Metastable rocksalt ZnO is 
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-type dopable

Goyal, Anuj; Stevanović, Vladan

doi:10.1103/physrevmaterials.2.084603

Cited by 19 publications

(15 citation statements)

References 44 publications

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“…Metastable polymorphs are important for technological applications because they can have completely different properties than those of their thermodynamically stable ground states. For example, it is theoretically predicted that the archetypical wide-band-gap (WBG) n-type semiconductor ZnO can be doped to form a p-type semiconductor using Li, if its rock salt polymorph, rather than wurtzite ground state, is stabilized [1]. This is important because WBG p-type semiconductors are desirable for (opto-)electronic devices, such as solar cells, thinfilm transistors, photodetectors, and light-emitting diodes [2][3][4], but their p-type doping is often difficult to achieve [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Templated Growth of Metastable Polymorphs on Amorphous Substrates with Seed Layers

et al. 2020

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Metastable inorganic materials with unique properties are important in many practical applications, but their synthesis is often challenging. In physics, epitaxial stabilization, also known as pseudomorphic growth, is used to synthesize metastable polymorphs, but usually only as very thin films and on expensive single-crystal substrates. In chemistry, the templated growth of inorganic solid-state materials on selfassembled monolayers of organic molecules is reported. Bridging these two fields, here, we show that the synthesis of metastable polymorphs is possible up to large film thickness on amorphous substrates covered with thin inorganic seed layers that serve as templates. The stabilization of a 500-nm-thick metastable wurtzite (WZ) MnTe film by a 5-nm-thick ZnTe seed layer sputtered on amorphous glass substrates is experimentally demonstrated. Theoretical calculations explain this experimental observation by the small WZ polymorph energy relative to that of the ground-state nickeline (NC) structure of MnTe and a large lattice constant difference of the two. The resulting metastable WZ-MnTe polymorph exhibits a wide band gap of 2.7 eV and a low hole density of 10 12 cm −3 , which is relevant to optoelectronic applications. These properties are in sharp contrast to those of the narrow-band-gap highly doped NC-MnTe with 1.3 eV band gap and 10 19 cm −3 hole density. The difference in hole density is due to the calculated difference in the formation energy of manganese vacancy acceptor defects. Overall, these results suggest that templated growth on amorphous substrates with seed layers can be used to synthesize metastable polymorphs of other materials, without the need for expensive single-crystal substrates.

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Section: Introductionmentioning

confidence: 99%

Templated Growth of Metastable Polymorphs on Amorphous Substrates with Seed Layers

et al. 2020

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“…We then show that these models can each be described within the Feynman formulation of quantum theory and be synthesized to derive the Feynman's form of the symmetrization procedure [15]. As we show elsewhere [16,17] and summarize here, this procedure can be transformed into a state-based symmetrization procedure which is empirically adequate yet differs from Dirac's procedure in form and meaning, in particular allowing for the natural emergence of reidentifiability in special cases.…”

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confidence: 90%

Persistence and Nonpersistence as Complementary Models of Identical Quantum Particles

Goyal

2018

Preprint

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According to our understanding of the everyday physical world, observable phenomena are underpinned by persistent objects that can be reidentified (or tracked) across time by observation of their distinctive properties. This understanding is reflected in classical mechanics, which posits that matter consists of persistent, reidentifiable particles. However, the mathematical symmetrization procedures used to describe identical particles within the quantum formalism have led to the widespread belief that identical quantum particles lack either persistence or reidentifiability. However, it has proved difficult to reconcile these assertions with the fact that identical particles are routinely assumed to be reidentifiable in particular circumstances. For example, when two electrons move through a bubble chamber, each is said to generate a sequence of bubbles (a 'track') that is caused by one and the same particle. Moreover, neither of these assertions accounts for the mathematical form of the symmetrization procedures used to describe identical particles within the quantum framework, leaving open theoretical possibilities other than bosonic and fermionic behavior, such as paraparticles, which do not appear to be realized in nature. Here we propose the novel idea that both persistence and nonpersistence models must be employed in order to fully account for the behaviour of identical particles. Thus, identical particles are neither persistent nor nonpersistent. We prove the viability of this viewpoint by showing how Feynman's and Dirac's symmetrization procedures arise through a synthesis of a quantum treatment of these models, and by showing how reidentifiability emerges in a context-dependent manner. We further show that the persistence and nonpersistence models satisfy the key characteristics of Bohr's concept of complementarity, and thereby propose that the behavior of identical particles is a manifestation of a persistence-nonpersistence complementarity, analogous to Bohr's wave-particle complementarity for individual particles. Finally, we construct a precise parallel between these two complementarities, and detail their conceptual similarities and dissimilarities.

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“…The zinc blend structure can be obtained using a ZnO epitaxial growth on cubic structured substrates whereas the rock salt one can only be synthesized under high temperature and pressure (around 9 GPa) conditions [48].…”

Section: Crystallographic Structurementioning

confidence: 99%

TiO 2 , ZnO, and SnO 2 -based metal oxides for photocatalytic applications: principles and development

Ishchenko¹,

Rogé²,

Lamblin³

et al. 2021

Comptes Rendus. Chimie

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Metastable rocksalt ZnO is p -type dopable

Cited by 19 publications

References 44 publications

Templated Growth of Metastable Polymorphs on Amorphous Substrates with Seed Layers

Templated Growth of Metastable Polymorphs on Amorphous Substrates with Seed Layers

Persistence and Nonpersistence as Complementary Models of Identical Quantum Particles

TiO 2 , ZnO, and SnO 2 -based metal oxides for photocatalytic applications: principles and development

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