Lynn Boatner

Lynn Boatner
Retired - Oak Ridge National Laboratory

Ph.D. Physics

About

930
Publications
80,548
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
26,225
Citations
Citations since 2016
61 Research Items
7255 Citations
201620172018201920202021202202004006008001,000
201620172018201920202021202202004006008001,000
201620172018201920202021202202004006008001,000
201620172018201920202021202202004006008001,000
Additional affiliations
December 2017 - present
Oak Ridge National Laboratory
Position
  • Managing Director
January 1982 - present
Oak Ridge National Laboratory
Position
  • Managing Director
Description
  • Corporate Fellow and Battelle Distinguished Inventor Director, ORNL Center for Radiation Detection Materials and Systems Leader, Synthesis and Processing of Novel Materials Group Oak Ridge National Laboratory
January 1979 - present
Oak Ridge National Laboratory
Position
  • To request a copy of any of my publications
Description
  • To request a copy of any of my publications, please email my administrative assistant at s88@ornl.gov with your name, reason for request and citation of the requested article and please mention Research Gate.
Education
July 1962 - April 1966
Vanderbilt University
Field of study
  • Physics, Math.
August 1960 - March 1961
Texas Tech University
Field of study
  • Physics, Math.
August 1958 - May 1960
Texas Tech University
Field of study
  • Physics, Math.

Publications

Publications (930)
Article
Full-text available
Recent advances in the theory and experimental realization of ferromagnetic semiconductors give hope that a new generation of microelectronic devices based on the spin degree of freedom of the electron can be developed. This review focuses primarily on promising candidate materials (such as GaN, GaP and ZnO) in which there is already a technology b...
Article
Full-text available
We have investigated the magnetic properties of Mn-implanted n-type ZnO single crystals that are codoped with Sn. Theory predicts that room-temperature carrier-mediated ferromagnetism should be possible in manganese-doped p-type ZnO, although Mn-doped n-type ZnO should not be ferromagnetic. While previous efforts report only low-temperature ferroma...
Article
Full-text available
The magnetic and structural properties of cobalt-implanted ZnO single crystals are reported. High-quality, (110)-oriented single-crystal Sn-doped ZnO substrates were implanted at similar to350 degreesC with Co to yield transition metal concentrations of 3-5 at. % in the near-surface (similar to2000 Angstrom) region. After implantation, the samples...
Article
Existing semiconductor electronic and photonic devices utilize the charge on electrons and holes in order to perform their specific functionality such as signal processing or light emission. The relatively new field of semiconductor spintronics seeks, in addition, to exploit the spin of charge carriers in new generations of transistors, lasers and...
Article
Full-text available
Ion implantation damage and annealing results are presented for a number of crystalline oxides. In Al<sub>2</sub>O<sub>3</sub>, the amorphous phase produced by ion bombardment of the pure material first crystallizes in the (crystal-line) Y phase. This is followed by the transformaiton of Y-Al<sub>2</sub>O<sub>3</sub> to a-Al<sub>2</sub>O<sub>3</sub...
Article
Full-text available
Excess charge on polar surfaces of ionic compounds is commonly described by the two-dimensional electron gas (2DEG) model, a homogeneous distribution of charge, spatially-confined in a few atomic layers. Here, by combining scanning probe microscopy with density functional theory calculations, we show that excess charge on the polar TaO2 termination...
Article
Full-text available
Understanding the irradiation-induced defects in oxides is of interest for a wide range of applications. ZnO is an interesting oxide with mixed ionic and covalent bonding that contains a variety of point defect structures-making it an excellent model for studying irradiation-induced defects and their impact on properties. Here, we investigate the e...
Article
Pronounced anomalies in the SrTiO3 dynamical structure factor, S(Q,E), including the disappearance of acoustic phonon branches at low temperatures, were uncovered with inelastic neutron scattering (INS) and simulations. The striking effect reflects anharmonic couplings between acoustic and optic phonons and the incipient ferroelectric instability n...
Article
We have previously reported (Boatner et al., J. Alloys Compd. 691 (2017) 666–671) on the discovery, formation, processing, and application of a new decorative ternary steel. alloy and on its use in a wide range of practical applications including: custom and commercial knives, art objects, jewelry, electronics, and furniture. This decorative proper...
Article
Full-text available
A cryo-quenched 70 wt % Fe-15 wt% Cr-15 wt% Ni single-crystal alloy with fcc (face centered cubic), bcc (body centered cubic), and hcp (hexagonal close packed) phases was implanted with 200 keV He+ ions up to 2 × 1017 ions·cm−2 at 773 K. Surface-relief features were observed subsequent to the He+ ion implantation, and transmission electron microsco...
