Superconductivity at 32 K in single-crystalline Rb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Se<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display=

Wang, A. F.; Ying, Jianjun; Yan, Yiqing; Liu, R. H.; Luo, X. G.; Li, Z. Y.; Wang, X. F.; Zhang, M.; Ye, G. J.; Cheng, Peng; Xiang, Ziji; Chen, X. H.

doi:10.1103/physrevb.83.060512

Cited by 306 publications

(148 citation statements)

References 26 publications

Supporting

Mentioning

143

Contrasting

Unclassified

Order By: Relevance

“…The discovery of superconductivity in iron arsenides 5 in 2008, and shortly after in β-FeSe 6 and its intercalated derivatives, 7,8,9 marked the beginning of the 'iron age' of superconductivity. β-FeSe itself crystallizes in a relatively simple tetragonal PbO-type structure (P4/nmm space group, Fig.…”

Section: Introductionmentioning

confidence: 99%

Complex biphase nature of the superconducting dome of the FeSe phase diagram

et al. 2017

View full text Add to dashboard Cite

Single crystal synchrotron X-ray diffraction as a function of temperature and pressure has revealed a complex biphase mixture in superconducting FeSe. Based on our experimental results we construct a phase diagram where structural behavior and superconducting properties of FeSe are found to be correlated. We show that below 6 GPa, where pressure promotes the superconducting critical temperature, the FeSe structure is composed of 2D layers of edge-shared FeSe4 tetrahedra, while above 6 GPa the superconductivity is strongly suppressed on formation of a new orthorhombic polymorph characterized by a 3D network of face sharing FeSe6 octahedra. Therefore changes in topology and connectivity of the FeSe structure are found to be detrimental for superconductivity to exist. This previously controversial crystal structure of the high pressure polymorph of FeSe was also unambiguously determined. High pressure FeSe adopts an orthorhombic MnP-type structure (Pnma) which corresponds to a slightly distorted hexagonal NiAs-type arrangement (P63/mmc). The structural transformation from the low-to high-pressure FeSe polymorph is first order in nature and is manifested as antiparallel displacements within the Fe and Se sublattices.

show abstract

Section: Introductionmentioning

confidence: 99%

Complex biphase nature of the superconducting dome of the FeSe phase diagram

et al. 2017

View full text Add to dashboard Cite

show abstract

“…K x Fe 2−y Se 2 single crystals were synthesized by self-flux method as described elsewhere in detail [32]. The samples show flat shiny surfaces with black color, and their element compositions were determined through energy-dispersive Xray (EDX) analysis as K 0.75 Fe 1.69 Se 2 .…”

Section: Methodsmentioning

confidence: 99%

The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor K x Fe2−y Se2

Chen

et al. 2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

“…Since its discovery in 2009, the origin of superconductivity in the family of layered Fe-based A x Fe 2-y Se 2 (A -alkali metals) superconductors [1][2][3] remains unexplained. Furthermore, these compounds exhibit a complex structural behavior.…”

Section: Introductionmentioning

confidence: 99%

Compressibility and pressure-induced disorder in superconducting phase-separatedCs0.72Fe1.57Se
Svitlyk¹,
Chernyshov²,
Bosak³
et al. 2014
Phys. Rev. B
11
2
21
0
View full text Add to dashboard Cite

Pressure-dependent diffraction response of the superconducting phase separated Cs 0.72 Fe 1.57 Se 2 has been studied using synchrotron radiation up to the pressure of 19 GPa. The main and secondary phases of Cs 0.72 Fe 1.57 Se 2 have been observed in the whole pressure range. The main ordered phase has been found to undergo an order-disorder transition in the Fe-sublattice at least at P = 11 GPa with the corresponding kinetics on the order of hours. Contrary to the analogous temperature induced transition, the secondary phase has not been suppressed suggesting that its stability pressure range is higher than 19 GPa or the corresponding transformation kinetics is slower at room temperature. Together with the previously reported pressure-dependent resistivity and magnetic susceptibility measurements, this work indicates that superconductivity in the A x Fe 2-y Se 2 (A -alkali metals) phases could be related to the Fe-vacancy ordering in the main phase.

show abstract

Superconductivity at 32 K in single-crystalline RbxFe2−ySe

Cited by 306 publications

References 26 publications

Complex biphase nature of the superconducting dome of the FeSe phase diagram

Complex biphase nature of the superconducting dome of the FeSe phase diagram

The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor K x Fe2−y Se2

Compressibility and pressure-induced disorder in superconducting phase-separatedCs0.72Fe1.57Se
Svitlyk¹,
Chernyshov²,
Bosak³
et al. 2014
Phys. Rev. B
11
2
21
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Superconductivity at 32 K in single-crystalline RbxFe2−ySe

Cited by 306 publications

References 26 publications

Complex biphase nature of the superconducting dome of the FeSe phase diagram

Complex biphase nature of the superconducting dome of the FeSe phase diagram

The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor K x Fe2−y Se2

Compressibility and pressure-induced disorder in superconducting phase-separatedCs0.72Fe1.57SeSvitlyk1, Chernyshov2, Bosak3 et al. 2014Phys. Rev. B112210View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Compressibility and pressure-induced disorder in superconducting phase-separatedCs0.72Fe1.57Se
Svitlyk¹,
Chernyshov²,
Bosak³
et al. 2014
Phys. Rev. B
11
2
21
0
View full text Add to dashboard Cite