UNIVERSITY of NOTRE DAME DEPARTMENT of PHYSICS  
  Eskildsen Group
Superconductivity and Vortices
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Publications
M. W. Olszewski, M. R. Eskildsen, C. Reichhardt, and C. J. O. Reichhardt, "Structural Transitions in Vortex Systems with Anisotropic Interactions," arXiv: 1708.07116 .

W. J. Gannon, W. P. Halperin, M. R. Eskildsen, P. Dai, U. B. Hansen, K. Lefmann, and A. Stunault, "Spin Susceptibility of the Topological Superconductor UPt3 from Polarized Neutron Diffraction," Phys. Rev. B 96, 041111(R) (2017).

M. Marziali Bermúdez, E. R. Louden, M. R. Eskildsen, C. D. Dewhurst, V. Bekeris, and G. Pasquini, "Metastability and hysteretic vortex pinning near the order-disorder transition in NbSe2: Interplay between plastic and elastic energy barriers," Phys. Rev. B 95, 104505 (2017).

S. J. Kuhn, M. K. Kidder, W. M. Chance, C. dela Cruz, M. A. McGuire, D. S. Parker, L. Li, L. Debeer-Schmitt, J. Ermentrout, K. Littrell, M. R. Eskildsen, and A. S. Sefat, "Structure and Property Correlations in FeS," Physica C 354, 29-36 (2017).

S. J. Kuhn, H. Kawano-Furukawa, E. Jellyman, R. Riyat, E. M. Forgan, M. Ono, K. Kihou, C. H. Lee, F. Hardy, P. Adelmann, Th. Wolf, C. Meingast, J. Gavilano, and M. R. Eskildsen, "Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFe2As2 by Small-Angle Neutron Scattering Studies of the Vortex Lattice," Phys. Rev. B 93, 104527 (2016).
Featured as an "Editors’ suggestion"

M. Marziali Bermúdez, M. R. Eskildsen, M. Bartkowiak, G. Nagy, V. Bekeris, and G. Pasquini, "Dynamic reorganization of vortex matter into partially disordered lattices," Phys. Rev. Lett. 115, 067001 (2015).

W. J. Gannon, W. P. Halperin, C. Rastovski, K. J. Schlesinger, J. Hlevyack, M. R. Eskildsen, A. B. Vorontsov, J. Gavilano, U. Gasser, and G. Nagy, "Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt3 from Small Angle Neutron Scattering," New J. Phys. 17, 023041 (2015).

C. Rastovski, K. J. Schlesinger, W. J. Gannon, C. D. Dewhurst, L. DeBeer-Schmitt, N. D. Zhigadlo, J. Karpinski and M. R. Eskildsen, "Persistence of Metastable Vortex Lattice Domains in MgB2 in the Presence of Vortex Motion," Phys. Rev. Lett. 111, 107002 (2013).

C. Rastovski, C. D. Dewhurst, W. J. Gannon, D. Peets, H. Takatsu, Y. Maeno, M. Ichioka, K. Machida and M. R. Eskildsen, "Anisotropy of the Superconducting State in Sr2RuO4," Phys. Rev. Lett. 111, 087003 (2013).
Featured in the Institut Laue-Langevin 2013 annual report, p. 16-17.

P. Das, J. M. Densmore, C. Rastovski, K. J. Schlesinger, M. Laver, C. D. Dewhurst, K. Littrell, S. L. Bud'ko, P. C. Canfield, and M. R. Eskildsen, "Field Dependence of the Superconducting Basal Plane Anisotropy of TmNi2B2C," Phys. Rev. B 86, 144501 (2012).

W. J. Gannon, W. P. Halperin, C. Rastovski, M. R. Eskildsen, P. Dai, and A. Stunault, "Magnetization in the Superconducting State of UPt3 from Polarized Neutron Diffraction," Phys. Rev. B 86, 104510 (2012).

P. Das, C. Rastovski, T. R. O'Brien, K. J. Schlesinger, C. D. Dewhurst, L. DeBeer-Schmitt, N. D. Zhigadlo, J. Karpinski, and M. R. Eskildsen, "Observation of Well-Ordered Metastable Vortex Lattice Phases in Superconducting MgB2 Using Small-Angle Neutron Scattering," Phys. Rev. Lett. 108, 167001 (2012).
Featured in the Institut Laue-Langevin 2012 annual report, p. 28-29.

P. Das, J. S. White, A. T. Holmes, S. Gerber, E. M. Forgan, A. D. Bianchi, M. Kenzelmann, M. Zolliker, J. L. Gavilano, E. D. Bauer, J. L. Sarrao, C. Petrovic, and M. R. Eskildsen, "Vortex lattice studies in CeCoIn5 with Hc," Phys. Rev. Lett. 108, 087002 (2012).
Featured as a 2012 scientific highlight by the Paul Scherrer Institut NUM department.

