Works (24)

Updated: July 8th, 2023 21:13

2022 journal article

Fabricating Graphene Oxide/h-BN Metal Insulator Semiconductor Diodes by Nanosecond Laser Irradiation

NANOMATERIALS, 12(15).

By: S. Gupta n, P. Joshi n, R. Sachan* & J. Narayan n

author keywords: Raman spectroscopy; h-BN; 2D materials; laser irradiation; graphene; molecular dynamics; Fowler-Nordheim tunneling; transmission electron microscopy
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 9, 2022

2022 journal article

Spin Engineering of VO2 Phase Transitions and Removal of Structural Transition

ACS APPLIED MATERIALS & INTERFACES, 14(10), 12883–12892.

By: A. Moatti n, G. Mineo-Foley n, S. Gupta n, R. Sachan* & J. Narayan n

author keywords: spin engineering; exchange bias; VO2; structural pinning; magnetocaloric effect
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: March 3, 2022

2021 journal article

Atomic-Scale Insights on Large-Misfit Heterointerfaces in LSMO/MgO/c-Al2O3

CRYSTALS, 11(12).

By: S. Mandal*, A. Gupta*, B. Beavers*, V. Singh*, J. Narayan n & R. Sachan*

author keywords: scanning transmission electron microscopy; lanthanum strontium manganese oxide; heterointerfaces; domain matching epitaxy; large misfit systems
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: January 10, 2022

2021 journal article

Enhanced Vapor Transmission Barrier Properties via Silicon-Incorporated Diamond-Like Carbon Coating

POLYMERS, 13(20).

By: P. Riley n, P. Joshi n, S. Azizi Machekposhti n, R. Sachan*, J. Narayan n & R. Narayan n

author keywords: coating; surface structure; moisture vapor transmission; silicon-incorporated diamond-like carbon; plasma-enhanced chemical vapor deposition; water stability
TL;DR: Reducing the moisture vapor transmission through a commercial polymer bag material using a silicon-incorporated diamond-like carbon (Si-DLC) coating that was deposited using plasma-enhanced chemical vapor deposition is described. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: November 15, 2021

2020 journal article

Evidence of weak antilocalization in epitaxial TiN thin films

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 498.

By: S. Gupta*, R. Sachan* & J. Narayan*

author keywords: Weak antilocalization; Ferromagnetism; Epitaxy; Thin films; Raman spectroscopy; Domain matching epitaxy; Electron energy-loss spectroscopy
Sources: Web Of Science, NC State University Libraries
Added: January 13, 2020

2019 journal article

Diamond film growth by HFCVD on Q-carbon seeded substrate

CARBON, 141, 182–189.

By: R. Sachan n, A. Bhaumik n, P. Pant n, J. Prater n & J. Narayan n

author keywords: Q-carbon; Hot filament chemical vapor deposition; Diamond film; Transmission electron microscopy; Raman spectroscopy
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: December 10, 2018

2019 journal article

Electrical Transition in Isostructural VO2 Thin-Film Heterostructures

Scientific Reports, 9(1).

By: A. Moatti n, R. Sachan n, V. Cooper* & J. Narayan n

TL;DR: This work designs a novel strain-stabilized isostructural VO2 epitaxial thin-film system where the electrical transition occurs without any observable structural transition, and calculates that the strain in monoclinic structure reduces the difference between long and short V-V bond-lengths in monOClinic structures which leads to a systematic decrease in the electronic bandgap of VO2. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: March 1, 2019

2019 journal article

Search for near room-temperature superconductivity in B-doped Q-carbon

MATERIALS RESEARCH LETTERS, 7(4), 164–172.

By: J. Narayan n, R. Sachan n & A. Bhaumik n

author keywords: High-temperature superconductors; Q-carbon; BCS superconductivity; Cryo-EELS
Sources: Web Of Science, NC State University Libraries
Added: April 22, 2019

2019 journal article

Structure-property correlations in thermally processed epitaxial LSMO films

ACTA MATERIALIA, 163, 189–198.

By: D. Rasic n, R. Sachan n, J. Prater* & J. Narayan n

author keywords: Point defects; Magnetization; Oxygen vacancy; Lanthanum strontium manganese oxide; Annealing
Sources: Web Of Science, NC State University Libraries
Added: December 10, 2018

2019 journal article

Synthesis of diamond nanostructures from carbon nanotube and formation of diamond-CNT hybrid structures

CARBON, 150, 388–395.

By: A. Haque n, R. Sachan* & J. Narayan n

author keywords: CNT; Diamond; Undercooling; Raman spectroscopy; EBSD; EELS; CVD; Pulsed laser annealing
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 8, 2019

2019 journal article

Tunable charge states of nitrogen-vacancy centers in diamond for ultrafast quantum devices

Carbon, 142, 662–672.

By: A. Bhaumik n, R. Sachan n & J. Narayan n

author keywords: NV-diamond; Raman spectroscopy; Electron energy-loss spectroscopy; Non-equilibrium synthesis
UN Sustainable Development Goal Categories
Sources: Web Of Science, Crossref, NC State University Libraries
Added: December 17, 2018

2018 journal article

An optimized sample preparation approach for atomic resolution in situ studies of thin films

Microscopy Research and Technique, 81(11), 1250–1256.

By: A. Moatti n, R. Sachan n, J. Prater n & J. Narayan n

author keywords: in situ FIB sample preparation; in situ heating; scanning transmission electron microscopy; structural transition; VO2 thin films
TL;DR: This work provides the details of a simple and reliable method with less damage to prepare electron transparent samples for in situ studies in scanning/transmission electron microscopy and presents the atomically resolved structural transition in VO2 films using this technique. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: January 7, 2019

2018 journal article

Enhanced mechanical properties of Q-carbon nanocomposites by nanosecond pulsed laser annealing

NANOTECHNOLOGY, 29(45).

