Pressure-induced reentrant metallic phase in lithium

Matsuoka, Toshifumi; Sakata, Masafumi; Nakamoto, Yuki; Takahama, Kazushi; Ichimaru, Kota; Mukai, Kosuke; Ohta, Kenji; Hirao, Naohisa; Ohishi, Yasuo; Shimizu, Katsuya

doi:10.1103/physrevb.89.144103

Cited by 56 publications

(54 citation statements)

References 35 publications

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“…Sodium transforms into a dense insulating material that is optically transparent and lacks metallic characteristics at 200 GPa [482]. Lithium transforms to a semiconductor at 80 GPa [483], and then again to metal at 120 GPa [484,485].…”

Section: Insulator Semiconductor and Metalmentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

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Pressure profoundly alters all states of matter. The symbiotic development of ultrahighpressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.

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Section: Insulator Semiconductor and Metalmentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

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“…These include a deviation from simple metallic behavior, increasingly high temperature superconductivity, and a reentrant translation from metal to semiconductor [1][2][3][4][5][6][7] . One of the most remarkable properties of dense lithium is its anomalous melting.…”

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confidence: 99%

Role of quantum ion dynamics in the melting of lithium

et al. 2016

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“…At ambient conditions, all the alkali metals crystallize in the bcc structure [1,2] and display a free-electron like metallic character [3,4] . Application of pressure on these systems results in more complex structures [5,6] and remarkable physical phenomena such as unusual melting behavior [7,8] , Fermi-surface nesting [9] , phonon instabilities [10] , and superconductivities [11][12][13][14] , and transformations into poor metals or even insulators [15][16][17][18][19] . At ambient conditions, the ionic radius of Li has large disparity with respect to the other alkali metals [20] .…”

Section: Introductionmentioning

confidence: 99%

Predicted novel insulating electride compound between alkali metals lithium and sodium under high pressure

et al. 2017

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The application of high pressure can fundamentally modify the crystalline and electronic structures of elements as well as their chemical reactivity, which could lead to the formation of novel materials. Here, we explore the reactivity of lithium with sodium under high pressure, using a swarm structure searching techniques combined with first-principles calculations, which identify a thermodynamically stable LiNa compound adopting an orthorhombic oP8 phase at pressure above 355 GPa. The formation of LiNa may be a consequence of strong concentration of electrons transfer from the lithium and the sodium atoms into the interstitial sites, which also leads to opening a relatively wide band gap for LiNa-op8. This is substantially different from the picture that share or exchange electrons in common compounds and alloys. In addition, lattice-dynamic calculations indicate that LiNa-op8 remains dynamically stable when pressure decompresses down to 70 GPa.

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Pressure-induced reentrant metallic phase in lithium

Cited by 56 publications

References 35 publications

High-pressure studies with x-rays using diamond anvil cells

High-pressure studies with x-rays using diamond anvil cells

Role of quantum ion dynamics in the melting of lithium

Predicted novel insulating electride compound between alkali metals lithium and sodium under high pressure

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