Decompression‐Driven Superconductivity Enhancement in In<sub>2</sub>Se<sub>3</sub>

Ke, Feng; Dong, Hongbin; Chen, Yabin; Zhang, Jianbo; Liu, Cailong; Zhang, Junkai; Gan, Yuan; Han, Yonghao; Chen, Zhiqiang; Wen, Jinsheng; Yang, Wenge; Chen, Xiao‐Jia; Struzhkin, Viktor V.; Mao, Ho‐kwang; Chen, Bin

doi:10.1002/adma.201701983

Cited by 41 publications

(35 citation statements)

References 40 publications

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“…Interestingly, the superconducting volume fraction is about the same as compression data, however, the T c values are not fully recovered. The different T c between compression and decompression is previously reported in In 2 Se 3 , which is intrinsic, as a result of changes in phonon and variation of carrier concentration combined in the pressure quench [32]. Further measurements are needed to confirm if there is indeed a suppressed T c behavior in Ba(Fe 1−x Co x ) 2 As 2 during decompression, which is beyond the scope of this work.…”

Section: Resultsmentioning

confidence: 60%

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
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Bud'ko, Sergey L.; Canfield, Paul C.; Panagopoulos, C.; Li, P. G.; Mu, G.; Hu, T.; Almasan, C. C.; and Xiao, H., "Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary" (2018). Ames Laboratory Accepted Manuscripts. 172. https://lib.dr.iastate.edu/ameslab_manuscripts/172Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2 near the antiferromagnetic boundary AbstractSuperconductivity in iron pnictides is unconventional and pairing may be mediated by magnetic fluctuations in the Fe sublattice. Pressure is a clean method to explore superconductivity in iron based superconductors by tuning the ground state continuously without introducing disorder. Here we present a systematic high pressure transport study in Ba ( Fe 1 − x Co x ) 2 As 2 single crystals with x = 0.057, which is near the antiferromagnetic instability. Resistivity ρ = ρ 0 + A T n was studied under applied pressure up to 7.90 GPa. The parameter n approaches a minimum value of n ≈ 1 at a critical pressure P c = 3.65 GPa. Near P c , the superconducting transition temperature T c reaches a maximum value of 25.8 K. In addition, the superconducting diamagnetism at 2 K shows a sudden change around the same critical pressure. These results may be associated with a possible quantum critical point hidden inside the superconducting dome, near optimum T c . DisciplinesCondensed Matter Physics | Physics Superconductivity in iron pnictides is unconventional and pairing may be mediated by magnetic fluctuations in the Fe sublattice. Pressure is a clean method to explore superconductivity in iron based superconductors by tuning the ground state continuously without introducing disorder. Here we present a systematic high pressure transport study in Ba(Fe 1−x Co x ) 2 As 2 single crystals with x = 0.057, which is near the antiferromagnetic instability. Resistivity ρ = ρ 0 + AT n was studied under applied pressure up to 7.90 GPa. The parameter n approaches a minimum value of n ≈ 1 at a critical pressure P c = 3.65 GPa. Near P c , the superconducting transition temperature T c reaches a maximum value of 25.8 K. In addition, the superconducting diamagnetism at 2 K shows a sudden change around the same critical pressure. These results may be associated with a possible quantum critical point hidden inside the superconducting dome, near optimum T c .

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Section: Resultsmentioning

confidence: 60%

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
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“…40 More recently, a HP study has revealed a superconductivity enhancement in α-In2Se3 under compression when it undergoes the transition to the defective cubic Th3P4 structure. 44 Finally, a recent HP study has also reported the transition from γ-In2Se3 to β-In2Se3 under compression. 45 In order to shed light into: i) the nature of the α(R) phase; ii) the existence of an intermediate β´ phase between α and β phases; and iii) the presence of a soft phonon in the β phase, we performed ab initio calculations of In2Se3 with R3m, C2/m and R-3m structures.…”

Section: Introductionmentioning

confidence: 96%

Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

et al. 2018

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α(R)-InSe has been experimentally and theoretically studied under compression at room temperature by means of X-ray diffraction and Raman scattering measurements as well as by ab initio total-energy and lattice-dynamics calculations. Our study has confirmed the α ( R3 m) → β' ( C2/ m) → β ( R3̅ m) sequence of pressure-induced phase transitions and has allowed us to understand the mechanism of the monoclinic C2/ m to rhombohedral R3̅ m phase transition. The monoclinic C2/ m phase enhances its symmetry gradually until a complete transformation to the rhombohedral R3̅ m structure is attained above 10-12 GPa. The second-order character of this transition is the reason for the discordance in previous measurements. The comparison of Raman measurements and lattice-dynamics calculations has allowed us to tentatively assign most of the Raman-active modes of the three phases. The comparison of experimental results and simulations has helped to distinguish between the different phases of InSe and resolve current controversies.

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“…[ 26,27 ] Furthermore, superconductivity was reported in β‐In 2 Se 3 under high pressure due to phonon softening. [ 28 ]…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Picosecond Ultrasonic Probing of Intralayer and van der Waals Interlayer Bonding in α‐ and β‐In₂Se₃

Akimov

Page

et al. 2021

Adv Funct Materials

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The interplay between the strong intralayer covalent-ionic bonds and the weak interlayer van der Waals (vdW) forces between the neighboring layers of vdW crystals gives rise to unique physical and chemical properties. Here, the intralayer and interlayer bondings in α and β polytypes of In 2 Se 3 are studied, a vdW material with potential applications in advanced electronic and optical devices. Picosecond ultrasonic experiments are conducted to probe the sound velocity in the direction perpendicular to the vdW layers. The measured sound velocities are different in αand β-In 2 Se 3 , suggesting a significant difference in their elastic properties. Density functional theory and an effective spring model are used to calculate the elastic stiffness of the layer and vdW gap in αand β-In 2 Se 3 . The calculated elastic moduli show good agreement with experimental values and reveal the dominant contribution of interlayer atomic bonding to the different elastic properties of the two polytypes. The findings show the power of picosecond ultrasonics for probing the fundamental elastic properties of vdW materials. The data and analysis also provide a reliable description of the intra-and interlayer forces in complex crystal structures, such as the polytype phases of In 2 Se 3 .

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Decompression‐Driven Superconductivity Enhancement in In₂Se₃

Cited by 41 publications

References 40 publications

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
View full text Add to dashboard Cite

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
View full text Add to dashboard Cite

Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

Nondestructive Picosecond Ultrasonic Probing of Intralayer and van der Waals Interlayer Bonding in α‐ and β‐In₂Se₃

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Decompression‐Driven Superconductivity Enhancement in In2Se3

Cited by 41 publications

References 40 publications

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2Liu1, Wu2, Li3 et al. 2018Phys. Rev. B5120View full textAdd to dashboardCite

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2Liu1, Wu2, Li3 et al. 2018Phys. Rev. B5120View full textAdd to dashboardCite

Experimental and Theoretical Studies on α-In2Se3 at High Pressure

Nondestructive Picosecond Ultrasonic Probing of Intralayer and van der Waals Interlayer Bonding in α‐ and β‐In2Se3

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Decompression‐Driven Superconductivity Enhancement in In₂Se₃

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
View full text Add to dashboard Cite

Pressure-tuned superconductivity and normal-state behavior in Ba(Fe0.943Co0.057)2As2
Liu
¹
,
Wu
²
,
Li
³

et al. 2018
Phys. Rev. B
5
1
2
0
View full text Add to dashboard Cite

Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

Nondestructive Picosecond Ultrasonic Probing of Intralayer and van der Waals Interlayer Bonding in α‐ and β‐In₂Se₃