Article
Activator impurities and their distribution in the host lattice play a key role in scintillation phenomena. Here a combination of cross-sectional noncontact atomic force microscopy, x-ray photoelectron spectroscopy, and density-functional theory were used to study the distribution of Eu2+ dopants in a NaI scintillator activated by 3% EuI2. A variet...
Article
Full-text available
We present the ultrafast THz response of VO2 under high pressures. A clear anomaly is observed around 8 GPa indicating a pressure-induced phase transition. Our observations can be interpreted in terms of a bandwidth-controlled Mott-Hubbard transition.
Article
Snapshots of a phase transition Time-resolved x-ray scattering can be used to investigate the dynamics of materials during the switch from one structural phase to another. So far, methods provide an ensemble average and may miss crucial aspects of the detailed mechanisms at play. Wall et al. used a total-scattering technique to probe the dynamics o...
Article
Fe-15Cr-15Ni (wt.%) austenitic stainless steel was irradiated with 200 keV ⁴He⁺ ions to a fluence of 5 × 10¹⁶/cm² at 500 °C. Radiation-induced segregation (RIS) at He bubbles in the irradiated steel was measured using Energy Dispersive X-ray Spectroscopy (EDS) coupled with Scanning Transmission Electron Microscopy (STEM). The RIS measurements exhib...
Article
Full-text available
Abstract By using positron annihilation spectroscopy methods, we have experimentally demonstrated the creation of isolated zinc vacancy concentrations >1020 cm−3 in chemical vapor transport (CVT)-grown ZnO bulk single crystals. X-ray diffraction ω-rocking curve (XRC) shows the good quality of ZnO single crystal with (110) orientation. The depth ana...
Preprint
Full-text available
Activator impurities and their distribution in the host lattice play a key role in scintillation phenomena. Here a combination of cross-sectional noncontact atomic force microscopy (nc-AFM), X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) was used to study the distribution of Eu2+ dopants in a NaI scintillator activated b...
Article
Full-text available
We utilize near-infrared pump—mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO2. A clear anomaly in the linear mid-infrared response as well as in the fluence dependence of the pump–probe signal is observed around 8 GPa indicating a pressure-induced phase transition. Distinct pump–probe signals and...
Article
We have previously reported on the formation of Suzuki Phase precipitate particles as a result of the addition of the divalent activator ion Eu ²⁺ to the monovalent alkali halide host LiI. [Boatner et al. (2017)]. These precipitates form during Bridgman or other melt-growth processes, even at low Eu²⁺ concentrations (e.g., 0.1% EuI2 doping), and sc...
Article
Hydrogen has been found to be an n-type dopant in In2O3 that gives rise to unintentional conductivity. An infrared (IR) absorption line observed at 3306 cm⁻¹ has been assigned to the Hi⁺ center. Two types of experiments have been performed to determine the diffusivity of Hi⁺ in In2O3 from its IR absorption spectra. (i) At temperatures near 700 K, t...
Article
Due to their very fast short-wavelength emission, neodymium-doped materials are a subject of current interest as potential scintillators. Although the initial reports regarding neodymium-doped orthophosphates (in crystalline form) and their scintillation properties appeared almost twenty years ago, they remain an interesting class of materials sinc...
Article
Full-text available
The performance of an organic-semiconductor device is critically determined by the geometric alignment, orientation, and ordering of the organic molecules. While an organic multilayer eventually adopts the crystal structure of the organic material, the alignment and configuration at the interface with the substrate/electrode material is essential f...
Article
Compensating a polar surface An ionic crystal surface can be electrostatically unstable, and the surface must reconstruct in some way to avoid this “polar catastrophe.” Setvin et al. used scanning probe microscopies and density functional theory to study the changes in the polar surface of the perovskite KTaO 3 . They observed several structural re...
Article
Full-text available
Sn dopant in ZnO may significantly improve the n-type conductivity of ZnO through a characteristic double effect. However, studies on bulk Sn-doped ZnO are rare, and the effect of Sn doping on the optoelectronic properties of bulk ZnO is not well understood. In this work, the effect of Sn doping on the optical and electrical properties of ZnO bulk...
Article
Full-text available
Changes in chemical and physical properties resulting from water adsorption play an important role in the characterization and performance of device-relevant materials. Studies of model oxides with well-characterized surfaces can provide detailed information that is vital for a general understanding of water-oxide interactions. In this work, we stu...
Poster
Luminescence properties of XPO 4 :Nd 3+ (X = Y, Lu, Sc, La) have been studied. Due to very fast, short-wavelength emission, neodymium-doped materials are a subject of interest as potential scintillators [1]. Although first studies of YPO 4 :Nd 3+ and LuPO 4 :Nd 3+ (in crystalline form) as potential scintillation materials were reported almost twent...
