Hamlin Laboratory

Science of materials under extreme conditions

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Research

Our group's research is directed towards utilizing a combination of materials synthesis, ambient pressure characterization, and high pressure and high magnetic field measurements to advance our understanding of novel and potentially useful electronic and magnetic materials. In particular, we study the formation of unconventional and/or high temperature superconducting states in the vicinity of quantum phase transitions, although in the course of characterizing new materials, other phenomena are also investigated.

My group is alway on the lookout for motivated graduate students. Please send me an email if you are interested.

Publications

85. Vector graphics extraction and analysis of electrical resistance data in Nature volume 586, pages 373-377 (2020)
    J. J. Hamlin
    arXiv:2210.10766 (2022)

84. Pressure-induced superconductivity in the weak topological insulator Bi₂TeI and the topological metal Bi₃TeI
    T. A. Elmslie, D. VanGennep, R. N. Baten, J. Downing, W. Bi, S. T. Weir, Y. K. Vohra, R. E. Baumbach, J. J. Hamlin
    arXiv:2209.02688 (2022)

83. Tuning the Magnetic Properties of the CrMnFeCoNi Cantor Alloy
    Timothy A. Elmslie, Jacob Startt, Yang Yang, Sujeily Soto-Medina, Emma Zappala, Mark W. Meisel, Michele V. Manuel, Benjamin A. Frandsen, Rémi Dingreville, James J. Hamlin
    arXiv:2208.09537 (2022)

82. High critical field superconductivity at ambient pressure in MoB₂ stabilized in the P6/mmm structure via Nb substitution
    A. C. Hire, S. Sinha, J. Lim, J. S. Kim, P. M. Dee, L. Fanfarillo, J. J. Hamlin, R. G. Hennig, P. J. Hirschfeld, and G. R. Stewart
    Phys. Rev. B. 106, 174515 (2022)

81. Creating superconductivity in WB₂ through pressure-induced metastable planar defects
    J. Lim, A. C. Hire, Y. Quan, J. S. Kim, S. R. Xie, S. Sinha, R. S. Kumar, D. Popov, C. Park, R.J. Hemley, J. J. Hamlin, R. G. Hennig, P. J. Hirschfeld, G. R. Stewart
    Nat. Commun. 13, 7901 (2022)

80. Magnetic properties of equiatomic CrMnFeCoNi
    Timothy A. Elmslie, Jacob Startt, Sujeily Soto-Medina, Yang Yang, Keke Feng, Ryan E. Baumbach, Emma Zappala, Gerald D. Morris, Benjamin A. Frandsen, Mark W. Meisel, Michele V. Manuel, Rémi Dingreville, and James J. Hamlin
    Phys. Rev. B 106, 014418 (2022)

79. The 2021 room-temperature superconductivity roadmap
    Boeri Lilia, Richard Hennig, Peter Hirschfeld, Gianni Profeta, Antonio Sanna, Eva Zurek, Warren E Pickett, Maximilian Amsler, Ranga Dias, Mikhail I Eremets, Christoph Heil, Russell J Hemley, Hanyu Liu, Yanming Ma, Carlo Pierleoni, Aleksey N Kolmogorov, Nikita Rybin, Dmitry Novoselov, Vladimir Anisimov, Artem R Oganov, Chris J Pickard, Tiange Bi, Ryotaro Arita, Ion Errea, Camilla Pellegrini, Ryan Requist, E K U Gross, Elena Roxana Margine, Stephen R Xie, Yundi Quan, Ajinkya Hire, Laura Fanfarillo, G R Stewart, J J Hamlin, Valentin Stanev, Renato S Gonnelli, Erik Piatti, Davide Romanin, Dario Daghero, and Roser Valenti
    J. Phys.: Condens. Matter 34 183002 (2022)

78. Machine learning of superconducting critical temperature from Eliashberg theory
    S. R. Xie, Y. Quan, A. C. Hire, B. Deng, J. M. DeStefano, I. Salinas, U. S. Shah, L. Fanfarillo, J. Lim, J. Kim, G. R. Stewart, J. J. Hamlin, P. J. Hirschfeld, and R. G. Hennig
    npj Computational Materials 8, 14 (2022)