M. R. Eskildsen, "Vortex lattices in type-II superconductors studied by small-angle neutron scattering," Front. Phys. 6, 398-409 (2011).

M. R. Eskildsen, E. M. Forgan, and H. Kawano-Furukawa, "Vortex structures, penetration depth and pairing in iron-based superconductors studied by small-angle neutron scattering," Rep. Prog. Phys. 74, 124504 (2011).

E. Blackburn, P. Das, M. R. Eskildsen, E. M. Forgan, M. Laver, C. Niedermayer, C. Petrovic, and J. S. White, "Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5," Phys. Rev. Lett. 105, 187001 (2010).

P. Das, T. O'Brien, M. Laver, C. D. Dewhurst, N. Ni, S. L. Bud'ko, P. C. Canfield, and M. R. Eskildsen, "Small-angle neutron scattering study of vortices in superconducting Ba(Fe0.93Co0.07)2As2," Supercond. Sci. Technol. 23, 054007 (2010).

J. S. White, P. Das, M. R. Eskildsen, L. DeBeer-Schmitt, E. M. Forgan, A. D. Bianchi, M. Kenzelmann, M. Zolliker, S. Gerber, J. L. Gavilano, J. Mesot, R. Movshovich, E. D. Bauer, J. L. Sarrao, and C. Petrovic, "Observations of Pauli paramagnetic effects on the flux line lattice cores in CeCoIn5," New J. Phys. 12, 023026 (2010).

J. M. Densmore, P. Das, K. Rovira, T. D. Blasius, L. DeBeer-Schmitt, N. Jenkins, D. McK. Paul, C. D. Dewhurst, S. L. Bud'ko, P. C. Canfield, and M. R. Eskildsen, "Small-angle neutron scattering study of the vortex lattice in superconducting LuNi2B2C," Phys. Rev. B 79, 174522 (2009).

M. R. Eskildsen, L. Ya. Vinnikov, I. S. Veshchunov, T. M. Artemova, T. D. Blasius, J. M. Densmore, C.D. Dewhurst, N. Ni, A. Kreyssig, S.L. Bud'ko, P.C. Canfield, and A.I. Goldman, "Vortex imaging in Co-doped BaFe2As2," Physica C 469, 529 (2009).

M. R. Eskildsen, L. Ya. Vinnikov, T. D. Blasius, I. S. Veshchunov, T. M. Artemova, J. M. Densmore, C. D. Dewhurst, N. Ni, A. Kreyssig, S. L. Bud'ko, P. C. Canfield, and A. I. Goldman, "Vortices in superconducting Ba(Fe0.93Co0.07)2As2 studied via small-angle neutron scattering and Bitter decoration," Phys. Rev. B 79, 100501(R) (2009).
Featured in Virtual Journal of Applications of Superconductivity, 16(6) (2009).

A. D. Bianchi, M. Kenzelmann, L. DeBeer-Schmitt, J. S. White, E. M. Forgan, J. Mesot, M. Zolliker, J. Kohlbrecher, R. Movshovich, E. D. Bauer, J. L. Sarrao, Z. Fisk, C. Petrovic, and M. R. Eskildsen, "Superconducting Vortices in CeCoIn5: Toward the Pauli-Limiting Field," Science 319, 177 (2008).
Featured in the Paul Scherrer Institut 2007 Scientific Report, p. 24-25.

L. DeBeer-Schmitt, M. R. Eskildsen, M. Ichioka, K. Machida, N. Jenkins, C. D. Dewhurst, A. B. Abrahamsen, S. L. Bud'ko, and P. C. Canfield, "Pauli Paramagnetic Effects on Vortices in Superconducting TmNi2B2C," Phys. Rev. Lett. 99, 167001 (2007).
Featured in the Institut Laue-Langevin 2007 annual report, p. 16-17.

R. Cubitt, J. S. White, M. Laver, M. R. Eskildsen, C. D. Dewhurst, D. McK. Paul, A. J. Crichton, M. Ellerby, C. Howard, Z. Kurban, and F. Norris, "Small-angle neutron scattering measurements of the vortex lattice in CaC6," Phys. Rev. B 75, 140516(R) (2007).

L. DeBeer-Schmitt, C. D. Dewhurst, B. W. Hoogenboom, C. Petrovic, and M. R. Eskildsen, "Field Dependent Coherence Length in the Superclean, High-κ Superconductor CeCoIn5," Phys. Rev. Lett. 97, 127001 (2006).

