scholarly journals Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
F. H. Yu ◽  
D. H. Ma ◽  
W. Z. Zhuo ◽  
S. Q. Liu ◽  
X. K. Wen ◽  
...  
Keyword(s):  
Charge Density ◽  
Electrical Transport ◽  
Charge Density Wave ◽  
Condensed Matter ◽  
Density Wave ◽  
Residual Resistivity ◽  
Double Peak ◽  
Wave State ◽  
Quantum Oscillations ◽  
Nontrivial Topology

AbstractUnderstanding the competition between superconductivity and other ordered states (such as antiferromagnetic or charge-density-wave (CDW) state) is a central issue in condensed matter physics. The recently discovered layered kagome metal AV3Sb5 (A = K, Rb, and Cs) provides us a new playground to study the interplay of superconductivity and CDW state by involving nontrivial topology of band structures. Here, we conduct high-pressure electrical transport and magnetic susceptibility measurements to study CsV3Sb5 with the highest Tc of 2.7 K in AV3Sb5 family. While the CDW transition is monotonically suppressed by pressure, superconductivity is enhanced with increasing pressure up to P1 ≈ 0.7 GPa, then an unexpected suppression on superconductivity happens until pressure around 1.1 GPa, after that, Tc is enhanced with increasing pressure again. The CDW is completely suppressed at a critical pressure P2 ≈ 2 GPa together with a maximum Tc of about 8 K. In contrast to a common dome-like behavior, the pressure-dependent Tc shows an unexpected double-peak behavior. The unusual suppression of Tc at P1 is concomitant with the rapidly damping of quantum oscillations, sudden enhancement of the residual resistivity and rapid decrease of magnetoresistance. Our discoveries indicate an unusual competition between superconductivity and CDW state in pressurized kagome lattice.

scholarly journals Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal

2021 ◽  
Author(s):  
Fanghang Yu ◽  
Donghui Ma ◽  
Weizhuang Zhuo ◽  
Shiqiu Liu ◽  
Xikai Wen ◽  
...  
Keyword(s):  
Charge Density ◽  
Electrical Transport ◽  
Charge Density Wave ◽  
Condensed Matter ◽  
Density Wave ◽  
Residual Resistivity ◽  
Quantum Oscillation ◽  
Wave State ◽  
Lifshitz Transition ◽  
Nontrivial Topology

Abstract Understanding the competition between superconductivity and other ordered states (such as antiferromagnetic or charge-density-wave (CDW) state) is a central issue in condensed matter physics. The recently discovered layered kagome metal AV3Sb5 (A = K, Rb, and Cs) provides us a new playground to study the interplay of superconductivity and CDW state by involving nontrivial topology of band structures. Here, we present high-pressure electrical transport measurements for CsV3Sb5 with the highest Tc of 2.7 K in AV3Sb5 family. The CDW transition is monotonically suppressed by pressure, while superconductivity is enhanced with increasing pressure up to P1 ≈0.7 GPa, then an unexpected suppression on superconductivity happens until pressure around 1.2 GPa. The CDW is completely suppressed at a critical pressure P2≈2 GPa together with a maximum Tc of about 8 K. In contrast to a common dome-like behavior, the pressure-dependent Tc shows an unexpected double-peak behavior. The unusual suppression of Tc at P1 is linked to a Lifshitz transition of Fermi surface evidenced by quantum oscillation experiment, a sudden enhancement of the residual resistivity and a rapid decrease of magnetoresistance. A possible nearly commensurate CDW state involving the formation of CDW domain wall has been used to account for the Lifshitz transition. Our discoveries indicate an unusual competition between superconductivity and CDW state in pressurized kagome lattice.

Non-ohmic electrical transport in the charge-density wave state of (2,5(OCH3)2DCNQI)2Li

1999 ◽  
Vol 103 (1-3) ◽  
pp. 2185-2186 ◽  
Author(s):  
M. Pinterić ◽  
N. Biškup ◽  
S. Tomić ◽  
J.U. von Schütz
Keyword(s):  
Charge Density ◽  
Electrical Transport ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave State

scholarly journals Magnetic quantum oscillations in the charge-density-wave state of the organic metals α-(BEDT-TTF)2MHg(SCN)4with M = K and Tl

2014 ◽  
Vol 40 (4) ◽  
pp. 377-383 ◽  
Author(s):  
M. V. Kartsovnik ◽  
V. N. Zverev ◽  
D. Andres ◽  
W. Biberacher ◽  
T. Helm ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave State ◽  
Quantum Oscillations ◽  
Organic Metals ◽  
Magnetic Quantum Oscillations

Reconstruction of the Charge Density Wave State Under the Applied Electric Field

2012 ◽  
Vol 25 (5) ◽  
pp. 1323-1327 ◽  
Author(s):  
Tianyou Yi ◽  
Yulang Luo ◽  
Alvaro Rojo-Bravo ◽  
Natacha Kirova ◽  
Serguei Brazovskii
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Applied Electric Field ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave State

Focused-ion-beam fabricated charge density wave devices

2002 ◽  
Vol 12 (9) ◽  
pp. 103-108
Author(s):  
E. Slot ◽  
H. S.J. van der Zant
Keyword(s):  
Charge Density ◽  
Electrical Transport ◽  
Charge Density Wave ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Density Wave ◽  
Finite Size ◽  
Mode Locking ◽  
Crystal Properties ◽  
Geometrical Effects

We have fabricated a variety of Charge-Density-Wave (CDW) devices using a focused-ion-beam (FIB) process. The FIB is used to etch any desired geometry in crystals, like constrictions, tears, trenches, zigzag patterns etcetera. We have studied the electrical transport of these devices. This study includes: finite size effects (e.g. dependence of the threshold for CDW sliding on the width while maintaining the same thickness of samples), conduction perpendicular to the chains, geometrical effects and CDW junctions. We have found complete mode-locking on CDW constrictions, indicating that the high-quality crystal properties are preserved after FIB processing. This makes the process a useful technique to study submicron CDW dynamics.

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