Publications

2023

  1. Jiashu Wang, Tianyi Wang, Mykhaylo Ozerov, Joaquin Bermejo-Ortiz, Zhan Zhang, Seul-Ki Bac, Hoai Trinh, Maksym Zhukovskyi, Tatyana Orlova, Haile Ambaye, Jong Keum, Louis-Anne de Vaulchier, Yves Guldner, Dmitry Smirnov, Valeria Lauter, Xinyu Liu, Badih A. Assaf, “Magnetic proximity-induced energy gap of surface states.” submitted arxiv2207.07685
  2. Ying Wang, Valeria Lauter, Olga Maximova, Shiva T. Konakanchi, Pramey Upadhyaya, Jong Keum, Haile Ambaye, Jiashu Wang, Waksym Zhukovskyi, Tatyana A. Orlova, Badih A. Assaf, Xinyu Liu, Leonid P. Rokhinson. Discovery of a high-temperature antiferromagnetic state and transport signatures of exchange interactions in a Bi2Se3/EuSe heterostructure. arxiv2011.01211
  3. Jiashu Wang, Xinyu Liu, Tianyi Wang, Mykhaylo Ozerov, Badih A. Assaf, “g-factor of topological interface states in Pb1-xSnxSe quantum wells” submitted to Phys. Rev. B 107, 155307 (2023)

2022

  1. G. Krizman, J. Bermejo Ortiz, M. Goyal, A. Lygo, J. Wang, Z. Zhang, B.A. Assaf, S. Stemmer, L.A. de Vaulchier, Y. Guldner. Enhanced Dirac node separation in strained Cd­3­As­2 ­topological semimetal. Phys. Rev. B 106 165202 (2022) arxiv2209.09779.
  2. Xinyu Liu, Logan Riney, Josue Guerra, William Powers, Jiashu Wang, Jacek K. Furdyna and Badih A. Assaf. Colossal negative magnetoresistance from hopping in insulating ferromagnetic semiconductors. Journal of Semiconductors 43 112502 (2022).
  3. V. Lauter, K. Wang, T. Mewes, A. Glavic, B. Toperverg, M. Ahmadi, B. A. Assaf, B. Hu, M. Li, X. Liu, Y. Liu, J.S. Moodera, L. Rokhinson, D. Singh, and N. Sun, “M-STAR: Magnetism second target advanced reflectometer at the spallation neutron source,” Review of Scientific Instruments 93, 103903 (2022).
  4. S.-K. Bac, K. Koller, F. Lux, J. Wang, L. Riney, K. Borisiak, W. Powers, M. Zhukovskyi, T. Orlova, M. Dobrowolska, J.K. Furdyna, N. Dilley, L.P. Rokhinson, Y. Mokrousov, R.J. McQueeney, O. Heinonen, X. Liu, B.A. Assaf. “Topological response of the anomalous Hall effect in MnBi2Te4 due to magnetic canting.” arxiv:2103.15801. npj Quantum Materials 7 46 (2022)
  5. Zhenyang Xiao, Jiashu Wang, Xinyu Liu, Badih A. Assaf, and David Burghoff. “Optical-Pump Terahertz-Probe Spectroscopy of the Topological Crystalline Insulator Pb1–x Sn x Se through the Topological Phase Transition.” ACS Photonics 9, 765 (2022).
  6. Logan Riney, Joaquin Bermejo-Ortiz, Gauthier Krizman, Seul-Ki Bac, Jiashu Wang, Maksym Zhukovskyi, Tatyana Orlova, Louis Anne de Vaulchier, Yves Guldner, Roland Winkler, Jacek K. Furdyna, Xinyu Liu, Badih A. Assaf. Fermi level tuning and band alignment in Mn doped InAs/GaSb arXiv:2111.14985. Phys. Rev. B 105 125301 (2022).
  7. G. Krizman, B. A. Assaf, M. Orlita, G. Bauer, G. Springholz, R. Ferreira, L. A. de Vaulchier, and Y. Guldner, “Interaction between interface and massive states in multivalley topological heterostructures”. Phys. Rev. Research 4 013179 (2022)
  8. Ying Wang, X. Liu, S.K. Bac, J. Wang, J.K. Furdyna, B.A. Assaf, M. Zhukovskyi, T. Orlova, Neil Dilley, Leonid P. Rokhinson. “Epitaxial growth and magnetic characterization of EuSe thin film with various crystalline orientations.” Journal of Applied Physics 131 055302 (2022)
  9. Jiashu Wang, W. Powers, Z. Zhang, M .Smith, B.J. McIntosh, S.K. Bac, L. Riney, M. Zhukovskyi, T. Orlova, L.P. Rokhinson, Y.T. Hsu, X. Liu, B.A. Assaf. “Observation of Coexisting weak localization and superconducting fluctuations in strained Sn1-xInxTe thin films.” Nanoletters 22 792 (2022) 10.1021/acs.nanolett.1c04370
  10. Michael Y. Toriyama, Madison K. Brod, Lídia C. Gomes, Ferdaushi A. Bipasha, Badih A. Assaf, Elif Ertekin and G. Jeffrey Snyder, “Tuning valley degeneracy with band inversion”. J. Mater. Chem. A, 10 1588 (2022)