Article
Research is described here that is directed toward obtaining p-type ZnO crystals either by doping or by creating native defects. Theoretically, zinc vacancies are shallow acceptors that should allow for p-type conduction. Bulk ZnO crystals can be grown by chemical vapor transport (CVT), melt solidification, and hydrothermal methods. Here we have ex...
Article
We utilize near-infrared pump and mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO$_2$. Distinct pump-probe signals and a pumping threshold behavior are observed even in the pressure-induced metallic state showing a noticeable amount of localized electronic states. Our results are consistent with a...
Poster
Full-text available
Luminescence properties of XPO4:Nd3+ ( X = Y, Lu, Sc, La ) have been studied. Due to very fast, shortwavelength emission, neodymium-doped materials are a subject of interest as potential scintillators [1]. Although first studies of YPO4:Nd3+ and LuPO4:Nd3+ (in crystalline form) as potential scintillation materials were reported almost twenty years...
Article
Monovalent alkali halides such as NaI, CsI, and LiI are widely used as inorganic scintillators for radiation detection due to their light yield, the capability for the growth of large single crystals, relatively low cost, and other favorable characteristics. These materials are frequently activated through the addition of small amounts (e.g., a few...
Research
Full-text available
If you would like a copy for your research, please let me know.
Article
Mixed polyanion glass cathodes in lithium-ion batteries have high capacities (200-500 mAh/g), but currently these materials have fundamental problems with 1st-cycle irreversible loss, poor cycling efficiency, and capacity fade. It is well established that polyanion substitutions into glasses can dramatically affect their physical properties, but th...
Article
In lithium-ion batteries, mixed polyanion glass cathodes have demonstrated high capacities (200–500 mAh/g) by undergoing conversion and intercalation reactions. Mixed polyanion glasses typically have the same fundamental issues as other conversion cathodes, i.e.: large hysteresis, capacity fade, and 1st-cycle irreversible loss. A key advantage of g...
Article
Uniaxial-stress experiments performed for the 3306 cm �1 vibrational line assigned to the interstitialhydrogen, shallow-donor center in In2O3 reveal its symmetry and transition-moment direction. The defect alignment that can be produced by a [001] stress applied at 165K is due to a process that is also a hydrogen-diffusion jump, providing a microsc...
Article
Metal deposition on oxide surfaces usually results in adatoms, clusters, or islands of the deposited material, where defects in the surface often act as nucleation centers. Here an alternate configuration is reported. After the vapor deposition of Fe on the In2O3(111) surface at room temperature, ordered adatoms are observed with scanning tunneling...
Article
Full-text available
Fourier transform infrared (FTIR) measurements were carried out on thin films and bulk single crystals of ZnO over a wide temperature range to study the free-carrier and multi-phonon infrared absorptions and the effects of hydrogen incorporation on these properties. Aluminum-doped ZnO thin films were deposited on quartz substrates using atomic-laye...
Conference Paper
Full-text available
State Univ — The origins of the luminescence and scintillation properties of zinc oxide are studied by means of photo – luminescence (PL), X – ray induced lumines-cence (XRIL) [Review of Scientific Instruments 83, 103112(2012)], gamma – induced positron spectroscopy (GIPS), and scintillation counting measurements such as coupling the ZnO crystals t...
Article
Full-text available
This study provides new insights into the relationship between radiation-dose-dependent structural damage due to natural U and Th impurities and the anisotropic mechanical properties (Poisson’s ratio, elastic modulus and hardness) of zircon. Natural zircon samples from Sri Lanka (see Muarakami et al. in Am Mineral 76:1510–1532, 1991) and synthetic...
Article
Accurate elastic constants for gadolinium phosphate (GdPO4) have been measured by single-crystal high-pressure diffraction methods. The bulk modulus of GdPO4 determined under hydrostatic conditions, 128.1(8) GPa (Kʹ=5.8(2)), is markedly different from that obtained with GdPO4 under non-hydrostatic conditions (160(2) GPa), which indicates the import...
Article
The formation energetics of hydrous and dehydrated potassium hexaniobates are investigated using high-temperature oxide melt solution calorimetry. The enthalpies of formation of K4Nb6O17 and K4Nb6O17·3H2O from oxides are (−864.42 ± 10.63) and (−899.32 ± 11.48) kJ/mol, respectively. The formation enthalpy of K4Nb6O17 from elements is (−7289.64 ± 12....
