scholarly journals Unconventional quantum vortex matter state hosts quantum oscillations in the underdoped high-temperature cuprate superconductors

2021 ◽  
Vol 118 (7) ◽  
pp. e2021216118
Author(s):  
Yu-Te Hsu ◽  
Máté Hartstein ◽  
Alexander J. Davies ◽  
Alexander J. Hickey ◽  
Mun K. Chan ◽  
...  
Keyword(s):  
Ground State ◽  
Electrical Transport ◽  
Cuprate Superconductors ◽  
Magnetic Hysteresis ◽  
Density Wave ◽  
Vortex Matter ◽  
Quantum Oscillations ◽  
Quantum Vortex ◽  
Pair Density ◽  
Millikelvin Temperatures

A central question in the underdoped cuprates pertains to the nature of the pseudogap ground state. A conventional metallic ground state of the pseudogap region has been argued to host quantum oscillations upon destruction of the superconducting order parameter by modest magnetic fields. Here, we use low applied measurement currents and millikelvin temperatures on ultrapure single crystals of underdoped YBa2Cu3O6+x to unearth an unconventional quantum vortex matter ground state characterized by vanishing electrical resistivity, magnetic hysteresis, and nonohmic electrical transport characteristics beyond the highest laboratory-accessible static fields. A model of the pseudogap ground state is now required to explain quantum oscillations that are hosted by the bulk quantum vortex matter state without experiencing sizable additional damping in the presence of a large maximum superconducting gap; possibilities include a pair density wave.

scholarly journals MAGNETIC FIELD TUNING OF CHARGE AND SPIN ORDER IN THE CUPRATE SUPERCONDUCTORS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3156-3163 ◽  
Author(s):  
A. POLKOVNIKOV ◽  
S. SACHDEV ◽  
M. VOJTA ◽  
E. DEMLER
Keyword(s):  
Magnetic Field ◽  
Ground State ◽  
Charge Density Wave ◽  
Cuprate Superconductors ◽  
Density Wave ◽  
Spin Density Wave ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Spin Order ◽  
New Information

Recent neutron scattering, nuclear magnetic resonance, and scanning tunneling microscopy experiments have yielded valuable new information on the interplay between charge and spin density wave order and superconductivity in the cuprate superconductors, by using a perpendicular magnetic field to tune the ground state properties. We compare the results of these experiments with the predictions of a theory which assumed that the ordinary superconductor was proximate to a quantum transition to a superconductor with co-existing spin/charge density wave order.

scholarly journals Hidden Pair-Density-Wave Order in Cuprate Superconductors

2019 ◽  
Vol 32 (9) ◽  
pp. 2745-2749 ◽  
Author(s):  
Shiping Feng ◽  
Deheng Gao ◽  
Yiqun Liu ◽  
Yingping Mou ◽  
Shuning Tan
Keyword(s):  
Cuprate Superconductors ◽  
Density Wave ◽  
Pair Density ◽  
Pair Density Wave

scholarly journals Ideal charge-density-wave order in the high-field state of superconducting YBCO

2016 ◽  
Vol 113 (51) ◽  
pp. 14645-14650 ◽  
Author(s):  
H. Jang ◽  
W.-S. Lee ◽  
H. Nojiri ◽  
S. Matsuzawa ◽  
H. Yasumura ◽  
...  
Keyword(s):  
Charge Density ◽  
Critical Field ◽  
Ground State ◽  
Charge Density Wave ◽  
High Field ◽  
Cuprate Superconductors ◽  
Density Wave ◽  
Quantum Oscillation ◽  
Zero Field ◽  
Correlation Volume

