Quantum Pairing Time Orders

Balatsky, Alexander V.; Sukhachov, P. O.; Bandyopadhyay, Sumanta

doi:10.1002/andp.201900529

Cited by 4 publications

(5 citation statements)

References 18 publications

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“…The triplet nature of the proposed light-induced dynamical correlations provides an additional advantage opening a perspective of photon-magnon coupling mediated by the triplet correlations. The proposed effect extends the possibilities of generating and controlling nonequilibrium states of matter which have attracted significant attention recently, such as Floquet topological insulators [18], oddfrequency superconductivity [19], time crystals [20][21][22], driven Dirac materials [23][24][25], light-induced and lightmanipulated superconductivity [26][27][28][29][30][31][32], vortex states [33,34], cavity-enhanced ferroelectric phase transition [35] and dynamical hidden orders [36][37][38][39].…”

mentioning

confidence: 84%

Dynamic Spin-Triplet Order Induced by Alternating Electric Fields in Superconductor-Ferromagnet-Superconductor Josephson Junctions

2021

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Dynamic states offer extended possibilities to control the properties of quantum matter. Recent efforts are focused on studying the ordered states which appear exclusively under the time-dependent drives. Here, we demonstrate a class of systems which feature dynamic spin-triplet superconducting order stimulated by the alternating electric field. The effect is based on the interplay of ferromagnetism, interfacial spin-orbital coupling, and the condensate motion driven by the field, which converts hidden static p-wave order, produced by the joint action of the ferromagnetism and the spin-orbital coupling, into dynamic s-wave equal-spintriplet correlations. We demonstrate that the critical current of Josephson junctions hosting these states is proportional to the electromagnetic power, supplied either by the external irradiation or by the ac current source. Based on these unusual properties we propose the scheme of a Josephson transistor which can be switched by the ac voltage and demonstrates an even-numbered sequence of Shapiro steps. Combining the photoactive Josephson junctions with recently discovered Josephson phase batteries we find photomagnetic SQUID devices which can generate spontaneous magnetic fields while being exposed to irradiation.

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confidence: 84%

Dynamic Spin-Triplet Order Induced by Alternating Electric Fields in Superconductor-Ferromagnet-Superconductor Josephson Junctions

2021

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“…Keeping only the slowest varying term in the angular-dependent part of the potential proportional to cos( − ′ )∕2, we getṼ intra = V s (q − q ′ ) cos( − ′ )∕2. The self-consistent gap equation becomes (22) and the excitonic gap is given by…”

Section: Intranodal Versus Internodal Interactionsmentioning

confidence: 99%

“…Prominent recent examples include novel dynamical states in periodically driven systems, such as Floquet topological insulators and time crystals, nonlinear optical and transport effects in graphene and related materials, phonon‐driven Floquet states, light‐induced superconductivity, and transient, or non‐equilibrium, exciton condensate in pumped semimetals and semiconductors . Another example is intrinsically dynamical orders such as odd‐frequency, or Berezinskii, superconducting pairing, which involves correlations non‐local in time and naturally manifests in the time domain, see also related paper in this volume …”

Section: Introductionmentioning

confidence: 99%

Dynamically Induced Excitonic Instability in Pumped Dirac Materials

Pertsova

Balatsky

2020

Annalen der Physik

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Driven and non‐equilibrium quantum states of matter have attracted growing interest in both theoretical and experimental studies in condensed matter physics. Recent progress in realizing transient collective states in driven or pumped Dirac materials (DMs) is reviewed herein. In particular, the focus is on optically pumped DMs which are a promising platform for transient excitonic instabilities. Optical pumping combined with the linear (Dirac) dispersion of the electronic spectrum offers a knob for tuning the effective interaction between the photoexcited electrons and holes, and thus provides a way of reducing the critical coupling for excitonic instability. As a result, a transient excitonic condensate could be achieved in a pumped DM while it is not feasible in equilibrium. A unifying theoretical framework is provided for describing transient collective states in 2D and 3D DMs. The experimental signatures are described and numerical estimates of the size of the dynamically induced excitonic gaps and the values of the critical temperatures for several specific systems, are summarized. In addition, general guidelines for identifying promising material candidates are discussed. Finally, comments are provided regarding recent experimental efforts in realizing transient excitonic condensate in pumped DMs, and outstanding issues and possible future directions are outlined.

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“…The relation of oddfrequency, or Berezinskii, pairing to dynamic order is discussed in the article by A.V. Balatsky et al [1] This rapid research letter proposes the concept of the time-independent correlators for the even-and odd-frequency pairing states that can be defined for both bosonic and fermionic quasiparticles. It demonstrates that these time independent correlators explicitly capture the existence of two distinct classes of pairing states: one corresponding to the conventional Bardeen-Cooper-Schrieffer (BCS) state and another captures the dynamic odd-frequency superconducting state.…”

Section: Doi: 101002/andp202000037mentioning

confidence: 99%

“…The relation of odd‐frequency, or Berezinskii, pairing to dynamic order is discussed in the article by A.V. Balatsky et al . This rapid research letter proposes the concept of the time‐independent correlators for the even‐ and odd‐frequency pairing states that can be defined for both bosonic and fermionic quasiparticles.…”

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confidence: 99%

Dynamic Quantum Matter

et al. 2020

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We are witnessing rapid developments in the field of quantum materials with the focus on some of the most profound concepts in condensed matter, including entangled orders, quantum coherence, and quantum topology. Quantum correlations in these materials naturally reveal themselves in the time domain, since their temporal evolution is governed by the full Hamiltonian, which contains multiple interactions. Therefore, nonequilibrium quantum dynamics emerges as a design principle to create desired quantum materials and functionalities. We see a growing focus on dynamics as a way to understand and control the fundamental physical processes that emerge due to quantum coherence of entangled quantum matter. Commensurate with the developments in theory and modeling of quantum materials, we see a rapid rise of new probes for the examination of quantum matter. These new probes include ultra-fast optics, free-electron lasers, and new neutron scattering facilities with capabilities to probe quantum matter at the increasingly short time scale while maintaining high-spatial resolution. Reflecting on recent progress and excitement in the field, we organized a workshop on Dynamic Quantum Matter Dec 10-14, 2018 at the Nordic Institute for Theoretical Physics (NORDITA, https://indico.fysik.su.se/event/6504/). As a result of this conference, we put together a special issue of the Annalen der Physik on "Dynamic Quantum Matter". We summarize the contributions in this volume. This special issue contains a rapid research letter, four feature articles, five original papers, and a perspective on the dynamics of various forms of quantum matter and materials ranging from superconductivity to magnetism, bosonic and fermionic Dirac materials ferro-states in 2D materials.

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Quantum Pairing Time Orders

Cited by 4 publications

References 18 publications

Dynamic Spin-Triplet Order Induced by Alternating Electric Fields in Superconductor-Ferromagnet-Superconductor Josephson Junctions

Dynamic Spin-Triplet Order Induced by Alternating Electric Fields in Superconductor-Ferromagnet-Superconductor Josephson Junctions

Dynamically Induced Excitonic Instability in Pumped Dirac Materials

Dynamic Quantum Matter

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