Search Results - "Gray, A. X"

Nature of the metal-insulator transition in few-unit-cell-thick LaNiO3 films by Golalikhani, M., Lei, Q., Chandrasena, R. U., Kasaei, L., Park, H., Bai, J., Orgiani, P., Ciston, J., Sterbinsky, G. E., Arena, D. A., Shafer, P., Arenholz, E., Davidson, B. A., Millis, A. J., Gray, A. X., Xi, X. X.

“…The nature of the metal-insulator transition in thin films and superlattices of LaNiO 3 only a few unit cells in thickness remains elusive despite tremendous…”
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Correlation-Driven Insulator-Metal Transition in Near-Ideal Vanadium Dioxide Films by Gray, A X, Jeong, J, Aetukuri, N P, Granitzka, P, Chen, Z, Kukreja, R, Higley, D, Chase, T, Reid, A H, Ohldag, H, Marcus, M A, Scholl, A, Young, A T, Doran, A, Jenkins, C A, Shafer, P, Arenholz, E, Samant, M G, Parkin, S S P, Dürr, H A

“…We use polarization- and temperature-dependent x-ray absorption spectroscopy, in combination with photoelectron microscopy, x-ray diffraction, and electronic…”
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Bulk electronic structure of the dilute magnetic semiconductor Ga1−xMnxAs through hard X-ray angle-resolved photoemission by Gray, A. X., Minár, J., Ueda, S., Stone, P. R., Yamashita, Y., Fujii, J., Braun, J., Plucinski, L., Schneider, C. M., Panaccione, G., Ebert, H., Dubon, O. D., Kobayashi, K., Fadley, C. S.

“…A detailed understanding of the origin of the magnetism in dilute magnetic semiconductors is crucial to their development for applications. Using hard X-ray…”
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Electronic structure changes across the metamagnetic transition in FeRh via hard X-ray photoemission by Gray, A X, Cooke, D W, Krüger, P, Bordel, C, Kaiser, A M, Moyerman, S, Fullerton, E E, Ueda, S, Yamashita, Y, Gloskovskii, A, Schneider, C M, Drube, W, Kobayashi, K, Hellman, F, Fadley, C S

“…Stoichiometric FeRh undergoes a temperature-induced antiferromagnetic (AFM) to ferromagnetic (FM) transition at ~350 K. In this Letter, changes in the…”
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Identifying the electronic character and role of the Mn states in the valence band of (Ga,Mn)As by Fujii, J, Salles, B R, Sperl, M, Ueda, S, Kobata, M, Kobayashi, K, Yamashita, Y, Torelli, P, Utz, M, Fadley, C S, Gray, A X, Braun, J, Ebert, H, Di Marco, I, Eriksson, O, Thunström, P, Fecher, G H, Stryhanyuk, H, Ikenaga, E, Minár, J, Back, C H, van der Laan, G, Panaccione, G

“…We report high-resolution hard x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of Mn doping. Supported by theoretical calculations we…”
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Identification of different electron screening behavior between the bulk and surface of (Ga,Mn)As by Fujii, J, Sperl, M, Ueda, S, Kobayashi, K, Yamashita, Y, Kobata, M, Torelli, P, Borgatti, F, Utz, M, Fadley, C S, Gray, A X, Monaco, G, Back, C H, van der Laan, G, Panaccione, G

“…We report x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of both temperature and Mn doping. Analysis of Mn 2p core level spectra…”
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Ultrafast terahertz field control of electronic and structural interactions in vanadium dioxide by Gray, A., Hoffmann, M., Jeong, J., Aetukuri, N., Zhu, D., Hwang, H., Brandt, N., Wen, H., Sternbach, A., Bonetti, S., Reid, A., Kukreja, R., Graves, C., Wang, T., Granitzka, P., Chen, Z., Higley, D., Chase, T., Jal, E., Abreu, E., Liu, M., Weng, T.-C., Sokaras, D., Nordlund, D., Chollet, M., Alonso-Mori, R., Lemke, H., Glownia, J., Trigo, M., Zhu, Y., Ohldag, H., Freeland, J., Samant, M., Berakdar, J., Averitt, R., Nelson, K., Parkin, S., Dürr, H.

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Probing bulk electronic structure with hard X-ray angle-resolved photoemission by Gray, A. X., Papp, C., Ueda, S., Balke, B., Yamashita, Y., Plucinski, L., Minár, J., Braun, J., Ylvisaker, E. R., Schneider, C. M., Pickett, W. E., Ebert, H., Kobayashi, K., Fadley, C. S.

“…Traditional ultraviolet/soft X-ray angle-resolved photoemission spectroscopy (ARPES) may in some cases be too strongly influenced by surface effects to be a…”
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Temperature-driven nucleation of ferromagnetic domains in FeRh thin films by Baldasseroni, C., Bordel, C., Gray, A. X., Kaiser, A. M., Kronast, F., Herrero-Albillos, J., Schneider, C. M., Fadley, C. S., Hellman, F.

