64 citations · 441 across the 23 of their papers we have counts for
26 papers
Molecular Beam Epitaxy of AgTaO3
Tobias Schwaigert, Joshua Maile, Olivia Peek +6
We report the first synthesis of single-crystal AgTaO3 thin films using molecular-beam epitaxy (MBE). High-quality epitaxial AgTaO3 films were grown on both (001)- and (111)-orient…
Transport Evidence of Magnetic Polarization in the Altermagnetic Candidate MnTe
Younes Ghorbani, Nayana Devaraj, Joshua Maile +7
The ability to precisely control magnetic properties is central to the development of future spin-based electronics. In this work, we report the successful growth of epitaxial α-Mn…
Anisotropic Superconductivity with Enhanced Critical Field in Strained RuO2
Younes Ghorbani, Samuel Poage, Xuehsi Gao +9
The superconductivity in RuO2 emerges under strain. RuO2 is also an altermagnet candidate. The nature of superconductivity and its relation with neighboring orders, however, are no…
Above Room Temperature Ferroelectricity in Epitaxially Strained KTaO3
Tobias Schwaigert, Salva Salmani-Rezaie, Sankalpa Hazra +9
Epitaxial strain is a powerful means to engineer emergent phenomena in thin films and heterostructures. Here, we demonstrate that KTaO3, a cubic perovskite in bulk form, can be epi…
Resonant diffraction and photoemission inconsistent with altermagnetism in epitaxial RuO films
Benjamin Z. Gregory, Neha Wadehra, Shuyuan Zhang +15
Excitement about the magnetic and electronic properties of RuO is growing, fueled by reports of antiferromagnetism, strain-induced superconductivity, and its recent classificat…
Large phonon-drag thermopower polarity reversal in Ba-doped KTaO3
Mohamed Nawwar, Samuel Poage, Tobias Schwaigert +6
This study reports the observation of phonon-drag thermopower polarity reversal in Ba-doped KTaO3 thin films, mediated by electron-phonon Umklapp scattering. Epitaxial films with d…
Electrostatic control of quantum phases in KTaO3-based planar constrictions
Jordan T. McCourt, Ethan G. Arnault, Merve Baksi +5
Two-dimensional electron gases (2DEGs) formed at complex oxide interfaces offer a unique platform to engineer quantum nanostructures. However, scalable fabrication of locally addre…
Superconductivity in tin telluride films grown by molecular beam epitaxy
Antonio Gonzalez, Samuel J. Poage, Bernardo Langa +7
The intersection of superconductivity and ferroelectricity hosts a wide range of exotic quantum phenomena. Here, we report on the observation of superconductivity in high-quality t…
Spin-to-charge conversion at KTaO3(111) interfaces
Athby H. Al-Tawhid, Rui Sun, Andrew H. Comstock +3
Rashba spin-orbit coupling locks the spin with momentum of charge carriers at the broken inversion interfaces, which could generate a large spin galvanic response. Here, we demonst…
Violation of Pauli Limit at KTaO3(110) Interfaces
Samuel J. Poage, Xueshi Gao, Merve Baksi +7
The superconducting order parameter at the KTaO3 interfaces and its dependence on interface orientation remains a subject of debate. The superconductivity at these interfaces exhib…
Enhanced Critical Field of Superconductivity at an Oxide Interface
Athby H. Al-Tawhid, Samuel J. Poage, Salva Salmani-Rezaie +6
The nature of superconductivity and its interplay with strong spin-orbit coupling at the KTaO3(111) interfaces remains a subject of debate. To address this problem, we grew epitaxi…
Molecular Beam Epitaxy of KTaO
Tobias Schwaigert, Salva Salmani-Razaie, Matthew R. Barone +6
Strain-engineering is a powerful means to tune the polar, structural, and electronic instabilities of incipient ferroelectrics. KTaO3 is near a polar instability and shows anisotro…