The existence of charge-density-wave (CDW) correlations in cuprate superconductors has now been established. However, the nature of the CDW ground state has remained uncertain because disorder and the presence of superconductivity typically limit the CDW correlation lengths to only a dozen unit cells or less. Here we explore the field-induced 3D CDW correlations in extremely pure detwinned crystals of YBa2Cu3O2(YBCO) ortho-II and ortho-VIII at magnetic fields in excess of the resistive upper critical field (Hc2) where superconductivity is heavily suppressed. We observe that the 3D CDW is unidirectional and possesses a long in-plane correlation length as well as significant correlations between neighboring CuO2planes. It is significant that we observe only a single sharply defined transition at a critical field proportional toHc2, given that the field range used in this investigation overlaps with other high-field experiments including quantum oscillation measurements. The correlation volume is at least two to three orders of magnitude larger than that of the zero-field CDW. This is by far the largest CDW correlation volume observed in any cuprate crystal and so is presumably representative of the high-field ground state of an “ideal” disorder-free cuprate.

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 The Physics of Pair-Density Waves: Cuprate Superconductors and Beyond

2020 ◽  
Vol 11 (1) ◽  
pp. 231-270 ◽  
Author(s):  
Daniel F. Agterberg ◽  
J.C. Séamus Davis ◽  
Stephen D. Edkins ◽  
Eduardo Fradkin ◽  
Dale J. Van Harlingen ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Density Wave ◽  
Cold Atom ◽  
Current Debate ◽  
Macroscopic Description ◽  
Microscopic Description ◽  
Unconventional Superconductors ◽  
Pair Density ◽  
The Status ◽  
Competing Order

We review the physics of pair-density wave (PDW) superconductors. We begin with a macroscopic description that emphasizes order induced by PDW states, such as charge-density wave, and discuss related vestigial states that emerge as a consequence of partial melting of the PDW order. We review and critically discuss the mounting experimental evidence for such PDW order in the cuprate superconductors, the status of the theoretical microscopic description of such order, and the current debate on whether the PDW is a mother order or another competing order in the cuprates. In addition, we give an overview of the weak coupling version of PDW order, Fulde–Ferrell–Larkin–Ovchinnikov states, in the context of cold atom systems, unconventional superconductors, and noncentrosymmetric and Weyl materials.

scholarly journals Fractionalized pair density wave in the pseudogap phase of cuprate superconductors

2019 ◽  
Vol 100 (22) ◽  
Author(s):  
D. Chakraborty ◽  
M. Grandadam ◽  
M. H. Hamidian ◽  
J. C. S. Davis ◽  
Y. Sidis ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Density Wave ◽  
Pseudogap Phase ◽  
Pair Density ◽  
Pair Density Wave

scholarly journals Magnetic field–induced pair density wave state in the cuprate vortex halo

Science ◽  
2019 ◽  
Vol 364 (6444) ◽  
pp. 976-980 ◽  
Author(s):  
S. D. Edkins ◽  
A. Kostin ◽  
K. Fujita ◽  
A. P. Mackenzie ◽  
H. Eisaki ◽  
...  
Keyword(s):  
Electron Pair ◽  
Density Wave ◽  
Wave State ◽  
Quantum Oscillations ◽  
Superconducting Cuprates ◽  
Pair Density ◽  
Cuprate Superconductivity ◽  
A Charge ◽  
Electron Pair Density ◽  
Pair Density Wave

High magnetic fields suppress cuprate superconductivity to reveal an unusual density wave (DW) state coexisting with unexplained quantum oscillations. Although routinely labeled a charge density wave (CDW), this DW state could actually be an electron-pair density wave (PDW). To search for evidence of a field-induced PDW, we visualized modulations in the density of electronic states N(r) within the halo surrounding Bi2Sr2CaCu2O8 vortex cores. We detected numerous phenomena predicted for a field-induced PDW, including two sets of particle-hole symmetric N(r) modulations with wave vectors QP and 2QP, with the latter decaying twice as rapidly from the core as the former. These data imply that the primary field-induced state in underdoped superconducting cuprates is a PDW, with approximately eight CuO2 unit-cell periodicity and coexisting with its secondary CDWs.

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