“…The evolution of ferromagnetic (FM) domains across the temperature-driven antiferromagnetic (AF) to FM phase transition in uncapped and capped epitaxial FeRh…”
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Observation of boron diffusion in an annealed Ta/CoFeB/MgO magnetic tunnel junction with standing-wave hard x-ray photoemission by Greer, A. A., Gray, A. X., Kanai, S., Kaiser, A. M., Ueda, S., Yamashita, Y., Bordel, C., Palsson, G., Maejima, N., Yang, S.-H., Conti, G., Kobayashi, K., Ikeda, S., Matsukura, F., Ohno, H., Schneider, C. M., Kortright, J. B., Hellman, F., Fadley, C. S.

“…The CoFeB/MgO system shows promise as a magnetic tunnel junction with perpendicular magnetization and low critical current densities for spin-torque driven…”
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Chemical stability of the magnetic oxide EuO directly on silicon observed by hard x-ray photoemission spectroscopy by Caspers, C., Müller, M., Gray, A. X., Kaiser, A. M., Gloskovskii, A., Fadley, C. S., Drube, W., Schneider, C. M.

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Suppression of near-Fermi level electronic states at the interface in a LaNiO3/SrTiO3 superlattice by Kaiser, A M, Gray, A X, Conti, G, Son, J, Greer, A, Perona, A, Rattanachata, A, Saw, A Y, Bostwick, A, Yang, S, Yang, S-H, Gullikson, E M, Kortright, J B, Stemmer, S, Fadley, C S

“…Standing-wave-excited photoemission is used to study a SrTiO3/LaNiO3 superlattice. Rocking curves of core-level and valence band spectra are used to derive…”
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Superconductor to Mott insulator transition in YBa2Cu3O7/LaCaMnO3 heterostructures by Gray, B. A., Middey, S., Conti, G., Gray, A. X., Kuo, C.-T., Kaiser, A. M., Ueda, S., Kobayashi, K., Meyers, D., Kareev, M., Tung, I. C., Liu, Jian, Fadley, C. S., Chakhalian, J., Freeland, J. W.

“…The superconductor-to-insulator transition (SIT) induced by means such as external magnetic fields, disorder or spatial confinement is a vivid illustration of…”
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Momentum-resolved electronic structure at a buried interface from soft X-ray standing-wave angle-resolved photoemission by Gray, A. X., Minár, J., Plucinski, L., Huijben, M., Bostwick, A., Rotenberg, E., Yang, S.-H., Braun, J., Winkelmann, A., Conti, G., Eiteneer, D., Rattanachata, A., Greer, A. A., Ciston, J., Ophus, C., Rijnders, G., Blank, D. H. A., Doennig, D., Pentcheva, R., Kortright, J. B., Schneider, C. M., Ebert, H., Fadley, C. S.

“…Angle-resolved photoemission spectroscopy (ARPES) is a powerful technique for the study of electronic structure, but it lacks a direct ability to study buried…”
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Band gap and electronic structure of an epitaxial, semiconducting Cr0.80Al0.20 thin film by Boekelheide, Z, Gray, A X, Papp, C, Balke, B, Stewart, D A, Ueda, S, Kobayashi, K, Hellman, F, Fadley, C S

“…Cr(1-x)Al(x) exhibits semiconducting behavior for x = 0.15-0.26. This Letter uses hard x-ray photoemission spectroscopy and density functional theory to…”
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Electronic structure of EuO spin filter tunnel contacts directly on silicon by Caspers, C., Müller, M., Gray, A. X., Kaiser, A. M., Gloskovskii, A., Fadley, C. S., Drube, W., Schneider, C. M.

“…We present an electronic structure study of a magnetic oxide/ semiconductor model system, EuO on silicon, which is dedicated for efficient spin injection and…”
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Emergent phenomena at oxide interfaces studied with standing-wave photoelectron spectroscopy by Kuo, C. -T, Conti, G, Rault, J. E, Schneider, C. M, Nemšák, S, Gray, A. X

“…Emergent phenomena at complex-oxide interfaces have become a vibrant field of study in the past two decades due to the rich physics and a wide range of…”
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Progress toward time-resolved molecular imaging: A theoretical study of optimal parameters in static photoelectron holography by Sun, S. X.-L., Kaduwela, A. P., Gray, A. X., Fadley, C. S.

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Bulk Electronic Structure of Lanthanum Hexaboride (LaB6) by Hard X-ray Angle-Resolved Photoelectron Spectroscopy by Rattanachata, A, Nicolaï, L, Martins, H. P, Conti, G, Verstraete, M. J, Gehlmann, M, Ueda, S, Kobayashi, K, Vishik, I, Schneider, C. M, Fadley, C. S, Gray, A. X, Minár, J, Nemšák, S

“…Phys. Rev. Materials 5, 055002 (2021) In the last decade rare-earth hexaborides have been investigated for their fundamental importance in condensed matter…”
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Tuning band alignment at a semiconductor-crystalline oxide heterojunction via electrostatic modulation of the interfacial dipole by Chrysler, M, Gabel, J, Lee, T. -L, Penn, A. N, Matthews, B. E, Kepaptsoglou, D. M, Ramasse, Q. M, Paudel, J. R, Sah, R. K, Grassi, J. D, Zhu, Z, Gray, A. X, LeBeau, J. M, Spurgeon, S. R, Chambers, S. A, Sushko, P. V, Ngai, J. H

“…Phys. Rev. Materials 5, 104603 (2021) We demonstrate that the interfacial dipole associated with bonding across the SrTiO3/Si heterojunction can be tuned…”
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