77. Absence of superconductivity in topological metal ScInAu₂ J.M. DeStefanoa, G.P.Marciaga, J.B.Flahavan, U.S.Shah, T.A.Elmslie, M.W.Meisel, and J.J.Hamlin
    Physica C 589, 1353928 (2021)

76. High-pressure study of the low- Z rich superconductor Be₂₂Re
    J. Lim, A. C. Hire, Y. Quan, J. Kim, L. Fanfarillo, S. R. Xie, R. S. Kumar, C. Park, R. J. Hemley, Y. K. Vohra, R. G. Hennig, P. J. Hirschfeld, G. R. Stewart, and J. J. Hamlin
    Phys. Rev. B 104, 064505 (2021)

75. A15 Nb₃Si: a `high' Tc superconductor synthesized at a pressure of one megabar and metastable at ambient conditions
    Jinhyuk Lim, J S Kim, Ajinkya C Hire, Yundi Quan, R G Hennig, P J Hirschfeld, J J Hamlin, G R Stewart and Bart Olinger
    J. Phys.: Condens. Matter 33, 285705 (2021)

74. Pressure-induced suppression of ferromagnetism in CePd₂P₂
    T. A. Elmslie, D. VanGennep, W. Bi, Y. Lai, S. T. Weir, Y. K. Vohra, R. E. Baumbach, and J. J. Hamlin
    Phys. Rev. B 102, 125146 (2020)

73. Be₅Pt Properties of a novel pseudogapped semimetal
    L. Fanfarillo, J.J. Hamlin, R.G. Hennig, Ajinkya Hire, P.J. Hirschfeld, Jungsoo Kim, Jinhyuk Lim, Yundi Quan, G.R. Stewart, Stephen R. Xie
    Phys. Rev. B, 102, 155206 (2020)

72. Extreme diamond-based quantum sensors
    J. J. Hamlin and B. B. Zhou
    Science 366, 1312 (2019) (Perspective)

71. Superconductivity near room temperature
    J. J. Hamlin
    Nature 569, 491 (2019) (News and Views)

70. Functional form of the superconducting critical temperature from machine learning
    S. R. Xie, G. R. Stewart, J. J. Hamlin, P. J. Hirschfeld, and R. G. Hennig
    Phys. Rev. B 100, 174513 (2019)

69. Possible pressure-induced topological quantum phase transition in the nodal line semimetal ZrSiS
    D. VanGennep, T. A. Paul, C. W. Yerger, S. T. Weir, Y. K. Vohra, and J. J. Hamlin
    Phys. Rev. B 99, 085204 (2019)

68. Unusual effects of Be doping in the iron-based superconductor FeSe
    S. Kim, D. VanGennep, J. J. Hamlin, X. Wang, A. S. Sefat, and G. R. Stewart
    J. Phys.: Condens. Matter 30, 445701 (2018)

67. High pressure Raman, optical absorption and resistivity study of SrCrO₄
    M. Hakeem, D. Jackson, J. Hamlin, D. Errandonea, J. Proctor, M. Bettinelli
    Inorg. Chem. 57, 7550 (2018)

66. Superconducting and magnetic phase diagram of RbEuFe₄As₄ and CsEuFe₄As₄ at high pressure
    D. E. Jackson, D. VanGennep, W. Bi, D. Zhang, P. Materne, Y. Liu, G.-H. Cao, S. T. Weir, Y. K. Vohra, J. J. Hamlin
    Phys. Rev. B 98, 014518 (2018)

65. Superconductivity of barium-VI synthesized via compression at low temperatures
    D. E. Jackson, D. VanGennep, Y. K. Vohra, S. T. Weir, and J. J. Hamlin
    Phys. Rev. B 96, 184514 (2017)

64. Influence of Pressure on the Magnetic Response of the Low-Dimensional Quantum Magnet Cu(H₂O)₂(C₂H₈N₂)SO₄
    M. K. Peprah, D. VanGennep, B. D. Blasiola, P. A. Quintero, R. Tarasenko, J. S. Xia, J. J. Hamlin, M. W. Meisel, and A. Orendáčová
    Acta Physica Polenica A 131, 901 (2017)