Article
Full-text available
A series of nanoindentation tests on both single and polycrystalline specimens of a monazite rare-earth orthophosphate, GdPO4, revealed frequent observation of anomalous unloading behavior with a large degree of recovery, where previously this behavior had only been observed in xenotime-structure rare-earth orthophosphates. An indentation site in t...
Article
Full-text available
The luminescence and scintillation properties of ZnO single crystals were studied by photoluminescence and X-ray-induced luminescence (XRIL) techniques. XRIL allowed a direct comparison to be made between the near-band emission (NBE) and trap emissions providing insight into the carrier recombination efficiency in the ZnO crystals. It also provided...
Article
A decorative steel is described that is formed by a process that is unlike that of the fabrication methods utilized in making the original Damascus steels over 2000 years ago. The decorative aspect of the steel arises from a three-dimensional surface pattern that results from cryogenically quenching polished austenitic alloy single crystals into th...
Article
The introduction of a large concentration of H into VO2 is known to suppress the insulating phase of the metal-insulator transition that occurs upon cooling below 340 K. We have used infrared spectroscopy and complementary theory to study the properties of interstitial H and D in VO2 in the dilute limit to determine the vibrational frequencies, the...
Raw Data
The decorative aspect of the steel arises from a three-dimensional surface pattern that results from cryogenically quenching polished austenitic alloy single crystals into the martensitic phase that is present below 190 K.
Article
We have designed and built a modern versatile research-grade instrument for ultrasound pulse-echo probing of the elastic properties of a wide range of materials under laboratory conditions. The heart of the instrument lies in an AD8302 microchip: a gain and phase detector from Analog Devices, Inc. To construct the device, we have implemented a sche...
Article
Group IV donors in ZnO are poorly understood, despite evidence that they are effective n-type dopants. Here we present high-resolution photoluminescence (PL) spectroscopy studies of unintentionally doped and Sn-doped ZnO single crystals grown by the chemical vapor transport method. Doped samples showed greatly increased emission from the I10 bound...
Poster
Full-text available
A new decorative steel with applications spanning cutlery, jewelry, and numerous other similar uses is described. The process for forming this material is unlike that of any of the fabrication methods utilized in making the original Damascus steels or ³pattern-welded² (currently so-called ³Damascus²) steels. The decorative aspect arises from a thre...
Method
Full-text available
A single crystal Nal doped with 2% Eul2+ is shown after a thermal treatment to remove Suzuki-phase precipitates and restore optical clarity.
Article
Full-text available
Scintillation properties are often studied by photo-luminescence (PL) and scintillation measurements. In this work, we combine X-ray-induced luminescence (XRIL) spectroscopy [Review of Scientific Instruments 83, 103112 (2012)] with PL and standard scintillation measurements to give insight into the scintillation properties of un-doped ZnO single cr...
Research
Full-text available
Actual Crystals of LaPO4, CePO4,
Article
Full-text available
At ambient conditions the anhydrous rare earth orthophosphates assume either the xenotime (zircon) or the monazite structure, with the latter favored for the heavier rare earths and by increasing pressure. Tb0.5Gd0.5PO4 assumes the xenotime structure at ambient conditions but is at the border between the xenotime and monazite structures. Here we sh...
Article
Full-text available
Mixed polyanion glasses can undergo glass-state conversion (GSC) reactions to provide an alternate class of high-capacity cathode materials. GSC reactions have been demonstrated in phosphate/vanadate glasses with Ag, Co, Cu, Fe, and Ni cations. These mixed polyanion glasses provided high capacity and good high power performance, but suffer from mod...
Article
Crystals of K3Ln(PO4)2 (Ln: Lu, Yb, Er, Ho, Dy, Gd, Nd, Ce, Y, Sc) and M3Lu(PO4)2 (M: Rb, Cs) are prepared from a M4P2O7/Ln2O3 flux (Pt crucible, 1235 °C, 4 h) and their crystal structures are determined by single crystal XRD and powder neutron diffraction.
Research
Full-text available
Lead-Iron Phosphate Glass for Nuclear Containment https://www.youtube.com/watch?v=rR_vCV0wRVA&feature=youtube_gdata
Poster
Full-text available
Fluorescent lamps remain a relevant, energy-efficient branch of lighting technology. However, commercially available fluorescent bulbs currently rely on phosphor coatings predominately composed of expensive and scarce rare earth elements (REs). These phosphor materials are necessary for converting the mercury vapor emission within the lamp to visib...
Poster
Full-text available
Wishing you peace, joy, and all the best this wonderful holiday has to offer. May this incredible time of giving and spending time with family bring you joy that lasts throughout the year.
Conference Paper
Full-text available
Calendar 2016 - Cryogenically Quenched Single Crystal Stainless Steel - Allied High Tech Products, Month - June