J. Li, D. Vaknin, S. L. Bud'ko, P. C. Canfield, D. Pal, M. R. Eskildsen, Z. Islam, and V. G. Kogan , "Magnetic-field-induced orientation of superconducting MgB2 crystallites determined by x-ray diffraction," Phys. Rev. B 74, 064502 (2006).

R. Cubitt, C. D. Dewhurst, M. R. Eskildsen, S. J. Levett, A. Matadeen, J. Jun, S. M. Kazakov, J. Karpinski, S. L. Bud'ko, N. E. Anderson, and P. C. Canfield, "Penetration depth anisotropy in MgB2 single crystals and powders," J. Phys. Chem. Sol. 67, 493-496 (2006).

D. Pal, L. DeBeer-Schmitt, T. Bera, R. Cubitt, C. D. Dewhurst, J. Jun, N. D. Zhigadlo, J. Karpinski, V. G. Kogan, and M. R. Eskildsen, "Measuring the penetration depth anisotropy in MgB2 using small-angle neutron scattering," Phys. Rev. B 73, 012513 (2006).

D. Jaiswal-Nagar, D. Pal, M. R. Eskildsen, P. C. Canfield, H. Takeya, S. Ramakrishnan, and A. K. Grover, "Vortex phase diagram studies in the weakly pinned single crystals of YNi2B2C and LuNi2B2C," PRAMANA - journal of physics 66, 113-129 (2006).

D. Jaiswal-Nagar, A. D. Thakur, M. R. Eskildsen, P. C. Canfield, S. M. Yusuf, S. Ramakrishnan, and A. K. Grover, "dHvA oscillations, upper critical field and the peak effect studies in a single crystal of LuNi2B2C," Physica B 359-361, 476-478 (2005).

A. Jensen, K. N. Toft, A. B. Abrahamsen, N. H. Andersen, J. Jensen, P. Hedegaard, J. Klenke, K. Prokes, P. Smeibidl, S. Danilkin, V. Silenko, M. R. Eskildsen, and P. C. Canfield, "Magnetic phase diagram of ErNi2B2C," Physica C 408-410, 97-99 (2004).

K. N. Toft, A. B. Abrahamsen, M. R. Eskildsen, K. Lefmann, N. H. Andersen, P. Vorderwisch, P. Smeibidl, M. Meissner, and P. C. Canfield, "Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C," Phys. Rev. B 69, 214507 (2004).

C. D. Dewhurst, R. Cubitt, M. R. Eskildsen, J. Jun, S. M. Kazakov, and J. Karpinski, "Vortex lattice reorientation and anisotropy in MgB2 - Effects of two-band superconductivity," Physica C 404, 135-139 (2004).

A. Jensen, K. N. Toft, A. B. Abrahamsen, D. F. McMorrow, M. R. Eskildsen, N. H. Andersen, J. Jensen, P. Hedegaard, J. Klenke, S. Danilkin, K. Prokes, V. Sikolenko, P. Smeibidl, S. L. Bud'ko, and P. C. Canfield, "Field-induced magentic phases in the normal and superconducting phases of ErNi2B2C," Phys. Rev. B 69, 104527 (2004).

M. R. Eskildsen, N. Jenkins, G. Levy, M. Kugler, Ø. Fischer, J. Jun, S. M. Kazakov, and J. Karpinski, "Vortex Imaging in Magnesium Diboride with Hc," Phys. Rev. B 68, 100508(R) (2003).

R. Cubitt, M. R. Eskildsen, C. D. Dewhurst, J. Jun, S. M. Kazakov, and J. Karpinski, "Effects of Two-Band Superconductivity on the Flux-Line Lattice in Magnesium Diboride," Phys. Rev. Lett. 91, 047002 (2003).
Featured in the Institut Laue-Langevin 2003 annual report, cover illustration and p. 20-21.

M. R. Eskildsen, M. Kugler, G. Levy, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and Ø. Fischer, "Vortex lattice imaging in single crystal MgB2 by scanning tunneling spectroscopy," Physica C 388-389, 143-144 (2003).

A. Junod, Y. Wang, F. Bouquet, I. Sheikin, P. Toulemonde, M. R. Eskildsen, M. Eisterer, H. W. Weber, S. Lee, and S. Tajima, "Specific heat of ceramic and single crystal MgB2," Physica C 388-389, 107-108 (2003).

M. R. Eskildsen, C. D. Dewhurst, B. W. Hoogenboom, C. Petrovic, and P. C. Canfield, "Hexagonal and Square Flux Line Lattices in CeCoIn5," Phys. Rev. Lett. 90, 187001 (2003).