63. Evolution of the Fermi surface of BiTeCl with pressure
    D. VanGennep, D. E. Jackson, D. Graf, H. Berger, and J. J. Hamlin
    J. Phys.: Condens. Matter 29, 295702 (2017)

62. Pressure-induced superconductivity in the giant Rashba system BiTeI
    D. VanGennep, A. Linscheid, D. E. Jackson, S. T. Weir, Y. K. Vohra, H. Berger, G. R. Stewart, R. G. Hennig, P. J. Hirschfeld, J. J. Hamlin
    J. Phys.: Condens. Matter Letters 29, 09LT02 (2017)

61. Pressure-tuning of the photomagnetic response of heterostructured CoFe@ CrCr-PBA core@ shell nanoparticles
    M. K. Peprah, D. VanGennep, P. A. Quintero, O. N. Risset, T. V. Brinzari, C. H. Li, M. F. Dumont, J-s. Xia, J. J. Hamlin, D. R. Talham, M. W. Meisel
    Polyhedron 123, 323 (2017)

60. Frustrated magnetism in the spin-chain metal Yb₂Fe₁₂P₇
    R. E. Baumbach, J. J. Hamlin, M. Janoschek, J. Singleton, M. B. Maple
    J. Phys.: Condens. Matter, 28, 046004 (2016)

59. Superconductivity in the metallic elements at high pressures
    J. J. Hamlin
    Physica C, 514, 59 (2015) - invited review article

58. Pressure dependence of the charge-density-wave and superconducting states in GdTe₃, TbTe₃, and DyTe₃
    D. A. Zocco, J. J. Hamlin, K. Grube, J. H. Chu, H. H. Kuo, I. R. Fisher, M. B. Maple
    Phys. Rev. B, 91, 205114 (2015)

57. Persistent non-metallic behavior in Sr₂IrO₄ and Sr₃Ir₂O₇ at high pressures
    D. A. Zocco, J. J. Hamlin, B. D. White, B. J. Kim, J. R. Jeffries, S. T. Weir, Y. K. Vohra, J. W. Allen
    J. Phys.: Condens. Matter, 25, 255603, (2014)

56. Pressure-tuning the Fermi level through the Dirac point of giant Rashba semiconductor BiTeI
    D. VanGennep, S. Maiti, D. Graf, S. W. Tozer, C. Martin, H. Berger, D. L. Maslov, and J.~J. Hamlin
    J. Phys.: Condens. Matter (Fast Track Communication), 26, 342202, (2014)

55. Electrical resistivity of single crystals of LaFeAsO under applied pressure
    C. A. McElroy, J. J. Hamlin, B. D. White, S. T. Weir, Y. K. Vohra, and M. B. Maple
    Phys. Rev. B, 90, 125134, (2014)

54. Pressure-induced superconductivity in LaFeAsO: The role of anionic height and magnetic ordering
    R. S. Kumar, J. J. Hamlin, M. B. Maple, Y. Zhang, C. Chen, J. Baker, A. L. Cornelius, Y. Zhao, Y. Xiao, S. Sinogeikin, and P. Chow
    Applied Physics Letters, 105, 251902, (2014)

53. Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇
    S. Jang, B. D. White, P. C. Ho, N. Kanchanavatee, M. Janoschek, J. J. Hamlin, and M. B. Maple
    J. Phys.: Condens. Matter 26, 425601, (2014)

52. Probing the superconductivity of PrPt₄Ge₁₂ through Ce substitution
    K. Huang, L. Shu, I. K. Lum, B. D. White, M. Janoschek, D. Yazici, J. J. Hamlin, D. A. Zocco, P.-C. Ho, R. E. Baumbach, M. B. Maple
    Phys. Rev. B 89, 035145 (2014)

51. Tuning the band gap of PbCrO₄ through high-​pressure. Evidence of wide-​to-​narrow semiconductor transitions
    D. Errandonea, E. Bandiello, A. Segura, J. J. Hamlin, M. B. Maple, P. Rodriguez-Hernandez, A. Munoz
    J. Alloys Compd. 587, 14 (2014)

