches a small constant value at low temperatures. Between 300 K and low temperatures the decrease in lattice stiffness for this mode is about 55%.…”

Section: Elastic Propertiesmentioning

confidence: 99%

“…Suzuki et al [34] attributed the observed behaviour to the existence of narrow electronic bands with relatively high density of states at .…”

Section: Elastic Propertiesmentioning

confidence: 99%

Interesting normal state and superconducting properties of the intermediate valence compound CeRu2

Roy

Chaddah

1999

Pramana - J Phys

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Superconductivity in CeRu¾ was discovered 40 years ago, and was extensively studied because alloying with magnetic elements showed the coexistence of superconductivity and magnetic order. The normal state of CeRu¾ has been of interest because of its intermediate valence character. The superconducting state has been studied extensively because of its paramagnetic nature and anomalous pinning properties. This review presents the present status of knowledge, and discusses the puzzling features of CeRu¾.

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Huge Lattice Softening inCeRu₂without Structural Transition

Cited by 24 publications

References 10 publications

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

Elastic Anomalies of Single Crystalline Rh₁₇S₁₅ Associated with Structural Fluctuation

Interesting normal state and superconducting properties of the intermediate valence compound CeRu2

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Huge Lattice Softening inCeRu2without Structural Transition

Cited by 24 publications

References 10 publications

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe1-xCox)2As2

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe1-xCox)2As2

Elastic Anomalies of Single Crystalline Rh17S15 Associated with Structural Fluctuation

Interesting normal state and superconducting properties of the intermediate valence compound CeRu2

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Huge Lattice Softening inCeRu₂without Structural Transition

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_1-xCo_x)₂As₂

Elastic Anomalies of Single Crystalline Rh₁₇S₁₅ Associated with Structural Fluctuation