Search Results - "Singer, Philip M"

Emergence of the spin polarized domains in the kagome lattice Heisenberg antiferromagnet Zn-barlowite (Zn0.95Cu0.05)Cu3(OD)6FBr by Yuan, Weishi, Wang, Jiaming, Singer, Philip M., Smaha, Rebecca W., Wen, Jiajia, Lee, Young S., Imai, Takashi

“…Kagome lattice Heisenberg antiferromagnets are known to be highly sensitive to perturbations caused by the structural disorder. NMR is a local probe ideally…”
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Diffusive coupling in heptane-saturated kerogen isolates evidenced by NMR T1-T2 and T2-T2 maps by Singer, Philip M., Chen, Zeliang, Wang, Xinglin, Hirasaki, George J.

“…[Display omitted] •Diffusive coupling found between inter-granular and dissolved heptane in kerogen.•T2-T2 maps show off-diagonal exchange peaks due to…”
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Molecular dynamics simulations of NMR relaxation and diffusion of bulk hydrocarbons and water by Singer, Philip M., Asthagiri, Dilip, Chapman, Walter G., Hirasaki, George J.

“…[Display omitted] •MD simulations of T1,2 and diffusion show good agreement with measurements.•No adjustable parameters are used in going from simulation data…”
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Emergence of spin singlets with inhomogeneous gaps in the kagome lattice Heisenberg antiferromagnets Zn-barlowite and herbertsmithite by Wang, Jiaming, Yuan, Weishi, Singer, Philip M., Smaha, Rebecca W., He, Wei, Wen, Jiajia, Lee, Young S., Imai, Takashi

“…The kagome Heisenberg antiferromagnet formed by frustrated spins arranged in a lattice of corner-sharing triangles is a prime candidate for hosting a quantum…”
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Critical Role of Confinement in the NMR Surface Relaxation and Diffusion of n‑Heptane in a Polymer Matrix Revealed by MD Simulations by Valiya Parambathu, Arjun, Singer, Philip M, Hirasaki, George J, Chapman, Walter G, Asthagiri, Dilipkumar

“…The mechanism behind the NMR surface-relaxation times (T 1S,2S) and the large T 1S/T 2S ratio of light hydrocarbons confined in the nanopores of kerogen…”
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Effect of Nanoconfinement on NMR Relaxation of Heptane in Kerogen from Molecular Simulations and Measurements by Valiya Parambathu, Arjun, Chapman, Walter G., Hirasaki, George J., Asthagiri, Dilipkumar, Singer, Philip M.

“…Kerogen-rich shale reservoirs will play a key role during the energy transition, yet the effects of nanoconfinement on the NMR relaxation of hydrocarbons in…”
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Molecular Modes Elucidate the Nuclear Magnetic Resonance Relaxation of Viscous Fluids by Valiya Parambathu, Arjun, Pinheiro dos Santos, Thiago J., Chapman, Walter G., Hirasaki, George J., Asthagiri, Dilipkumar N., Singer, Philip M.

“…The Bloembergen, Purcell, and Pound (BPP) theory of nuclear magnetic resonance (NMR) relaxation in fluids dating back to 1948 continues to be the linchpin in…”
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Distinguishing the Effect of Rock Wettability from Residual Oil on Foam Generation and Propagation in Porous Media by Amirmoshiri, Mohammadreza, Wang, Xinglin, Bai, Chutian, Tewari, Raj Deo, Xie, Sheena Xina, Bahrim, Ridhwan Zhafri Kamarul, Singer, Philip M, Farajzadeh, Rouhi, Biswal, Sibani Lisa, Hirasaki, George. J

“…One of the common challenges of applying foam for enhanced oil recovery is the foam instability in the presence of crude oil and nonwater-wet surfaces. In this…”
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Interpretation of NMR Relaxation in Bitumen and Organic Shale Using Polymer–Heptane Mixes by Singer, Philip M, Chen, Zeliang, Alemany, Lawrence B, Hirasaki, George J, Zhu, Kairan, Xie, Z. Harry, Vo, Tuan D