50. Magnetotransport properties of single-​crystalline LaFeAsO
    C. A. McElroy, J. J. Hamlin, B. D. White, M. A. McGuire, B. C. Sales, M. B. Maple
    Phys. Rev. B 88, 134513 (2013)

49. Pressure-Induced Unconventional Superconducting Phase in the Topological Insulator Bi₂Se₃
    K. Kirshenbaum, P. S. Syers, A. P. Hope, N. P. Butch, J. R. Jeffries, S. T. Weir, J. J. Hamlin, M. B. Maple, Y. K. Vohra, J. Paglione
    Phys. Rev. Lett. 111, 087001 (2013)

48. Ferromagnetic quantum critical point in UCo_1-xFe_xGe
    K. Huang, J. J. Hamlin, R. E. Baumbach, M. Janoschek, N. Kanchanavatee, D. A. Zocco, F. Ronning, and M. B. Maple
    Phys. Rev. B 87, 054513 (2013)

47. Dependence of the superconducting transition temperature of the filled skutterudite compound PrPt₄Ge₁₂ on hydrostatic pressures
    N. Foroozani, J. J. Hamlin, J. S. Schilling, R. E. Baumbach, I. K. Lum, L. Shu, K. Huang, and M. B. Maple
    Physica C 485, 160 (2013)

46. Thermoelectric Properties of Correlated Electron Systems Ln₃Pt₄Ge₆ and LnPt₄Ge₁₂ (Ln = Ce, Pr) and Non-centrosymmetric X₂T₁₂P₇ (X = Yb, Hf and T = Fe, Co)
    B. D. White, M. Janoschek, N. Kanchanavatee, K. Huang, L. Shu, S. Jang, D. Y. Tutun, J. J. Hamlin, I. K. Lum, R. E. Baumbach, M. B. Maple
    New Materials for Thermoelectric Applications: Theory and Experiment NATO Science for Peace and Security Series B: Physics and Biophysics pp 31-43 (2013)

45. Intrinsic dependence of T_c on hydrostatic (He-gas) pressure for superconducting LaFePO, PrFePO, and NdFePO single crystals
    N. J. Hillier, N. Foroozani, D. A. Zocco, J. J. Hamlin, R. E. Baumbach, I. K. Lum, M. B. Maple, and J. S. Schilling
    Phys. Rev. B 86, 214517 (2012)

44. Electronic, magnetic, and electric transport properties of Ce₃Rh₄Sn₁₃ and Ce₃Co₄Sn₁₃: A comparative study
    A. Slebarski, B. D. White, M. Fijalkowski, J. Goraus, J. J. Hamlin, and M. B. Maple
    Phys. Rev. B 86, 205113 (2012)

43. Insensitivity of the pressure dependences of characteristic energy scales in Ce_1-xR_xCoIn₅ (R = Yb, Y, Gd) to the electronic configuration of the rare-earth ion
    B. D. White, J. J. Hamlin, K. Huang, L. Shu, I. K. Lum, R. E. Baumbach, M. Janoschek, and M. B. Maple
    Phys. Rev. B 86, 100502(R) (2012), (Editor's Suggestion)

42. High pressure transport studies of the LiFeAs analogs CuFeTe₂ and Fe₂As
    D. A. Zocco, D. Y. Tutun, J. J. Hamlin, J. R. Jeffries, S. T. Weir, Y. K. Vohra, and M. B. Maple
    SUST 25, 84018 (2012)

41. Superconducting and magnetic anisotropy of LnFePO (Ln = La, Pr, and Nd) single crystals
    R. E. Baumbach, J. J. Hamlin, P.-C. Ho, I. K. Lum, M. B. Maple
    Phys. Rev. B 85, 104526 (2012)

40. Superconductivity, spin and charge order and quantum criticality in correlated electron materials
    M. B. Maple, J. J. Hamlin, D. A. Zocco, M. Janoschek, R. E. Baumbach, B. D. White, I. R. Fisher, J.-H. Chu
    EPJ Web of Conferences, 23, 00012 (2012)