By: S. Gupta n, R. Sachan n, A. Bhaumik n & J. Narayan n

Contributors: S. Gupta n, R. Sachan n, A. Bhaumik n & J. Narayan n

author keywords: pulsed laser annealing; Raman spectroscopy; electron energy loss spectroscopy; nanoindentation; Q-carbon
TL;DR: In this report, a single-step strategy to fabricate adherent coatings of hard and lubricating Q-carbon nanocomposites is presented and carbon-based superhard materials for longer lasting protective coatings and related applications are advanced. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: October 16, 2018

2018 journal article

High temperature superconductivity in distinct phases of amorphous B-doped Q-carbon

Journal of Applied Physics, 123(13).

By: J. Narayan, A. Bhaumik & R. Sachan

Source: NC State University Libraries
Added: August 6, 2018

2018 journal article

Magnetic relaxation and three-dimensional critical fluctuations in B-doped Q-carbon - a high-temperature superconductor

NANOSCALE, 10(26), 12665–12673.

By: A. Bhaumik n, R. Sachan n & J. Narayan n

TL;DR: The creep of trapped magnetic flux and three-dimensional critical fluctuations near the superconducting transition temperature (Tc = 36 K) in B-doped amorphous Q-carbon are reported and moderate to strong electron-phonon coupling in B.doped Q- carbon is validated as a BCS type-II superconductor. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 journal article

Oxygen Effect on the Properties of Epitaxial (110) La0.7Sr0.3MnO3 by Defect Engineering

ACS APPLIED MATERIALS & INTERFACES, 10(24), 21001–21008.

By: D. Rasic n, R. Sachan n, N. Temizer n, J. Prater & J. Narayan n

author keywords: multiferroics; oxygen concentration; resistivity; lanthanum strontium manganese oxide; lattice strain; defect engineering
TL;DR: A systematic increase in the interplanar spacing was observed by X-ray diffraction of the films with lower oxygen concentration, indicating the decrease in the lattice constant in the plane due to the point defects. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2018 journal article

Progress in Q-carbon and related materials with extraordinary properties

MATERIALS RESEARCH LETTERS, 6(7), 353–364.

By: J. Narayan n, A. Bhaumik n, S. Gupta n, A. Haque n & R. Sachan n

Contributors: J. Narayan n, A. Bhaumik n, S. Gupta n, A. Haque n & R. Sachan n

author keywords: Q-carbon; Q-BN; hardness; diamond microneedles; Raman spectroscopy
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2018 journal article

Q-carbon harder than diamond

MRS COMMUNICATIONS, 8(2), 428–436.

By: J. Narayan n, S. Gupta n, A. Bhaumik n, R. Sachan*, F. Cellini* & E. Riedo*

Contributors: J. Narayan n, S. Gupta n, A. Bhaumik n, R. Sachan*, F. Cellini* & E. Riedo*

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2018 journal article

Undercooling driven growth of Q-carbon, diamond, and graphite

MRS COMMUNICATIONS, 8(2), 533–540.

By: S. Gupta n, R. Sachan*, A. Bhaumik n, P. Pant n & J. Narayan n

Contributors: S. Gupta n, R. Sachan*, A. Bhaumik n, P. Pant n & J. Narayan n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

A novel high-temperature carbon-based superconductor: B-doped Q-carbon

Journal of Applied Physics, 122(4).

By: A. Bhaumik, R. Sachan & J. Narayan

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Control of Structural and Electrical Transitions of VO2 Thin Films

ACS APPLIED MATERIALS & INTERFACES, 9(28), 24298–24307.

By: A. Moatti n, R. Sachan n, J. Prater n & J. Narayan n

author keywords: VO2 thin films; domain-matching epitaxy; epitaxial strain; structural and electrical transitions; thermodynamic and kinetic models; activation barrier
TL;DR: It is suggested that the control of structural and electrical transitions is possible by varying the transition activation barrier for atomic jumps through the strain engineering. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

Discovery of High-Temperature Superconductivity (T-c=55 K) in B-Doped Q-Carbon

ACS NANO, 11(12), 11915–11922.

By: A. Bhaumik n, R. Sachan n, S. Gupta n & J. Narayan n

Contributors: A. Bhaumik n, R. Sachan n, S. Gupta n & J. Narayan n

author keywords: superconductivity; Q-carbon; magnetism; electron energy-loss spectroscopy; Raman spectroscopy
TL;DR: It is established that heavy B doping in Q-carbon is the pathway for achieving high-temperature superconductivity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2017 journal article

High-Temperature Superconductivity in Boron-Doped Q-Carbon

ACS NANO, 11(6), 5351–5357.

By: A. Bhaumik n, R. Sachan n & J. Narayan n

author keywords: superconductivity; quenched carbon; Raman spectroscopy; electron energy loss spectroscopy; secondary ion mass spectroscopy
TL;DR: It is proposed that the non-equilibrium undercooling-assisted synthesis method can be used to fabricate highly doped materials that provide greatly enhanced superconducting properties and that the quenching from metallic carbon liquid leads to a stronger electron-phonon coupling. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2017 journal article

Room Temperature Growth of Epitaxial Titanium Nitride Films by Pulsed Laser Deposition

Crystal Growth & Design, 17(12), 6634–6640.

By: D. Rasic n, R. Sachan n, M. Chisholm*, J. Prater & J. Narayan n

Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

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