M. R. Eskildsen, M. Kugler, G. Levy, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and Ø. Fischer, "Scanning Tunneling Spectroscopy on Single Crystal MgB2," Physica C 385, 169-176 (2003).

J. Karpinski, M. Angst, J. Jun, S. M. Kazakov, R. Puzniak, A. Wisniewski, J. Roos, H. Keller, A. Perucchi, L. Degiorgi, M. R. Eskildsen, P. Bordet, L. Vinnikov, and A. Mironov, "MgB2 single crystals: high pressure growth and physical properties," Supercond. Sci. Technol. 16, 221-230 (2003).

M. R. Eskildsen, M. Kugler, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and Ø. Fischer, "Vortex Imaging in the π Band of Magnesium Diboride," Phys. Rev. Lett. 89, 187003 (2002).
Featured in MaNeP newsletter no. 3, 6 (2002).

M. R. Eskildsen, A. B. Abrahamsen, P. L. Gammel, D. J. Bishop, N. H. Andersen, K. Mortensen, and P. C. Canfield, "Flux line lattice symmetries in the borocarbide superconductor LuNi2B2C," PRAMANA - journal of physics 58, 903-905 (2002).

M. R. Eskildsen, A. B. Abrahamsen, V. G. Kogan, P. L. Gammel, K. Mortensen, N. H. Andersen, and P. C. Canfield, "Temperature Dependence of the Flux Line Lattice Transition into Square Symmetry in Superconducting LuNi2B2C," Phys. Rev. Lett. 86, 5148-5151 (2001).

M. R. Eskildsen, K. Norgaard, A. B. Abrahamsen, N. H. Andersen, K. Mortensen, P. L. Gammel, D. Lopez, D. J. Bishop, P. Vorderwisch, M. Meissner, and P. C. Canfield, "Neutron scattering studies of the flux line lattice and magnetic ordering in TmNi2B2C," in Rare-Earth Transition Metal Borocarbides (Nitrides): Superconducting, Magnetic and Normal State Properties, edited by. K.-H. Muller and V. Narozhnyi, p.333-340 (Kluwer Academic Publishers, 2001).

P. L. Gammel, D. Lopez, D. J. Bishop, M. R. Eskildsen, A. B. Abrahamsen, N. H. Andersen, K. Mortensen, I. R. Fisher, and P. C. Canfield, "Flux line lattic symmetry transitions in the borocarbide superconductors," in Rare-Earth Transition Metal Borocarbides (Nitrides): Superconducting, Magnetic and Normal State Properties, edited by. K.-H. Muller and V. Narozhnyi, p.313-322 (Kluwer Academic Publishers, 2001).

M. R. Eskildsen, A. B. Abrahamsen, D. Lopez, P. L. Gammel, D. J. Bishop, K. Mortensen, N. H. Andersen, and P. C. Canfield, "Flux Line Lattice Reorientation in the Borocarbide Superconductors with H || a," Phys. Rev. Lett. 86, 320-323 (2001).

M. R. Eskildsen, P. L. Gammel, D. J. Bishop, N. H. Andersen, K. Mortensen, I. R. Fisher, and P. C. Canfield, "Flux Line Lattice Symmetries in the Borocarbide Superconductors," in Magnetic and Superconducting Materials, edited by M. Akhavan, J. Jensen and K. Kitazawa, p. 433-446 (World Scientific Publishing Co., Singapore, 2000).

M. R. Eskildsen, P. L. Gammel, D. J. Bishop, A. B. Abrahamsen, N. H. Andersen, K. Mortensen, and P. C. Canfield, "Temperature Dependence of the Flux Line Lattice Hexagonal to Square Symmetry Transition in LuNi2B2C: A Crossover from London to Ginzburg-Landau Behaviour," in Magnetic and Superconducting Materials, edited by M. Akhavan, J. Jensen and K. Kitazawa, p. 476 (World Scientific Publishing Co., Singapore, 2000).

K. Nørgaard, M. R. Eskildsen, N. H. Andersen, J. Jensen, P. Hedegaard, S. N. Klausen, and P. C. Canfield, "Interdependence of Magnetism and Superconductivity in the Borocarbide TmNi2B2C," Phys. Rev. Lett. 84, 4982-4985 (2000).

M. R. Eskildsen, I. R. Fisher, P. L. Gammel, D. J. Bishop, N. H. Andersen, K. Mortensen, and P. C. Canfield, "Non-locality and the flux line lattice square to hexagonal symmetry transition in the borocarbide superconductors," Physica C 332, 320-326 (2000).

