4.6 Editorial Material

Charge-density-wave quantum materials and devices-New developments and future prospects

Related references

Note: Only part of the references are listed.
Article Physics, Applied

Evidence for a thermally driven charge-density-wave transition in 1T-TaS2 thin-film devices: Prospects for GHz switching speed

Amirmahdi Mohammadzadeh et al.

Summary: This study reports the room-temperature switching of 1T-TaS2 thin-film charge-density-wave devices using nanosecond-duration electrical pulsing to construct their time-resolved current-voltage characteristics. The switching action is based on the charge-density-wave phase transition in the material, and self-heating of the devices is suppressed for short pulses, causing weakly non-linear current-voltage characteristics. As the pulse duration increases, hysteresis in the current develops nonmonotonically.

APPLIED PHYSICS LETTERS (2021)

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Study of charge density waves in suspended 2H-TaS2 and 2H-TaSe2 by nanomechanical resonance

Martin Lee et al.

Summary: The study investigates the CDW phase transition in suspended 2H-TaS2 and 2H-TaSe2 membranes using mechanical resonances, revealing that degradation can significantly affect transition temperatures, leading to multiple phase transitions and hysteresis in temperature.

APPLIED PHYSICS LETTERS (2021)

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Quantum fluidic charge density wave transport

John H. Miller et al.

Summary: In this study, the quantum model of charge density wave transport and its flow under different electric field strengths are discussed. The introduction of the time-correlated soliton tunneling model is compared with experiments, and the possibility of collective quantum behavior at room temperature in certain materials is explored. Potential applications in quantum information processing are also discussed.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Light-induced reorganization of charge density wave stacking in 1T-TaS2

Weijian Li et al.

Summary: Light can change the way CDW domains stack in 1T-TaS2 and affect its optical properties, but the mechanism of light-induced stacking reorganization is not fully understood. Research shows that optical tunability peaks at 250K due to the conflicting effects of larger domains at lower temperatures and less favorable stacking reorganization energetics.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Charge-order dynamics in underdoped La1.6-xNd0.4SrxCuO4 revealed by electric pulses

Bal K. Pokharel et al.

Summary: The dynamics of charge-order domains in a stripe-ordered cuprate were investigated using pulsed current injection, revealing access to nonthermally induced resistive metastable states. Fluctuations of charge order were found to be most pronounced at the onset temperature. This study establishes pulsed current injection as a viable method for probing charge-order dynamics in various materials.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Ultrafast spot-profile LEED of a charge-density wave phase transition

G. Storeck et al.

Summary: The researchers investigated the optically driven phase transition between two charge-density wave (CDW) states at the surface of tantalum disulfide (1T-TaS2) using an improved ultrafast low-energy electron diffraction setup. The experimental results showed that there was a substantial IC-peak broadening for very short time scales followed by a prolonged spot narrowing.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Distinctive features of the charge density wave collective motion driven by Hall electric field in NbSe3

A. Frolov et al.

Summary: A comparative study of CDW sliding in NbSe3 at low temperatures was conducted, comparing two configurations. It was found that the threshold electric field for CDW depinning is sharp, measuring down to 0.1 mK. Below 4.2 K, the threshold electric field becomes temperature-independent, indicating a crossover from thermal fluctuations to a tunneling mechanism for CDW depinning.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Non-equilibrium charge density wave ground state of quasi-two-dimensional rare-earth tritelluride TbTe3

A. Frolov et al.

Summary: The study found that in TbTe3, the equilibrium ground state of CDW cooled to a given temperature T-exp under an electric field depends on the strength of the electric field. When cooled with an electric field below the critical value E-t, it is in a single-phase state, and when cooled with an electric field higher than E-t, it is in a frozen glass state. This suggests an interaction between CDW and a well-ordered Te-Te discommensuration network.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

First-principles study of the Kohn anomaly in TaTe4

Fei-Hu Liu et al.