39. Transport, magnetic, and thermal properties of non-centrosymmetric Yb₂Co₁₂P₇
    J. J. Hamlin, M. Janoschek, R. E. Baumbach, B. D. White, and M. B. Maple
    Phil. Mag. 92, 647 (2012)

38. High pressure transport properties of the topological insulator Bi₂Se₃
    J. J. Hamlin, J. R. Jeffries, N. P. Butch, P. Syers, D. A. Zocco, S. T. Weir, Y. K. Vohra, J. Paglione, M. B. Maple
    J. Phys.: Condens. Matter 24, 035602 (2012)

37. Two-fold enhancement of the ``hidden order''/large moment antiferromagnetic phase boundary in the URu_2-xFe_xSi₂ N. Kanchanavatee, M. Janoschek, R. E. Baumbach, J. J. Hamlin, D. A. Zocco, K. Huang, and M. B. Maple
    Phys. Rev. B 84, 245122 (2011)

36. Low-temperature electrical resistivity of praseodymium at pressures up to 120 GPa
    J. J. Hamlin, J. R. Jeffries, G. Samudrala, Y. K. Vohra, S. T. Weir, D. A. Zocco, and M. B. Maple
    Phys. Rev. B 84, 033101 (2011)

35. Correlated Electron State in Ce_1-xYb_xCoIn₅ Stabilized by Cooperative Valence Fluctuations
    L. Shu, R. E. Baumbach, M. Janoschek, E. Gonzales, K. Huang, T. A. Sayles, J. Paglione, J. O'Brien, J. J. Hamlin, D. A. Zocco, P.-C. Ho, C. A. McElroy, and M. B. Maple
    Phys. Rev. Lett. 106, 156403 (2011)

34. Search for pressure induced superconductivity in CeFeAsO and CeFePO iron pnictides
    D. A. Zocco, R. E. Baumbach, J. J. Hamlin, M. Janoschek, I. K. Lum, M. A. McGuire, A. S. Sefat, B. C. Sales, R. Jin, D. Mandrus, J. R. Jeffries, Y. K. Vohra, S. T. Weir, and M. B. Maple
    Phys. Rev. B 83, 094528 (2011)

33. Magnetic, thermal, and transport properties of the actinide based noncentrosymmetric compounds Th₂Fe₁₂P₇ and U₂Fe₁₂P₇
    R. E. Baumbach, J. J. Hamlin, M. Janoschek, I. K. Lum, and M. B. Maple
    J. Phys.: Condens. Matter 23, 094222 (2011)

32. The noncentrosymmetric heavy fermion ferromagnet Sm₂Fe₁₂P₇
    M. Janoschek, R. E. Baumbach, J. J. Hamlin, I. K. Lum, and M. B. Maple
    J. Phys.: Condens. Matter 23, 094221 (2011)
    

31. Evolution of magnetic and superconducting states in UCoGe with Fe and Ni Substitution
    J. J. Hamlin, R. E. Baumbach, K. Huang, M. Janoschek, N. Kanchanavatee, D. A. Zocco, and M. B. Maple
    Mater. Res. Soc. Symp. Proc. 1264, Z12-04 (2010)i

30. The pressure-temperature phase diagram of URu₂Si₂ under hydrostatic conditions
    N. P. Butch, J. R. Jeffries, W. J. Evans, S. Chi, J. B. Leão, J. W. Lynn, S. V. Sinogeikin, J. J. Hamlin, D. A. Zocco, and M. B. Maple
    Mater. Res. Soc. Symp. Proc. 1264, Z10-03 (2010)
    

29. Pressure-induced superconductivity in europium metal
    M. Debessai, T. Matsuoka, J. J. Hamlin, W. Bi, Y. Meng, K. Shimizu, and J. S. Schilling
    J. Phys. Conf. Ser. 215, 012034 (2010)

28. Unconventional T-H phase diagram in the noncentrosymmetric compound Yb₂Fe₁₂P₇
    R. E. Baumbach, J. J. Hamlin, L. Shu, D. A. Zocco, J. R. O'Brien, P.-C. Ho, and M. B. Maple
    Phys. Rev. Lett. 105, 106403 (2010)