“…One of the much debated mysteries in 1H NMR relaxation measurements of bitumen and heavy crude oils is the departure from expected theoretical trends at high…”
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Elucidating the 1 H NMR Relaxation Mechanism in Polydisperse Polymers and Bitumen Using Measurements, MD Simulations, and Models by Singer, Philip M, Valiya Parambathu, Arjun, Wang, Xinglin, Asthagiri, Dilip, Chapman, Walter G, Hirasaki, George J, Fleury, Marc

“…The mechanism behind the H nuclear magnetic resonance (NMR) frequency dependence of and the viscosity dependence of for polydisperse polymers and bitumen…”
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A more accurate estimate of T2 distribution from direct analysis of NMR measurements by Gruber, Fred K., Venkataramanan, Lalitha, Habashy, Tarek M., Singer, Philip M., Freed, Denise E.

“…[Display omitted] ▸ We propose a modified inversion of the relaxation distribution from NMR data. ▸ Solution is less sensitive to regularization. ▸ Estimates…”
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Characterization of Single-Phase Flow Through Carbonate Rocks: Quantitative Comparison of NMR Flow Propagator Measurements with a Realistic Pore Network Model by Zhao, Weishu, Picard, Guillemette, Leu, Gabriela, Singer, Philip M.

“…We report here the quantitative comparisons between the measured NMR flow propagator of a carbonate rock and the flow propagator calculated with a porous…”
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Low magnetic fields for flow propagators in permeable rocks by Singer, Philip M., Leu, Gabriela, Fordham, Edmund J., Sen, Pabitra N.

“…Pulsed field gradient NMR flow propagators for water flow in Bentheimer sandstone are measured at low fields ( 1H resonance 2 MHz), using both unipolar and…”
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Diffusive coupling in heptane-saturated kerogen isolates evidenced by NMR T 1 - T 2 and T 2 - T 2 maps by Singer, Philip M., Chen, Zeliang, Wang, Xinglin, Hirasaki, George J.

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Separation of solid and liquid components in organic-rich chalks using NMR relaxation by Liu, Yunke, Wang, Xinglin, Hirasaki, George J., Vinegar, Eva G., Vinegar, Harold J., Singer, Philip M.

“…[Display omitted] •Solid components obtained from multi-Gaussian T2G decay using solid-echo.•Liquid components obtained from multi-exponential T2e decay using…”
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Characterization of kerogen and bitumen in Type II-S organic-rich chalk as a function of maturity using 2D NMR relaxation by Liu, Yunke, Wang, Xinglin, Hirasaki, George J., Vinegar, Eva G., Vinegar, Harold J., Singer, Philip M.

“…As kerogen matures over geological times, bitumen is generated inside kerogen. With further maturation, bitumen can coat the inorganic meso-macro pores, which…”
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Spin Excitations of a Proximate Kitaev Quantum Spin Liquid Realized in Cu2IrO3 by Takahashi, Sean K, Wang, Jiaming, Arsenault, Alexandre, Imai, Takashi

“…Magnetic moments arranged at the corners of a honeycomb lattice are predicted to form a novel state of matter, the Kitaev quantum spin liquid, under the…”
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Revisiting the 63 Cu NMR Signature of Charge Order in La 1.875 Ba 0.125 CuO 4 by Imai, Takashi, Singer, Philip M., Arsenault, Alexandre, Fujita, Masaki

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Revisiting the 63Cu NMR Signature of Charge Order in La1.875Ba0.125CuO4 by Imai, Takashi, Singer, Philip M, Arsenault, Alexandre, Fujita, Masaki

“…We use single crystal 63Cu NMR techniques to revisit the early 63Cu NQR signature of charge order observed for La1.875Ba0.125CuO4 (Tc = 4 K) [A. W. Hunt et…”
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Freezing of the Lattice in the Kagome Lattice Heisenberg Antiferromagnet Zn-Barlowite ZnCu3(OD)6FBr by Wang, Jiaming, Yuan, Weishi, Singer, Philip M., Smaha, Rebecca W., He, Wei, Wen, Jiajia, Lee, Young S., Imai, Takashi

“…Here, we use 79Br nuclear quadrupole resonance (NQR) to demonstrate that ultraslow lattice dynamics set in below the temperature scale set by the Cu-Cu…”
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