2021

1. X. Liu, Sining Dong, Logan Riney, Jiashu Wang, Yong-Lei Wang, Ren-Kui Zheng, Seul-Ki Bac, Jacek Kossut, Margaret Dobrowolska, Badih A. Assaf, and Jacek K. Furdyna. “Crossover behavior of the anomalous Hall effect in Ga1-xMnxAs1-yPy across the metal-insulator transition” Phys. Rev. B 103, 214437 (2021).

2. X. Liu, J. Wang, L. Riney, S.K. Bac, D.J. Smith, M.R. McCartney, I. Khan, A.J. Hoffman, M. Dobrowolska, J.K. Furdyna, B.A. Assaf. “Unraveling the structural and electronic properties of the strained PbSe on GaAs ” Journal of Crystal Growth 570 126253 (2021)

3. G. Krizman, B. A. Assaf, G. Bauer, G. Springholz, L. A. de Vaulchier, and Y. Guldner “Miniband engineering and topological phase transitions in topological-insulator–normal-insulator superlattices” Phys. Rev. B 103, 235302 (2021)

4. S.-K. Bac, S. Lee, X. Liu, M. Dobrowolska, B.A. Assaf, J.K. Furdyna. “Magnetic Anisotropy of ferromagnetic Ga1-xMnxAs1-yPy with graded composition.” Phys. Rev. Materials 5 054414 (2021)

5. L. Riney, C. Bunker, S.-K. Bac, J. Wang, D. Battaglia, Y.-C. Park, M. Dobrowolska, J.K. Furdyna, X. Liu, B.A. Assaf. “Introduction of Sr into Bi2Se3 thin films by molecular beam epitaxy”. Journal of Applied Physics 129 085105 (2021). arxiv:2011.12755

2020

1. Jiashu Wang, X. Liu, C. Bunker, L. Riney, B. Qing, S.K. Bac, M. Zhukovskyi, T. Orlova, S. Rouvimov, M. Dobrowolska, J.K. Furdyna, B.A. Assaf. “Weak antilocalization beyond the fully diffusive regime in Pb1-xSnxSe topological quantum wells.” Phys. Rev. B 102 155307 (2020). arxiv 2010.02294

2. S. Dong, L. Riney, X. Liu, L. Guo, R.-K. Zheng, X. Li, S.K. Bac, J. Kossut, M. Dobrowolska, B.A. Assaf, and J.K. Furdyna. “Carrier localization in quaternary (Ga,Mn)(As,P) ferromagnetic semiconductor films.” Phys. Rev .Mater 5 014402 (2020)

3. M.E. Jamer, B. Wilfong, V.D. Buchelnikov, V.V. Sokolovskiy, O.N. Miroshkina, M.A. Zagrebin, D.R. Baigutlin, J.Naphy, B.A. Assaf, L.H. Lewis, A. Pulkkinen, B. Barbiellini, A. Bansil and D. Heiman, “Superconducting and antiferromagnetic properties of dual-phase V3Ga”. Appl. Phys. Lett. 117 062401 (2020)

2019

1. G. Krizman, T. Schumann, S. Tchoumakov, B.A. Assaf, S. Stemmer, L.A. de Vaulchier, Y. Guldner, “Determination of the crystal field splitting energy in Cd3As2 using magnetooptics”. Phys. Rev. B. 100 155205 (2019).

2. A. Inhofer, T. Wilde, J. Duffy, M. Boukhicha, J. Palomo, K. Watanabe, T. Taniguchi, J.-M. Berroir, G. Fève, E.  Bocquillon, B. Plaçais, B.A. Assaf, “RF compressibility of topological surface and interface states in metal-hBN-Bi2Se3 capacitors”. Journal of Physics: Materials, 2 044003 (2019) Focus Issue: Topological Matter

2018

1. G. Krizman, B.A. Assaf, T. Phuphachong, G. Bauer, G. Springholz, L.A. de Vaulchier, Y. Guldner. “Dirac parameters and topological phase transition of Pb1-xSnxSe from magneto-spectroscopy” Phys. Rev. B. 98 245202 (2018) arxiv 1810.10490

2. G. Krizman, B.A. Assaf, M. Orlita, T. Phuphachong, G. Bauer, G. Springholz, G. Bastard, R. Ferreira, L.A. de Vaulchier, Y. Guldner. “Avoided level crossing at the magnetic field induced topological phase transition due to orbital mixing” Phys. Rev. B. 98 161202 (2018). arxiv 1808.03361. Rapid Comm. Editors’ Suggestion.

