Observation of superconductivity and anomalous electrical resistivity in single-crystal Ir<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>Te<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>8</mml:mn></mml:msub></mml:math>

Li, L.; Qi, Tongfei; Lin, Le; Wu, Xin‐Tao; Zhang, X. T.; Butrouna, K.; Cao, V. S.; Zhang, Y. H.; Hu, Jiangping; Yuan, Shujuan; Schlottmann, P.; Long, L. E. De; Cao, G.

doi:10.1103/physrevb.87.174510

Cited by 9 publications

(12 citation statements)

References 39 publications

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“…( d ) and ( e ) display the low-temperature resistivity curves recorded under the same conditions as in ( a ) and ( b ). ( f ) Comparable resistivity curves of the stoichiometric compounds IrTe 2 and Ir 3 Te 8 adapted from refs 39 , 49 . Dashed lines in ( d )–( f ) are guides to the eye only.…”

Section: Resultsmentioning

confidence: 99%

Charge-Stripe Order and Superconductivity in Ir1−xPtxTe2

Ivashko

Yang

Destraz

et al. 2017

Sci Rep

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A combined resistivity and hard x-ray diffraction study of superconductivity and charge ordering in Ir Ir1−xPtxTe2, as a function of Pt substitution and externally applied hydrostatic pressure, is presented. Experiments are focused on samples near the critical composition x c ~ 0.045 where competition and switching between charge order and superconductivity is established. We show that charge order as a function of pressure in Ir0.95Pt0.05Te2 is preempted — and hence triggered — by a structural transition. Charge ordering appears uniaxially along the short crystallographic (1, 0, 1) domain axis with a (1/5, 0, 1/5) modulation. Based on these results we draw a charge-order phase diagram and discuss the relation between stripe ordering and superconductivity.

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Section: Resultsmentioning

confidence: 99%

Charge-Stripe Order and Superconductivity in Ir1−xPtxTe2

Ivashko

Yang

Destraz

et al. 2017

Sci Rep

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“…Initial reports focused on structural details, as all of these compounds contain anion-anion bonding, and IrS 2 , IrSe 2 , and IrTe 2 can form three different structure types. [17][18][19][20] More recent investigations have been on superconductivity in both the pyrite-type Ir x Te 2 (x = 0.75) 21 and doped CdI 2type Ir 1-x M x Te 2 (M = Pd or Pt) [22][23][24][25] . Though these studies are comprehensive, none have yet thoroughly looked at the possible stoichiometries of ternary iridium chalcogenides.…”

Section: Introductionmentioning

confidence: 99%

Anion–Anion Bonding and Topology in Ternary Iridium Seleno–Stannides

2015

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The synthesis and physical properties of two new and one known Ir-Sn-Se compound are reported. Their crystal structures are elucidated with transmission electron microscopy and powder X-ray diffraction. IrSn0.45Se1.55 is a pyrite phase which consists of tilted corner-sharing IrX6 octahedra with randomly distributed (Sn-Se)(4-) and (Se-Se)(2-) dimers. Ir2Sn3Se3 is a known trigonally distorted skutterudite that consists of cooperatively tilted corner-sharing IrSn3Se3 octahedra with ordered (Sn-Se)2(4-) tetramers. Ir2SnSe5 is a layered, distorted β-MnO2 (pyrolusite) structure consisting of a double IrSe6 octrahedral row, corner sharing in the a direction and edge sharing in the b direction. This distorted pyrolusite contains (Se-Se)(2-) dimers and Se(2-) anions, and each double row is "capped" with a (Sn-Se)n polymeric chain. Resistivity, specific heat, and magnetization measurements show that all three have insulating and diamagnetic behavior, indicative of low-spin 5d(6) Ir(3+). Electronic structure calculations on Ir2Sn3Se3 show a single, spherical, nonspin-orbit split valence band and suggest that Ir2Sn3Se3 is topologically nontrivial under tensile strain due to inversion of Ir-d and Se-p states.

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“…The competitive nature of the interplay between SC and 1/5-dimer phase is also manifested in the following observations. Bulk superconductivity occurs without the presence of this phase in structural polymorphs of IrTe 2 other than trigonal, that have IrTe 6 connectivity different than edge-sharing [78][79][80][81]. Apart from the character of the structural phase, significant depletion of the carrier density [82] accompanying the 1/5-ordering has been recently suggested as one of the contributing factors to the suppression of superconductivity.…”

Section: Resultsmentioning

confidence: 99%

Phase separation at the dimer-superconductor transition in Ir1−xRhxTe2

Banerjee

Lei

et al. 2018

Phys. Rev. B

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The detailed evolution of the local atomic structure across the (x, T) phase diagram of transition metal dichalcogenide superconductor Ir1−xRhxTe2 (0≤x≤0.3, 10 K≤T≤300 K) is obtained from high quality x-ray diffraction data using the atomic pair distribution function (PDF) method. Observed hysteretic thermal structural phase transition from trigonal (P3m1) to triclinic (P1) dimer phase for low Rh content emphasizes intimate connection between the lattice and electronic properties. For superconducting samples away from the dimer/superconductor phase boundary structural transition is absent and the local structure remains trigonal down to 10 K. In the narrow range of compositions close to the boundary PDF analysis reveals structural phase separation, suggestive of weak first order character of the Rh-doping induced dimer-superconductor quantum phase transition. Samples from this narrow range show weak anomalies in electronic transport and magnetization, hallmarks of the dimer phase, as well as superconductivity albeit with incomplete diamagnetic screening. Results suggest that the dimer and superconducting orders exist in the mutually exclusive spatial regions.

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Observation of superconductivity and anomalous electrical resistivity in single-crystal Ir3Te8

Cited by 9 publications

References 39 publications

Charge-Stripe Order and Superconductivity in Ir1−xPtxTe2

Charge-Stripe Order and Superconductivity in Ir1−xPtxTe2

Anion–Anion Bonding and Topology in Ternary Iridium Seleno–Stannides

Phase separation at the dimer-superconductor transition in Ir1−xRhxTe2

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