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Dr. David Earl Graf

Postdoctoral Associate
Condensed Matter Science, DC Field CMS

Email:
Phone: 850 - 644-3318
Alt. Phone: 850 - 644-2389
Fax: 850 - 644-5038
Address: A-327 NHMFL FSU
1800 E. Paul Dirac Dr.
Tallahassee , FL 32310-3706

Educational Background:
B.S., Physics - 1998 - SUNY College at Buffalo
M.S., Physics - 2001 - Florida State University
Ph.D., Physics - 2005 - Florida State University

Research Interests:
High B/T phenomenon in low-dimensional organic compounds
IV characteristics of density wave ground waves
Magnetotransport and NMR under pressure

Professional Experience:
1997-98: Research Internship in Mossbauer Spectroscopy
Summer 1998: Research Internship at NIST - Gaithersburg, MD
1999-2005: graduate student - FSU
2005-present: posdoctoral fellow



Disclaimer: The information presented below was automatically generated from a database. In the rare instance of an exact name match, it is possible that a citation is inaccurately attributed. The listing should therefore be considered unofficial. To report a mismatched publication, contact IMsystems@magnet.fsu.edu.


Publications and Scientific Activities

##Peer-Reviewed Publications
1 Cui, H.B.; Graf, D.; Brooks, J.S. and Kobayashi, H., Pressure-Dependent Metallic and Superconducting Phases in a Germanium Artificial Metal, Phys. Rev. Lett., 102, 237001-5 (2009)
2 Kano, M.; Kohama, Y.; Graf, D.; Balakirev, F.; Sefat, A.S.; Mcguire, M.A.; Sales, B.C.; Mandrus, D. and Tozer, S.W., Anisotropy of the Upper Critical Field in a Co-Doped BaFe2As2 Single Crystal, J. Phys. Soc. Japan, 78, 084719 (2009) [read online]
3 Purcell, K.M.; Graf, D.; Kano, M.; Bourg, J.; Palm, E.C.; Murphy, T.; McDonald, R.; Mielke, C.H.; Altarawneh, M.M.; Petrovic, C.; Hu, R.; Ebihara, T.; Cooley, J.; Schlottmann, P. and Tozer, S.W., Pressure evolution of a field-induced Fermi surface reconstruction and of the Néel critical field in CeIn3, Phys. Rev. B, 79, 214428 (2009)
4 Graf, D.; Brooks, J.S.; Choi, E.S.; Almeida, M.; Henriques, R.T.; Dias, J.C. and Uji, S., Quantum interference in the quasi-one-dimensional organic conductor (Per)2Au(mnt)2, Phys. Rev. B, 75, 245101 (2007) [read online]
5 Brooks, J.S.; Graf, D.; Choi, E.S.; Almeida, M.; Dias, J.C.; Henriques, R.T. and Matos, M., Magnetic field dependence of CDW phases in (Per)(2)M(mnt)(2) (M = Pt, Au), J. Low Temp. Phys., 142, 787 (2006)
6 Brooks, J.S.; Williams, V.; Choi, E.; Graf, D.; Tokumoto, M.; Uji, S.; Zuo, F.; Wosnitza, J.; Schlueter, J. A.; Davis, H.; Winter, R.W.; Gard, G.L. and Storr, K., Fermiology and superconductivity at high magnetic fields in a completely organic cation radical salt, New Journal of Physics, 8, 25 (2006)
7 Graf, D.; Choi, E.S.; Brooks, J.S. and Almeida, M., Pressure-induced quantum limit in a Q1D system in high magnetic fields, J. Low Temp. Phys., 142, 179 (2006)
8 Uji, S.; Terashima, T.; Nishimura, M.; Takahide, Y.; Konoike, T.; Enomoto, K.; Cui, H.; Kobayashi, H.; Kobayashi, A.; Tanaka, H.; Tokumoto, M.; Choi, E-S.; Tokumoto, T.; Graf, D. and Brooks, J.S., Vortex dynamics and the Fulde-Ferrell-Larkin-Ovchinnikov state in a magnetic-field-induced organic superconductor, Phys. Rev. Lett., 97, 157001 (2006)
9 Brooks, J.S.; Graf, D.; Oshima, Y.; Choi, E.S.; Murata, K.; Konoike, T. and Papavassiliou, G., Magnetic, thermoelectric, and pressure studies of the magnetic field-induced metal to insulator transition in tau-phase organic conductors, Synthetic Met., 152, 441 (2005)