3. P. M. Hosseinpour, F. Jiménez-Villacorta, J. Liu, B.A. Assaf, I.J. McDonald, D. Arena, D. Heiman, L. Menon, and L.H. Lewis. “Fe-incorporated TiO2nanotube arrays: Electronic structure and magnetic response” Phys. Rev. B 98 195145 (2018)

4. G. Krizman, B.A. Assaf, T. Phuphachong, G. Bauer, G. Springholz, G. Bastard, R. Ferreira, L.A. de Vaulchier, Y. Guldner. “Tunable Dirac interface states in topological superlattices” Phys. Rev. B 98 075303 (2018). arXiv:1806.04876

5. D. Walkup, B.A. Assaf, K.L. Scipioni, R. Sankar, F. Chou, G. Chang, H. Lin, I. Zeljkovic, V. Madhavan, “Interplay of orbital effects and nanoscale strain in topological crystalline insulator.” Nature Communications 9 1550 (2018). arxiv1610.09337.

6. A. Inhofer, J. Duffy, M. Boukhicha, E. Bocquillon, J. Palomo, K. Watanabe, T. Taniguchi, I. Estève, J.M. Berroir, G. Fève, B. Plaçais, B.A. Assaf. “RF compressibility of topological insulator Bi2Se3­ in the bulk depleted regime”, Physical Review Applied 9 024022 (2018). arxiv1707.01657

Before 2018 (22)

