Materials design for new superconductors

Norman, M. R.

doi:10.1088/0034-4885/79/7/074502

Cited by 71 publications

(47 citation statements)

References 129 publications

(158 reference statements)

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“…Quantum simulators based on cold-atom systems are poised to generate additional insight into the manyelectron problem 64,65 . With any luck, this concerted effort will soon enable the controlled manipulation of strongly correlated electron systems, and eventually the theory-guided design 66 of quantum materials with collective electronic order sufficiently robust to withstand thermal decoherence at room temperature and beyond.…”

Section: Excitonic Insulatorsmentioning

confidence: 99%

The physics of quantum materials

2017

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The physical description of all materials is rooted in quantum mechanics, which describes how atoms bond and electrons interact at a fundamental level. Although these quantum e ects can in many cases be approximated by a classical description at the macroscopic level, in recent years there has been growing interest in material systems where quantum e ects remain manifest over a wider range of energy and length scales. Such quantum materials include superconductors, graphene, topological insulators, Weyl semimetals, quantum spin liquids, and spin ices. Many of them derive their properties from reduced dimensionality, in particular from confinement of electrons to two-dimensional sheets. Moreover, they tend to be materials in which electrons cannot be considered as independent particles but interact strongly and give rise to collective excitations known as quasiparticles. In all cases, however, quantum-mechanical e ects fundamentally alter properties of the material. This Review surveys the electronic properties of quantum materials through the prism of the electron wavefunction, and examines how its entanglement and topology give rise to a rich variety of quantum states and phases; these are less classically describable than conventional ordered states also driven by quantum mechanics, such as ferromagnetism.T he way we think about manifestations of quantum physics in materials has recently undergone a profound change of perspective. Although materials scientists and engineers have long exploited quantum effects in a range of electronic deviceswell-known examples are the quantized electronic energy levels and optical selection rules at the heart of optoelectronics, and the tunnel effect that underlies the upcoming generation of harddisk drives 1,2 -the past decade has seen a dramatic increase in our understanding of how subtle quantum effects control the macroscopic behaviour of a whole range of different materials.Two strange and beautiful aspects of quantum mechanics have come to the fore. One is the topological nature of quantum wavefunctions. A familiar example is the existence of quantized vortices in superconductors. These vortices exist because of the requirement that the superconducting condensate have a well-defined phase, and gauge invariance fixes how this phase couples to magnetic flux. The phase can wind only by an integer multiple of 2π around a vortex, and this integer winding number is a simple example of a topological invariant: a quantity that remains fixed under smooth changes of a system. Similar topological quantities turn out to govern many other kinds of materials, not just superconductors, and these support phenomena ranging from dissipationless transport to novel quasiparticle excitations.Another deep feature of quantum mechanics is the non-local entanglement of some quantum states that is spectacularly highlighted in teleportation experiments with two photons separated over macroscopic distances 3 . Even the wavefunction of two spins in a singlet is entangled, in that the wavefunction of...

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Section: Excitonic Insulatorsmentioning

confidence: 99%

The physics of quantum materials

2017

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“…A combination of highthroughput methods advantageous in large-scale scanning and conventional techniques helpful in fine study is promising to elucidate the key ingredients of superconductivity. [70] 127402-5…”

Section: -3mentioning

confidence: 99%

Effect of Mn substitution on superconductivity in iron selenide (Li, Fe)OHFeSe single crystals

Mao

Zhou

et al. 2018

Chinese Phys. B

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As an essential component of the Materials Genome Initiative aiming to shorten the period of materials research and development, combinatorial synthesis and rapid characterization technologies have been playing a more and more important role in exploring new materials and comprehensively understanding materials properties. In this review, we discuss the advantages of high-throughput experimental techniques in researches on superconductors. The evolution of combinatorial thin-film technology and several high-speed screening devices are briefly introduced. We emphasize the necessity to develop new high-throughput research modes such as a combination of high-throughput techniques and conventional methods.

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“…One may also try to dope AgF 2 directly (or one of its high-pressure forms, if it could be quenched [47]). Ag 2+ fluoride materials are certainly a promising candidate to thoroughly investigate within some kind of "materials genome" initiative [90].…”

Section: The Prospectmentioning

confidence: 99%

Silverland: the Realm of Compounds of Divalent Silver—and Why They are Interesting

Grochala

2017

J Supercond Nov Magn

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In this personal account, the author takes readers on the journey to "Silverland," i.e., the emerging field of electronic and magnetic materials based on divalent silver (Ag 2+ ). He blends historical background with the reasons which led him to become involved in this research, as well as to proposing (with Roald Hoffmann, 2001) that high-T C superconductivity might ultimately be observed in doped Ag 2+ fluorides. More recent experimental and theoretical findings related to novel compounds, and their electronic and magnetic structure, are presented.

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Materials design for new superconductors

Cited by 71 publications

References 129 publications

The physics of quantum materials

The physics of quantum materials

Effect of Mn substitution on superconductivity in iron selenide (Li, Fe)OHFeSe single crystals

Silverland: the Realm of Compounds of Divalent Silver—and Why They are Interesting

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