10 Graf, D.; Choi, E.S.; Brooks, J.S.; Dias, J.C.; Henriques, R.T.; Almeida, M.; Matos, M. and Rickel, D., Charge Density Wave to Mixed Density Wave Phase Transition at High Fields in (Per)2M(mnt)2 (M = Au, Pt), Synthetic Met., 153, 361 (2005)
11 Graf, D.; Choi, E.S.; Brooks, J.S.; Harrison, N.; Murata, K.; Konoike, T.; Mousdis, G.A. and Papavassiliou, G.C., Magnetization, thermoelectric, and pressure studies of the magnetic-field-induced metal-insulator transition in tau-phase organic conductors, Phys. Rev. B, 71, 045117 (2005)
12 Nakanishi,T.; Li L.; Yoshino, H.; Yasuzuka, S.; Graf, D.; Choi, E.S.; Brooks, J.S.; Papavassiliou,G.C. and Murata, K., Is the resistance upturn around 50 K related to the Fermi surface area in tau-(EDO-R, R-DMEDT-TTF)2(AuBr2)1+y, Synthetic Met., 152, 425 (2005)
13 Tokumoto, T.; Brooks, J.S.; Graf, D.; Choi, E.S.; Biskup, N.; Eaton, D.L.; Anthony J.E. and Odom, S.A., Persistent photo-excited conducting states in functionalized pentacene, Synthetic Met., 152, 449 (2005)
14 Uji, S.; Yasuzuka, S.; Konoike, T.; Enomoto, K.; Yamada, J.; Choi, E.S.; Graf, D. and Brooks, J.S., Quantum oscillation of Hall resistance in the extreme quantum limit of an organic conductor (TMTSF)2ClO4, Phys. Rev. Lett., 94, 077206 (2005)
15 Uji, S.; Yasuzuka, S.; Tokumoto, M.; Tanaka, H.; Kobayashi, A.; Zhang, B.; Kobayashi, H.; Choi, E.S.; Graf, D. and Brooks, J.S., Magnetic-field-induced superconductivity and phase diagrams of lambda-(BETS)2FeCl4-xBrx, Phys. Rev. B, 72, 184505 (2005)
16 Yasuzuka, S.; Uji, S.; Enomoto, K.; Konoike, T.; Nishimura, M.; Terashima, T.; Graf, D.; Choi, E.S.; Brooks, J.S. and Yamamoto, H.M., Pressure Effect on Fermi Surface in β"-(ET)(TCNQ), Synthetic Met., 152, 437 (2005)
17 Yoshino, H.; Murata, K.; Nakanishi, T.; Li, L.; Choi, E.S.; Graf, D.; Brooks, J.S.; Nogami, Y. and Papavassiliou, G.C., Determination of band-filling change in the two-dimensional organic conductor, tau-(EDO-S, S-DMEDT-TTF)2(AuBr2)1+y by the quantum oscillation of magnetoresistance, J. Phys. Soc. Japan, 74, 417 (2005)
18 Yoshino, H.; Nakanishi,T.; Li, L.; Murata, K.; Graf, D.; Choi, E.S.; Brooks, J.S.; Nogami Y. and Papavassiliou, G.C., Evidence of band-filling control of τ−type organic conductors by thermal treatment, Synthetic Met., 153, 453 (2005)
19 Brooks, J.S.; Tokumoto, T.; Choi, E.S.; Graf, D.; Biskup, N.; Eaton, D.L.; Anthony, J.E. and Odom, S.A., Persistent photoexcited conducting states in functionalized pentacene, J. Appl. Phys., 96, 3312 (2004)
20 Brooks, J.S.; Vasic, R.; Tokumoto, T.; Graf, D.; Chung, O.H.; Anthony, J.E. amd Odom, S.A., Transport and melt processing in functionalized pentacene with ‘organic wire connections’, Current Appl. Phys., 4, 479-483 (2004)
21 Choi, E.S.; Graf, D.; Brooks, J.S.; Yamada, J. and Tokumoto, M., The pressure-temperature phase diagram of pressure induced organic superconductors beta-(BDA-TTP)2MCl4 (M=Ga, Fe), J. de Physique IV, 114, 297 (2004)
22 Choi, E.S.; Graf, D.; Brooks, J.S.; Yamada, J.; Akutsu, H.; Kikuchi, K. and Tokumoto, M., Pressure-dependent ground states and fermiology in beta-(BDA-TTP)2MCl4(M=Ga, Fe), Phys. Rev. B, 70, 024517 (2004)
23 Graf, D.; Brooks, J.S.; Choi, E.S.; Uji, S.; Dias, J.C.; Almeida, M. and Matos, M., Suppression of a charge-density-wave ground state in high magnetic fields: Spin and orbital mechanisms, Phys. Rev. B, 69, 125113 (2004)
24 Graf, D.; Choi, E.S.; Brooks, J.S.; Matos, M.; Henriques, R.T. and Almeida, M., High magnetic field charge density wave state in a quasi-one-dimensional organic conductor, Phys. Rev. Lett., 93, 076406 (2004)