Summary: TaTe4 is known as a CDW system with a commensurately modulated structure at room temperature. The giant Kohn anomaly in TaTe4 at room temperature is driven by a large electron-phonon coupling coefficient at the CDW vector, and can be effectively suppressed by applying hydrostatic pressure. The disappearance of CDW instability after pressure suggests that the anomaly is not caused by Fermi surface nesting.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

RF wave mixing with sliding charge-density waves

S. A. Nikonov et al.

Summary: The study reveals that in quasi one-dimensional charge-density wave conductors, I-V curves exhibit a relationship between hosts and satellites under the influence of different frequency RF voltages, with oscillations in width as a function of RF amplitude. Each satellite can be treated as a conventional Shapiro step, if its host Shapiro step is taken as a reference point.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Stress-controlled n-p conductivity switch based on intercalated ZrTe2

Natalia Morozova et al.

Summary: The study shows that the electrical conductivity type of ZrTe2 crystals can be controlled by applying different pressures, toggling between n-type, p-type, and even metallization. This control offers a potential method for diversifying the applications of conductivity in next-generation nanoelectronic devices.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Prediction of the effects of rf irradiation on the I-V curves of a CDW compound

S. A. Nikonov et al.

Summary: The text discusses the development of Shapiro steps in sliding charge-density waves under rf irradiation, and demonstrates how the positions and magnitudes of ShSs can be predicted using the velocity and voltage of CDW. The only necessary information in advance is the I-V characteristics and the cross-sectional area of the sample.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Observation of a topological defect lattice in the charge density wave of 1T-TaS2

Michael A. Altvater et al.

Summary: The graphene cover layer effectively protects 1T-TaS2 from oxidation while allowing access to the electronic properties of the CDW. At room temperature, contiguous domains of the CDW phase and a lattice of CDW vortices with quasi-long range translational order are observed. The graphene cover layer acquires properties consistent with a proximity-induced CDW when the temperature is reduced to 78 K.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Room temperature depinning of the charge-density waves in quasi-two-dimensional 1T-TaS2 devices

A. Mohammadzadeh et al.

Summary: This study focuses on the depinning of nearly commensurate charge-density waves in 1T-TaS2 thin films at room temperature. The depinning process in 1T-TaS2 does not show a noticeable increase in electric current, unlike conventional charge-density-wave materials with quasi-1D crystal structure. The results suggest important implications for potential applications of charge-density wave devices in electronics.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Ultrafast non-thermal and thermal switching in charge configuration memory devices based on 1T-TaS2

D. Mihailovic et al.

Summary: CCM devices operate by controllable reconfiguration of electronic domains in charge-density-wave materials, allowing for sub-picosecond switching speed and low energy consumption. The mechanisms involved in switching between domain states of different electrical resistances are complex, involving trapping non-equilibrium charges within topologically protected domain states. The asymmetry between non-thermal write processes and thermal erase processes is a key aspect to consider in understanding the operation of CCM devices.

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Article Physics, Applied

Collective states and charge density waves in the group IV transition metal trichalcogenides

M. D. Randle et al.

Summary: CDW was first suggested by Peierls to describe concepts related to electron-phonon or electron-electron interactions in condensed matter physics. Recent studies have shown that semiconducting systems like TiS3 may exhibit behavior related to CDWs, with the exact origin of this behavior requiring further measurements for proper characterization.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Chiral charge density waves induced by Ti-doping in 1T-TaS2

J. J. Gao et al.

Summary: The study found that Ti doping in 1T-TaS2 led to an unexpected chiral CDW phase, possibly due to doping-enhanced orbital order, and only when x=0.08, the possible long-range orbital order may trigger the chiral CDW phase. Compared with other 3d-elements doped 1T-TaS2, Ti doping retained the electronic flatband and corresponding CDW phase, which is necessary for the emergence of chirality.

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Article Physics, Applied

Mechanically induced Shapiro steps: Enormous effect of vibrations on the charge-density wave transport

M. V. Nikitin et al.

Summary: The study focuses on CDW transport in the whiskers of orthorhombic TaS3 suspended between piezoelectric actuators. It is observed that when the frequency of rf voltage applied coincides with a vibration resonance of the whisker, I-V curves exhibit Shapiro-step-like features, indicating a strong influence of vibrations on CDW periodicity. Time-dependent strain from vibrations results in periodic stops of CDW, suggesting electromechanical effects inherent to sliding CDWs.

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