Pressure-induced double superconducting domes and charge instability in the kagome metal 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>KV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>

Du, Feng; Luo, Shuaishuai; Ortiz, Brenden R.; Chen, Ye; Duan, Weiyin; Zhang, Dongting; Lu, Xin; Wilson, Stephen D.; Song, Yu; Yuan, Huiqiu

doi:10.1103/physrevb.103.l220504

Cited by 152 publications

(134 citation statements)

References 32 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…Increasing pressure to 10 GPa in RbV 3 Sb 5 and 5 GPa in KV 3 Sb 5 [Figs. 4(b) and (e)], the imaginary phonons associated with the CDW disappear, which indicates the hexagonal P 6/mmm structure is stable at these pressures, consistent with the experimentally observed suppression of CDW above p c ( 2 GPa) [28][29][30]34].…”

Section: First-principles Calculations Of Phonon Spectrasupporting

confidence: 79%

“…Based on the XRD results in this work and previous resistivity measurements [30,34], the temperature-pressure phase diagrams for RbV 3 Sb 5 and KV 3 Sb 5 are constructed and shown in Fig. 5.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, this structural instability is distinct from the CDW that occurs below p c , and can be instead associated with the β-phase uncovered in our XRD measurements. It is noteworthy that while 10 GPa is sufficient to induce this structural instability in KV SC1 and SC2 correspond to the two superconducting domes revealed in transport measurements [30,34]. T c and the CDW ordering temperature T CDW for RbV 3 Sb 5 are from Ref.…”

Section: First-principles Calculations Of Phonon Spectramentioning

confidence: 99%

“…[34], and those for KV 3 Sb 5 are from Ref. [30]. The vertical dashed lines separate distinct structural phases, and are determined from the lowest pressure that the new phases are observed.…”

Section: First-principles Calculations Of Phonon Spectramentioning

confidence: 99%

“…As a clean and powerful tool that can be utilized to tailor materials' atomic distances, and thus crystal and electronic structures, pressure is widely used to tune the properties of materials. The AV 3 Sb 5 kagome metals are highly tunable by pressure or strain [27][28][29][30][31][32][33][34][35][36][37], and display complex evolution of superconductivity with pressure. Under pressure, the CDW is quickly suppressed at p c 2 GPa, forming a superconducting dome with T c maximized at p c [28][29][30]34], consistent with competing CDW and superconductivity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals

Du¹,

Li²,

Luo³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The interplay of superconductivity with electronic and structural instabilities on the kagome lattice provides a fertile ground for the emergence of unusual phenomena. The vanadium-based kagome metals AV3Sb5 (A = K, Rb, Cs) exhibit superconductivity on an almost ideal kagome lattice, with the superconducting transition temperature Tc forming two domes upon pressure-tuning. The first dome arises from the competition between superconductivity and a charge-density-wave, whereas the origin for the second dome remains unclear. Herein, we show that the appearance of the second superconducting dome in KV3Sb5 and RbV3Sb5 is associated with transitions from hexagonal P6/mmm to monoclinic P2/m structures, evidenced by splitting of structural peaks from synchrotron powder X-ray diffraction experiments and imaginary phonon frequencies in first-principles calculations. In KV3Sb5, transition to an orthorhombic Pmmm structure is further observed for pressure p≥20 GPa, and is correlated with the strong suppression of Tc in the second superconducting dome. Our findings indicate distortions of the crystal structure modulates superconductivity in AV3Sb5 under pressure, providing a platform to study the emergence of superconductivity in the presence of multiple structural instabilities.

show abstract

Section: First-principles Calculations Of Phonon Spectrasupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: First-principles Calculations Of Phonon Spectramentioning

confidence: 99%

Section: First-principles Calculations Of Phonon Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals

Du¹,

Li²,

Luo³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Modulations in Superconductors: Probes of Underlying Physics

et al. 2023

View full text Add to dashboard Cite

development of various modulations techniques, breakthroughs in quantum materials are achieved, such as the quantum anomalous Hall effect (AHE) in topological insulators, [1][2][3][4] gate-tuned roomtemperature ferromagnetism in 2D van der Waals materials, [5][6][7][8] and emergent magnetic monopoles in artificial spin ice. [9] Especially, as the quantum materials of particular interest with zero dissipation, superconductors have been intensively studied with advanced modulations, aiming to reveal a plethora of emergent phenomena in condensed matter physics, such as superconductor-to-insulator transitions (SIT), [10][11][12] intermediate bosonic metallic state, [13] Bose-Einstein condensation (BEC)-Bardeen-Cooper-Schrieffer (BCS) crossover, [14,15] and intertwined orders, [16][17][18] as well as to develop applications in quantum computing [19][20][21] and ultrasensitive detections. [22][23][24] The superconductivity composes of two ingredients, including the Cooper pairs, each formed by two electrons, and phase coherence among Cooper pairs. [25] Superconductors such as metals and alloys are in the weak-coupling regime, which is well understood by BCS theory. [26,27] However, the later discovered superconductors, including cuprates, iron-based superconductors, and heavy-fermion superconductors, are strongly correlated systems, where a widely accepted microscopic mechanism yet remains absent. Therefore, various modulations have been utilized for the ultimate understanding of these superconductors and routines for room temperature superconductivity. Traditional modulations, such as elemental substitution, annealing, and polarization-induced gating are usually accompanied by some severe problems, including discontinuity, disorders, and limited ranges. Recently, state-of-the-art techniques have been developed with improved convenience, increased capability, and unprecedented dimensionalities, enabling more thorough investigations of unconventional superconductors.As a manifestation, we take some examples discussed in this review in advance. The carrier density can be tuned more conveniently and continuously. The techniques of ionic field-effect transistor (iFET) and electric double-layer transistor (EDLT) surpass conventional methods limited by solid solubility or dielectric breakdown, which enables the more precise phase diagram and detailed scaling analysis at the quantum phaseThe importance of modulations is elevated to an unprecedented level, due to the delicate conditions required to bring out exotic phenomena in quantum materials, such as topological materials, magnetic materials, and superconductors. Recently, state-of-the-art modulation techniques in material science, such as electric-double-layer transistor, piezoelectric-based strain apparatus, angle twisting, and nanofabrication, have been utilized in superconductors. They not only efficiently increase the tuning capability to the broader ranges but also extend the tuning dimensionality to unprecedented degrees of freedom, including quantum fluctuations of...

show abstract

Electronic, optical, thermodynamic and thermoelectric properties of LiCu3Bi5 compound under strain effect

Jabar,

Benyoussef,

Bahmad

2023

Opt Quant Electron

View full text Add to dashboard Cite

Pressure-induced double superconducting domes and charge instability in the kagome metal KV3Sb5

Cited by 152 publications

References 32 publications

Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals

Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals

Modulations in Superconductors: Probes of Underlying Physics

Electronic, optical, thermodynamic and thermoelectric properties of LiCu3Bi5 compound under strain effect

Contact Info

Product

Resources

About