25 Papavassiliou, G.C.; Mousdis, G.A.; Anyfantis, G.C.; Murata, K.; Li, L.; Yoshini, H.; Tajima, H.; Konoike, T.; Brooks, J.S.; Graf, D. and Choi, E.S., Structural and Physical Properties of tau-(EDO-S,S-DMEDT-TTF)2(AuBr2)1+y and tau-(P-S,S-DMEDT-TTF)2(AuBr2)1+y, Z. Naturforsch, 59a, 952 (2004)
26 Tanaka, H.; Tokumoto, M.; Ishibashi, S.; Graf, D.; Choi, E.S.; Brooks, J.S.; Yasuzuka, S.; Okano, Y.; Kobayashi, H. and Kobayashi, A., Observation of three-dimensional Fermi surface in a single-component molecular metal, [Ni(tmdt)2], J. Am. Chem. Soc., 126, 10518 (2004)
27 Uji, S.; Yasuzuka, S.; Tanaka, H.; Tokumoto, M.; Zhang, B.; Kobayashi, H.; Choi, E.S.; Graf, D. and Brooks, J.S., Phase diagram of magnetic-field-induced superconductor lambda-(BETS)2FexCl4-xBr4, J. de Physique IV, 114, 391 (2004)
28 Yasuzuka, S.; Graf, D.; Choi, E.S.; Brooks, J.S.; Terashima, T.; Konoike, T.; Enomoto, K.; Nishimura, M.; Yamamoto, H.M.; Kato, R. and Uji, S., Pressure-induced Fermi surface change in quasi-one-dimensional conductor beta''-(ET)(TCNQ), J. de Physique IV, 114, 157 (2004)
29 Brooks, J.S.; Graf, D.; Choi, E.S.; Balicas, L.; Storr, K.; Mielke, C.H. and Papavassiliou, G.C., High-magnetic-field-induced insulating phase in an organic conductor, Phys. Rev. B, 67 (15), 153404 (2003) [read online]
30 Iwashita, K.; Yamamoto, H.M.; Yoshino, H.; Graf, D.; Storr, K.; Rutel, I.; Brooks, J.S.; Takahashi, T. and Murata, K., Uniaxial strain dependence of electronic states of theta-(BEDT-TTF)2MZn(SCN)4 [M = Cs, Rb], Synthetic Met., 133, 153-155 (2003) [read online]
31 Konoike, T.; Iwashita, K.; Nakano, I.; Yoshino, H.; Sasaki, T.; Nogami, Y.; Brooks, J.S.; Graf, D.; Mielke, C.H.; Papavassiliou, G.C.; et al., Shubnikov-de Haas oscillations and Fermi surface of tau-phase conductors, Physica E, 18 (1-3), 188-189 (2003)
32 Murata, K.; Iwashita, K.; Mizuno, Y.; Guo, F.Z.; Shodai, S.; Yoshino, H.; Brooks, J.S.; Balicas, L.; Graf, D.; Storr, K.; Rutel, I.; Uji, S.; Terakura, C. and Yamanaka, Y., Spin-density wave under uniaxial strain in (TMTSF)2PF6, Synthetic Met., 1-4, 51 (2003) [read online]
33 Yamada, J.; Toita, T.; Akutsu, H.; Nakatsuji, S.; Nishikawa, H.; Ikemoto, I.; Kikuchi, K.; Choi, E.S.; Graf, D. and Brooks, J.S., A new organic superconductor, beta-(BDA-TTP)2GaCl4 [BDA-TTP=2,5-(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene]., Chem. Commun. (Camb.), 17, 2230 (2003)
34 Graf, D.; Balicas, L.; Brooks, J.S.; Mielke, C. and Papavassiliou, G.C., Magnetic-Field-Induced Density Wave Transition in a tau-phase Organic Conductor, Int. J. Mod. Phys. B, 16 (21-22), 3105 (2002)
35 Murata, K.; Iwashita, K.; Mizuno, Y.; Guo, F.Z.; Shodai, S.; Yoshinoa, H.; Brooks, J.S.; Balicas, L.; Graf, D.; Storr, K.; Rutel, I.; Uji, S.; Terakura, C. and Imanaka, Y., Uniaxial strain and anisotropy in the spin density wave in(TMTSF)2PF6, J. Phys. Chem. Solids, 63 (6-8), 1263-1265 (2002) [read online]
36 Balicas, L.; Brooks, J.S.; Storr, K.; Graf, D.; Uji, S.; Shinagawa, H.; Ojima, E.; Fujiwara, H.; Kobayashi, H.; Kobayashi, A. and Tokumoto, M., Shubnikov-de Haas effect and Yamaji oscillations in the antiferromagnetically ordered organic superconductor k -(BETS)2FeBr4: a fermiology study, Solid State Commun., 116, 557-562 (2000) [read online]
##Presentations, Posters & Abstracts
1 Tokumoto, T.; van Tol, J.; Brunel, L.C.; Graf, D.; Brooks, J.S.; Oshima, Y. and Papavassiliou, G., High field ESR on tau phase conductor -- from GHz to THz-, American Physical Society March Meeting, New Orleans, LA, March 10-14 (2008); Published in Bulletin of the American Physical Society, 53 (2 B12.3) (2008)