Coexistence of superconductivity and weak anti-localization at KTaO3 (111) interfaces
Athby H. Al-Tawhid, Jesse Kanter, Mehdi Hatefipour +3
The intersection of two-dimensional superconductivity and topologically nontrivial states hosts a wide range of quantum phenomena, including Majorana fermions. Coexistence of topol…
Oxygen vacancy-induced anomalous Hall effect in a nominally non-magnetic oxide
Athby H. Al-Tawhid, Jesse Kanter, Mehdi Hatefipour +4
The anomalous Hall effect, a hallmark of broken time-reversal symmetry and spin-orbit coupling, is frequently observed in magnetically polarized systems. Its realization in non-mag…
Topological Quantum Matter to Topological Phase Conversion: Fundamentals, Materials, Physical Systems for Phase Conversions, and Device Applications
Md Mobarak Hossain Polash, Shahram Yalameha, Haihan Zhou +3
The spin-orbit coupling field, an atomic magnetic field inside a Kramer's system, or discrete symmetries can create a topological torus in the Brillouin Zone and provide protected…
Magneto-Elastic Coupling to Coherent Acoustic Phonon Modes in Ferrimagnetic Insulator GdTiO
D. J. Lovinger, E. Zoghlin, P. Kissin +8
In this work we investigate single crystal GdTiO, a promising candidate material for Floquet engineering and magnetic control, using ultrafast optical pump-probe reflectivity…
Order-Disorder Ferroelectric Transition of Strained SrTiO3
Salva Salmani-Rezaie, Kaveh Ahadi, William M. Strickland +1
SrTiO3 is an incipient ferroelectric that is believed to exhibit a prototype displacive, soft mode ferroelectric transition when subjected to mechanical stress or alloying. We use…
Correlating magnetic structure and magnetotransport in semimetal thin films of EuSmTiO
Zach Porter, Ryan F. Need, Kaveh Ahadi +6
We report on the evolution of the average and depth-dependent magnetic order in thin film samples of biaxially stressed and electron-doped EuTiO for samples across a doping ran…
Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
Timo Schumann, Luca Galletti, Hanbyeol Jeong +4
Superconductors that possess both broken spatial inversion symmetry and spin-orbit interactions exhibit a mix of spin singlet and triplet pairing. Here, we report on measurements o…
Ferroelectric enhancement of superconductivity in compressively strained SrTiO films
Ryan Russell, Noah Ratcliff, Kaveh Ahadi +3
SrTiO is an incipient ferroelectric on the verge of a polar instability, which is avoided at low temperatures by quantum fluctuations. Within this unusual quantum paraelectric…
Electron nematic fluid in a strained Sr3Ru2O7 film
Patrick B. Marshall, Kaveh Ahadi, Honggyu Kim +1
Sr3Ru2O7 belongs to the family of layered strontium ruthenates and exhibits a range of unusual emergent properties, such as electron nematic behavior and metamagnetism. Here, we sh…
Spontaneous Hall effects in the electron system at the SmTiO3/EuTiO3 interface
Kaveh Ahadi, Honggyu Kim, Susanne Stemmer
Magnetotransport and magnetism of epitaxial SmTiO3/EuTiO3 heterostructures grown by molecular beam epitaxy are investigated. It is shown that the polar discontinuity at the interfa…
Evidence of a topological Hall effect in EuSmTiO
Kaveh Ahadi, Luca Galletti, Susanne Stemmer
We report on the observation of a possible topological Hall effect in thin films of the itinerant ferromagnet Eu1-xSmxTiO3. EuTiO3 and Eu0.955Sm0.045TiO3 films were grown by molecu…
Response of the lattice across the filling-controlled Mott metal-insulator transition of a rare earth titanate
Honggyu Kim, Patrick B. Marshall, Kaveh Ahadi +3
The lattice response of a prototype Mott insulator, SmTiO3, to hole doping is investigated with atomic-scale spatial resolution. SmTiO3 films are doped with Sr on the Sm site with…