27. Non-Fermi liquid regimes and superconductivity in the low temperature phase diagrams of strongly correlated d- and f-electron materials
    M. B. Maple, R. E. Baumbach, N. P. Butch, J. J. Hamlin, and M. Janoschek
    J. Low Temp. Phys. 161, 4 (2010)

26. Superconductivity for CaC₆ to 32 GPa hydrostatic pressure
    M. Debessai, J. J. Hamlin, J. S. Schilling, D. Rosenmann, D. G. Hinks, and H. Claus
    Phys. Rev. B 82, 132502 (2010)

25. New correlated electron physics from new materials
    M. B. Maple, R. E. Baumbach. J. J. Hamlin, D. A. Zocco, B. J. Taylor, N. P. Butch, J. R. Jeffries, S. T. Weir, B. C. Sales, D. Mandrus, M. A. McGuire, A. S. Sefat, R. Jin, Y. K. Vohra, J. -H. Chu, and I. R. Fisher
    Physica B 404, 2924 (2009)

24. Strongly correlated electron phenomena in the filled skutterudites
    M. B. Maple, R. E. Baumbach, J. J. Hamlin, P.-C. Ho, L. Shu, D. E. MacLaughlin, Z. Henkie, R. Wawryk, T. Cichorek, and A. Pietraszko
    Properties and applications of thermoelectric materials. Nato science for peace and security series, Springer. V. Zlatic and A. C. Hewson eds. (2009)

23. Electronic correlations in the iron pnictides
    M. M. Qazilbash, J. J. Hamlin, R. E. Baumbach, L. Zhang, D. J. Singh, M. B. Maple, and D. N. Basov
    Nature Phys. 5, 647 (2009)

22. High-pressure, transport, and thermodynamic properties of CeTe₃
    D. A. Zocco, J. J. Hamlin, T. A. Sayles, M. B. Maple, J. -H. Chu, and I. R. Fisher
    Phys. Rev. B 79, 134428 (2009)

21. Superconductivity in LnFePO (Ln = La, Pr, and Nd) single crystals
    R. E. Baumbach, J. J. Hamlin, L. Shu, D. A. Zocco, N. M. Crisosto, and M. B. Maple
    New J. Phys. 11, 025018 (2009)

20. Pressure-Induced Superconducting State of Europium Metal at Low Temperatures
    M. Debessai, T. Matsuoka, J. J. Hamlin, J. S. Schilling, and K. Shimizu
    Phys. Rev. Lett. 102, 197002 (2009)
    This paper has been retracted: Phys. Rev. Lett. 127, 269902 (2021).
    I describe the nature of the retraction here: MagX talk (2023).

19. Pressure induced superconducting phase in the charge density wave compound terbium tritelluride
    J. J. Hamlin, D. A. Zocco, T. A. Sayles, M. B. Maple, J. -H. Chu, and I. R. Fisher
    Phys. Rev. Lett. 102, 177002 (2009)

18. Superconductivity under high pressure in the binary compound CaLi₂
    M. Debessai, T. Matsuoka, J. J. Hamlin, A. K. Gangopadhyay, J. S. Schilling, K. Shimizu, and Y. Ohishi
    Phys. Rev. B 78, 214517 (2008)

17. Recent studies in superconductivity at extreme pressures
    J. S. Schilling and J. J. Hamlin
    J. Phys. Conf. Ser. 121, 052006 (2008)

16. Superconductivity in single crystals of LaFePO
    J. J. Hamlin, R. E. Baumbach, D. A. Zocco, T. A. Sayles, and M. B. Maple
    J. Phys.: Condens. Matter 20, 365220 (2008)

15. Effect of pressure on the superconducting critical temperature of La[O_0.89F_0.11]FeAs and Ce[O_0.88F_0.12]FeAs
    D. A. Zocco, J. J. Hamlin, R. E. Baumbach, M. B. Maple, M. A. McGuire, A. S. Sefat, B. C. Sales, R. Jin, D. Mandrus, J. R. Jeffries, S. T. Weir, and Y. K. Vohra
    Physica C 468, 2229 (2008)