P. L. Gammel, D. Lopez, D. J. Bishop, M. R. Eskildsen, N. H. Andersen, K. Mortensen, I. R. Fisher, K. O. Cheon, and P. C. Canfield, "Interwoven magnetic and flux line structures in single crystal (Tm,Er)i2B2C," J. Appl. Phys. 87, 5544-5548 (2000).

P. L. Gammel, D. J. Bishop, M. R. Eskildsen, K. Mortensen, N. H. Andersen, I. R. Fisher, K. O. Cheon, P. C. Canfield, and V. G. Kogan, "Systematic Studies of the Square-Hexagonal Flux Line Lattice Transition in Lu(Ni1-xCox)2B2C: The Role of Nonlocality," Phys. Rev. Lett. 82, 4082-4085 (1999).

M. R. Eskildsen, K. Harada, P. L. Gammel, N. H. Andersen, G. Ernst, A. P. Ramirez, D. J. Bishop, K. Mortensen, and P. C. Canfield, "Hysteresis in the Field Induced Magnetic Structure in TmNi2B2C," Physica B 259-261, 582-582 (1999).

P. L. Gammel, B. P. Barber, A. P. Ramirez, C. M. Varma, D. J. Bishop, P. C. Canfield, V. G. Kogan, M. R. Eskildsen, N. H. Andersen, K. Mortensen, and K. Harada, "Effects of Magnetic Order on the Superconducting Length Scales and Critical Fields in Single Crystal ErNi2B2C," Phys. Rev. Lett. 82, 1756-1759 (1999).

M. R. Eskildsen, P. L. Gammel, B. P. Barber, A. P. Ramirez, D. J. Bishop, N. H. Andersen, K. Mortensen, and P. C. Canfield, "Square to hexagonal symmetry transition of the flux line lattice in YNi2B2C for different field orientations," Physica B 241-243, 811-813 (1998).

M. R. Eskildsen, K. Harada, P. L. Gammel, A. B. Abrahamsen, N. H. Andersen, G. Ernst, A. P. Ramirez, D. J. Bishop, K. Mortensen, D. R. Naugle, K. D. D. Rathnayaka, and P. C. Canfield, "Intertwined symmetry of the magnetic modulation and the flux line lattice in the superconducting state of TmNi2B2C," Nature 393, 242-245 (1998).

P. L. Gammel, U. Yaron, A. P. Ramirez, D. J. Bishop, A. M. Chang, R. Ruel, L. N. Pfeiffer, E. Bucher, G. D'Anna, D. A. Huse, K. Mortensen, M. R. Eskildsen, and P. H. Kes, "Structure and Correlations of the Flux Line Lattice in Crystalline Nb Through the Regime of the Peak Effect," Phys. Rev. Lett. 80, 833-836 (1998).

M. R. Eskildsen, P. L. Gammel, E. D. Isaacs, C. Detlefs, K. Mortensen, and D. J. Bishop, "Compound refractive optics for the imaging and focussing of long wavelength neutrons," Nature 391, 563-566 (1998).

M. R. Eskildsen, P. L. Gammel, B. P. Barber, A. P. Ramirez, D. J. Bishop, N. H. Andersen, K. Mortensen, C. A. Bolle, C. M. Lieber, and P. C. Canfield, "Structural Stability of the Square Flux Line Lattice in YNi2B2C and LuNi2B2C Studied with Small Angle Neutron Scattering," Phys. Rev. Lett. 79, 487-490 (1997).

M. R. Eskildsen, P. L. Gammel, B. P. Barber, U. Yaron, A. P. Ramirez, D. A. Huse, D. J. Bishop, C. Bolle, C. M. Lieber, S. Oxx, S. Sridhar, N. H. Andersen, K. Mortensen, and P. C. Canfield, "Observation of a Field-Driven Structural Phase Transition in the Flux Line Lattice in ErNi2B2C," Phys. Rev. Lett. 78, 1968-1971 (1997).

M. R. Eskildsen and H. Smith, "Surface acoustic waves and the magnetoconductivity of a two-dimensional electron gas," J. Phys.: Condens. Matter 8, 6597-6605 (1996).

U. Yaron, P. L. Gammel, A. P. Ramirez, D. A. Huse, D. J. Bishop, A. I. Goldman, C. Stassis, P. C. Canfield, K. Mortensen, and M. R. Eskildsen, "Microscopic coexistence of magnetism and superconductivity in ErNi2B2C," Nature 382, 236-238 (1996).

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Eskildsen Group, Department of Physics
225 Nieuwland Science Hall, Notre Dame, Indiana 46556
Phone: 574-631-4010 Email: eskildsen@nd.edu
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