2 Graf, D.; Brooks, J. S.; Choi, E. S.; Uji, S.; Dias, J. C.; Matos, M.; Henriques, R. T.; Almeida, M, Are there Lebed Magic Angles in the Angular Dependence of (Per)2Au(mnt)2?, International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets, Peniscola, Spain, September 24-29 (2007)
3 Graf, D.; Brooks, J. S.; Choi, E. S.; Uji, S.; Dias, J. C.; Matos, M.; Henriques, R. T.; Almeida, M., Angular Dependent Fermi Surface Effects of (Per)2Au(mnt)2 Under Pressure, American Physical Society March Meeting, Denver, CO, March 5-9 (2007)
4 Graf, D.; Brooks, J. S.;, An Introduction to the NHMFL and High B/T Measurements on Low-Dimensional Organic Materials, Buffalo State College, Buffalo, NY, March 29 (2007)
5 Tokumoto, T.; Oshima, Y.; Graf, D.; Brooks, J.S.; Van Tol, J.; Brunel, L.C. and Papavassiliou, G., Multiple spin sites in an organic conductor without magnetic ions, American Physical Society March Meeting, Baltimore, MD, March 13-17 (2006)
6 Graf, D.; Choi, E.S.; Brooks, J.S.; Henriques, R.T. and Almeida, M., Quantum Limit in a Quasi-One-Dimensional System Under Pressure, Sixth International Symposium on Crystalline Organic Metals, Superconductors, and Ferromagnets (ISCOM), Key West, FL, Sept. (2005); Published in Synthetic Met. (0)
7 Graf, D.; Choi, E.S.; Brooks, J.S.; Henriques, R.T. and Almeida, M., Quantum Limit in a Quasi-One-Dimensional System Under Pressure, Physical Phenomenon in High Magnetic Fields (PPHMF-V), Tallahassee, FL, August (2005)
8 Tokumoto, T.; Oshima, Y.; Choi, E.S.; Graf, D.; Brooks, J.S.; Yamada, J.; Akutsu. H. and Tokumoto, M., Observation of the exchange narrowing in the pi-d correlated organic conductors, Physical Phenomena at High Magnetic Fields - V, Tallahassee, FL, 08/05/05 (2005)
9 Tokumoto, T.; Oshima, Y.; Graf, D.; Brooks, J.S.; Van Tol, J.; Brunel, L.C. and Papavassiliou, G., What is the origin of multiple spin sites in an organic conductor without magnetic ions?, 34th Southeastern Magnetic Resonance Cinference, Emory Univ. at Atlanta, GA, November 11-13 (2005)
10 Graf, D.; Choi, E.S.; Brooks, J.S.; Henriques, R.T. and Almeida, M., Charge Density Wave to Mixed Density Wave Phase Transition at High Fields, International Conference of Synthetic Metals (ICSM), Wollongong, NSW, Australia, June (2004); Published in Synthetic Met., 153 (1-3), 361 (2005)
11 Graf, D.; Brooks, J.S. and Papavassiliou, G.C., Metal-insulator transition at very high magnetic fields in an organic conductor, APS March Meeting, Austin, TX, March (2003)
12 Balicas, L.; Brooks, J.S.; Storr, K; Graf, D.; Uji, S.; Shinagawa, H.; Ojima, E.; Fujiwara, H.; Kobayashi, H.; Kobayashi, A. and Tokumoto, M.,, Shubnikov-de Haas Effect and Yamaji Oscillations in the Antiferromagnetically Ordered Organic Superconductor k-(BETS)2FeBr4: A Fermiology Study, 2001 APS March Meeting, Seattle, WA, March 12-16 (2001) [read online]
13 Graf, D.; Balicas, L.; Brooks, J.S.; Mielke, C. and Papavassiliou, G.C., Magnetic-field induced transition in tau phase organic conductor, Physical Phenomena at High Magnetic Fields - IV, Santa-Fe, NM, October (2001)
##Theses
1 Graf, D., "Magnetic Field-Dependent Electronic Structures of Low-Dimensional Organic Materials", Florida State University - Physics, advisor: Dr. James Brooks (2005)
##Grants
1 PI: Graf, D.,
 Grant Title: Florida State University Dissertation Grant
 Agency: FSU
 Project Dates: 9/1/02 - 9/1/05
 Award Amount: $500




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