14. Comparison of the pressure dependences of Tc in the trivalent d-electron superconductors Sc, Y, La, and Lu up to megabar pressures
    M. Debessai, J. J. Hamlin, and J. S. Schilling
    Phys. Rev. B 78, 064519 (2008)

13. Pressure induced superconductivity in CaLi₂
    T. Matsuoka, M. Debessai, J. J. Hamlin, A. K. Gangopadhyay, J. S. Schilling, and K. Shimizu.
    Phys. Rev. Lett. 100, 197003 (2008)

12. Superconductivity studies at extreme pressures
    J. J. Hamlin
    PhD Dissertation, Department of Physics, Washington University in St. Louis (2007)

11. Pressure-Induced Superconductivity in Sc to 74 GPa
    J. J. Hamlin and J. S. Schilling
    Phys. Rev. B 76, 012505 (2007)

10. Superconductivity at 20 K in Yttrium Metal at Pressures Exceeding 1 Mbar
    J. J. Hamlin, V. G. Tissen, and J. S. Schilling
    Physica C 451, 82 (2007)

9. ac susceptibility studies of the weak itinerant ferromagnet SrRuO₃ under high pressure to 34 GPa
   J. J. Hamlin, S. Deemyad, J. S. Schilling, M. K. Jacobsen, R. S. Kumar, A. L. Cornelius, G. Cao and J. J. Neumeier
   Phys. Rev. B 76, 014432 (2007)

8. Superconductivity in Sc Metal and Li(Mg) Alloy under Extreme Pressure
   J. J. Hamlin and J. S. Schilling
   Physica B 403, 1074 (2007)

7. Superconductivity at 17 K in Yttrium Metal under Nearly Hydrostatic Pressures to 89 GPa
   J. J. Hamlin, V. G. Tissen and J. S. Schilling
   Phys. Rev. B 73, 094522 (2006)

6. Enhanced Superconducting Properties of Bicrystalline YBa₂Cu₃O_x and Alkali Metals under Pressure
   T. Tomita, S. Deemyad, J. J. Hamlin, J. S. Schilling, V. G. Tissen, B. W. Veal, L. Chen and H. Claus
   J. Phys. Cond. Mat. 17, S921-8 (2005)

5. Dependence of the Superconducting Transition Temperature of Single- and Polycrystalline MgB₂ on Hydrostatic Pressure
   S. Deemyad, T. Tomita, J. J. Hamlin, B. Beckett, J. S. Schilling, D. G. Hinks, J. D. Jorgensen, S. Lee and S. Tajima
   Physica C 385, 105 (2003)

4. The Effect of Pressure on the Magnetic Properties of the Molecule-Based Canted Metamagnet Decamethylferrocenium 2,3-Dicyano-1,4-Naphthoquinonide, FeCp*2[DCNQ]
   J. J. Hamlin, B. Beckett, T. Tomita, J. S. Schilling, W. S. Tyree and G. T. Yee
   Polyhedron 22, 2249 (2003)

3. Hydrostatic Pressure Dependence of the Curie Temperature of [MnR₄TPP][TCNE] for R = OC₁₀H₂₁, OC₁₄H₂₉, and F
   C. W. Looney, K. Falk, J. J. Hamlin, T. Tomita, J. S. Schilling, W. Haase and Z. Tomkowicz
   Polyhedron 22, 3339 (2003)

2. Hydrostatic Pressure Dependence of the Superconducting and Structural Properties of MgB₂
   J. S. Schilling, J. D. Jorgensen, D. G. Hinks, S. Deemyad, J. J. Hamlin, C. W. Looney, and T. Tomita
   Studies of High Temperature Superconductors, Vol. 38, edited by A.V. Narlikar (Nova Science Publishers, N.Y., 2001) p.321.

1. Dependence of T_c on Hydrostatic Pressure in Superconducting MgB₂
   T. Tomita, J. J. Hamlin, J. S. Schilling, D. G. Hinks and J. D. Jorgensen
   Phys. Rev. B 64, 092505 (2001)

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