Competition between charge-density-wave and superconductivity in the kagome metal 
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Wang, N. N.; Chen, K. Y.; Yin, Qiangwei; N., Y. N.; Pan, Baishen; Yang, Xiaofan; Ji, Xiaoxu; Wu, Siqi; Shan, Pengfei; Xu, Shuxiang; Tu, Zhijun; Gong, Chunsheng; Liu, G. T.; Li, G.; Uwatoko, Yoshiya; Dong, Xianlin; Lei, Hechang; Sun, J. P.; Cheng, Jinguang

doi:10.1103/physrevresearch.3.043018

Cited by 68 publications

(19 citation statements)

References 61 publications

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“…At 1 GPa, these two transitions become indistinguishable and above 1 GPa we see only transition at T * 2 , which decreases upon further increasing the pressure. Extended Data Figure 6f shows the pressure evolution of T * 1 and T * 2 , extracted from µSR results, and of previously reported charge order temperature Tco,1 [35]. The value of Tco,2 [19] at ambient pressure is also shown.…”

Section: Magnetization Measurements Of Rbv3sb5mentioning

confidence: 89%

“…As the pressure is increased, not only T c (as determined from eff and charge order temperature Tco (Ref. [35]) for RbV3Sb5 (c) and KV3Sb5 (Ref. [36]) (d).…”

Section: B Superfluid Density As a Function Of Pressurementioning

confidence: 99%

“…As expected, the gap minimum vanishes continuously across the nodeless to nodal transition. [19], [35], [36]) and the onset temperatures of the time-reversal symmetry-breaking T * 1 , T * 2 as a function of pressure.…”

Section: Macroscopic Superconducting Properties Under Pressurementioning

confidence: 99%

“…Similarly to charge order, superconductivity, with transition temperature T c ∼ 1 K at ambient pressure, was also reported to display intriguing features, such as multiple gaps in (K,Cs)V 3 Sb 5 [31][32][33], diminished superfluid density in KV 3 Sb 5 [24], and double-dome structures in the pressure phase diagrams of all three compounds [34][35][36]. However, no consensus on the superconducting gap structure has been reached yet [24,[31][32][33][37][38][39][40], partly due to the challenges of performing spectroscopic studies under extreme conditions including ultra low temperatures and large pressures.…”

mentioning

confidence: 97%

“…Moreover, the role of the unconventional charge order in the emergence of these unusual superconducting features remains unclear, since the former onsets at a much higher temperature than the latter. In this regard, the sensitivity of both T c and T co on applied pressure [34][35][36] offers a rare setting to study the interplay between these two orders with a disorder-free tuning knob.…”

mentioning

confidence: 99%

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Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Guguchia¹,

Mielke²,

Das³

et al. 2022

Preprint

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Section: Magnetization Measurements Of Rbv3sb5mentioning

confidence: 89%

“…As the pressure is increased, not only T c (as determined from eff and charge order temperature Tco (Ref. [35]) for RbV3Sb5 (c) and KV3Sb5 (Ref. [36]) (d).…”

Section: B Superfluid Density As a Function Of Pressurementioning

confidence: 99%

Section: Macroscopic Superconducting Properties Under Pressurementioning

confidence: 99%

mentioning

confidence: 97%

mentioning

confidence: 99%

See 3 more Smart Citations

Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Guguchia¹,

Mielke²,

Das³

et al. 2022

Preprint

Self Cite

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Modulations in Superconductors: Probes of Underlying Physics

et al. 2023

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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...

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Surface Phonons and Possible Structural Phase Transition in a Topological Semimetal PbTaSe₂

Kumar,

Kumar

2024

Annalen der Physik

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Topological insulators are characterized by protected gapless surface or edge states but insulating bulk states which is due to the presence of spin‐orbit interactions and time‐reversal symmetry. Here, an in‐depth investigation of a topological nodal line semimetal PbTaSe2 via temperature, polarization dependent Raman spectroscopy, and temperature dependent single crystal X‐ray diffraction (SC‐XRD) measurements is reported. The analysis shows signature of electron‐phonon coupling as reflected in the Fano asymmetry in line shape of M1‐M4 modes and anomalous temperature variation of line‐width of P3‐P4 modes. Further polarization dependent phonon symmetry changes at different temperature (6K and 300K), discontinuities in bulk phonon dynamics for P2‐P5 modes, and disappearance of phonon modes, i.e., M1‐M5, on decreasing temperature indicates toward a thermally induced structural phase transition which is also supported by the SC‐XRD results. Hence based on the findings, it is proposed that M1‐M4 modes are surface phonon modes, the material undergoes a thermally induced structural phase transition from α to β phase at Tα→β ≈ 150 K or is in close proximity to the β phase and another transition below TCDW+β ≈ 100K which is possibly due to the interplay of remanent completely commensurate charge density wave (CCDW) of 1H‐TaSe2 and β phase.

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Competition between charge-density-wave and superconductivity in the kagome metal RbV3Sb5

Cited by 68 publications

References 61 publications

Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Modulations in Superconductors: Probes of Underlying Physics

Surface Phonons and Possible Structural Phase Transition in a Topological Semimetal PbTaSe₂

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Competition between charge-density-wave and superconductivity in the kagome metal RbV3Sb5

Cited by 68 publications

References 61 publications

Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Tunable nodal kagome superconductivity in charge ordered RbV3Sb5

Modulations in Superconductors: Probes of Underlying Physics

Surface Phonons and Possible Structural Phase Transition in a Topological Semimetal PbTaSe2

Contact Info

Product

Resources

About

Surface Phonons and Possible Structural Phase Transition in a Topological Semimetal PbTaSe₂