  • B.A. Assaf, T. Phuphachong, E. Kampert, V. Volobuev, P. Mandal, J. Sanchez-Barriga, O. Rader, G. Bauer, G. Springholz, L.A. de Vaulchier, Y. Guldner, “Negative magnetoresistance from anomalous N=0 Landau level in topological matter”. Physical Review Letters 119, 106602 (2017) . Editors’ Suggestion.
  • A. Inhofer, S. Tchoumakov, B.A. Assaf, G. Fève, J.M. Berroir, V. Jouffrey, D. Carpentier, M. Goerbig, B. Plaçais, K. Bendias, D.M. Mahler, E. Bocquillon, E. Schlereth, C. Brüne, H. Buhmann, L.W. Molenkamp. “Topological confined massive surface states in strained bulk HgTe probed by RF compressibility”, Physical Review B. 96 195104 (2017) arxiv.1704.04045. Editors’ Suggestion.T. Phuphachong, B.A. Assaf, V.V. Volobuev, G. Springholz, G. Bauer, L.A. de Vaulchier, Y. Guldner. “Magnetooptical evidence of the topological phase transition in (111)-Pb1-xSnxTe. Journal of Physics: Conference Series. 864, 012038 (2017).
  • B.A. Assaf, T. Phuphachong, V.V. Volobuev, G. Springholz, G. Bauer, L.A. de Vaulchier, Y. Guldner. “Magnetooptical determination of a topological index”. NPJ Quantum Materials. 2, 26 (2017) arxiv: 1608.08912
  • T. Phuphachong, B.A. Assaf, V.V. Volobuev, G. Springholz, G. Bauer, L.A. de Vaulchier, Y. Guldner. “Dirac Landau Level Spectroscopy in Pb1−xSnxSe and Pb1−xSnxTe across the Topological Phase Transition: A Review”. Crystals 7, 29 (2017)
  • Callewaert, K. Shastry, R. Saniz, I. Makkonen, B. Barbiellini, B. A. Assaf, D. Heiman, J.S. Moodera, B. Partoens, A. Bansil, A. Weiss, “Positron surface state as a new spectroscopic probe for characterizing surfaces of topological insulator materials”. Physical Review B. 94, 115411 (2016)
  • Katmis, V. Lauter, F.S. Nogueira, B.A. Assaf, M.E Jamer, P. Wei, B. Satpati, J.W. Freeland, I. Eremin, D. Heiman, P. Jarillo-Herrero, J.S. Moodera, “A high-temperature ferromagnetic topological insulating phase by proximity coupling.” Nature 533, 513, (2016).
  • B.A. Assaf, T. Phuphachong, V.V. Volobuev, A. Inhofer, G. Springholz, G. Bauer, L.A. de Vaulchier, Y. Guldner. “Massive and massless Dirac fermions in Pb1-xSnxTe topological crystalline insulator probed by magnetooptical absorption”. Scientific Reports 6, 20323 (2016). arxiv: 1510.01081
  • K. Shastry, A.H. Weiss, B. Barbiellini, B.A. Assaf, Z.H. Lim, P.V. Joglekar, D. Heiman. “Evidence of positron bound State on the surface of a topological insulator.” Journal of Physics: Conference Series. 618, 012006 (2015).
  • I. Zeljkovic, D. Walkup, B.A. Assaf, K. Scipioni, R. Sankar, F. Chou, V. Madhavan. “Strain engineering Dirac surface states in heteroepitaxial topological crystalline insulator thin films.” Nature Nanotechnology 10, 849 (2015). arxiv: 1501.01233.
  • B. A. Assaf, F. Katmis, P. Wei, C.Z. Chang, B. Satpati, J.S. Moodera, D. Heiman. “Inducing magnetism onto the surface of a topological crystalline insulator”. Physical Review B 91, 195310, (2015). arxix: 1504.06121
  • C.Z. Chang, W. Zhao, D.Y. Kim, H. Zhang, B.A. Assaf, D. Heiman, S.C. Zhang, C. Liu, M.H.W. Chan, J.S. Moodera. “High-precision realization of robust quantum Hall states in a hard ferromagnetic topological insulator.” Nature Materials, 14, 473 (2015). arxiv: 1412.3758
  • M.E. Jamer, B.A. Assaf, G.E. Sterbinsky, D. Arena, L.H. Lewis, A.A. Saul, G. Radtke, D. Heiman, “Antiferromagnetic phase in gapless semiconductor V3Al”, Physical Review B, 91, 094409, (2015)
  • M.E. Jamer, B.A. Assaf, G.E. Sterbinsky, D.A. Arena, D. Heiman, “Atomic moments in Mn2CoAl thin films analyzed by X-ray magnetic circular dichroism”, Journal of Applied Physics, 116, 213914 (2014).
  • B.A. Assaf, F. Katmis, P. Wei, B. Satpati, Z. Zhang, J.S. Moodera, D. Heiman, “Quantum coherent transport in SnTe topological crystalline insulator thin films”, Applied Physics Letters, 105, 102108 (2014), arxiv 1403.1810
  • M.E. Jamer, B.A. Assaf, S. P. Bennett, L.H. Lewis, D. Heiman, “Magnetic properties and large coercivity in MnxGa nnostructures”, Journal of Magnetism and Magnetic Materials, 358-359, 285 (2014).
  • G.X. Miao, J. Chang, B.A. Assaf, D. Heiman and J.S. Moodera, “Spin regulation in composite spin-filter barrier devices”, Nature Communications, 5, 3682 (2014).
  • T. Nan, Z. Zhou, M. Liu, X. Yang, Y.Gao, B.A. Assaf, H. Lin, S. Velu, X.Wang, H. Luo, J. Shen, S. Akhtar, E. Hu, R. Rajiv, K. Krishnan, S. Sreedhar, D. Heiman, B.M. Howe, G.J. Brown and N.X. Sun, “Quantification of strain and charge co-mediated magnetoelectric coupling on ultra-thin Permalloy PMN-PT interface“, Scientific Reports, 4, 3368 (2014)
  • M.E. Jamer, B.A. Assaf, T. Devakul and D. Heiman, “Magnetic and transport properties of spin gapless Mn2CoAl films”, Applied Physics Letters, 103, 142403 (2013), arxiv 1309.6660.
  • P. Wei, F. Katmis, B.A. Assaf, H. Steinberg, P. Jarillo-Herrero, D. Heiman, J.S. Moodera, “Magnetic proximity-induced symmetry breaking in topological insulators”, Physical Review Letters, 110, 186807 (2013)
  • B.A. Assaf, T. Cardinal, P. Wei, F. Katmis, J.S. Moodera, D. Heiman, “Linear Magnetoresistance in Topological Insulator Thin Films: Quantum Phase Coherence Effects at High Temperatures”, Applied Physics Letters 102, 012102 (2013), arxiv: 1205.4635.
  • B. Li, N. Roschewsky, B.A. Assaf, M. Eich, M. Epstein-Martin, D. Heiman, M. Münzenberg, J.S. Moodera, “Superconducting Spin Switch with Infinite Magnetoresistance Induced by an Internal Exchange Field”, Physical Review Letters, 110, 097001 (2013)
  • B.A. Assaf, T. Cardinal, P. Wei, F. Katmis, J.S. Moodera, D. Heiman, “Modified Electrical Transport Probe Design for Standard Magnetometer”, Review of Scientific Instruments 83, 033904 (2012), arxiv: 1203.0682.