147 citations · 834 across the 38 of their papers we have counts for
42 papers
Mapping Strain and Spatial-Modulation Phase from Local Wave Vectors in Scanning Tunneling Microscopy
Xinze Yang, Sandra Sajan, Maria N. Gastiasoro +2
Spatially varying lattice distortions can produce local changes in electronic properties that are obscured by measurements averaging over extended regions. With its atomic-scale sp…
Two-phonon pairing and superconductivity in
Antonio Santacesaria, Cristiano Muzzi, Maria Eleonora Temperini +3
We explore the possibility that the two-phonon pairing mechanism proposed by Ngai can explain superconductivity in doped strontium titanate (STO). The two-phonon deformation potent…
Stacking-tuned superconductivity and competing charge-density-wave states in NbSe
Sandra Sajan, Xinze Yang, Haojie Guo +9
Layer stacking provides a powerful yet underexplored route for reshaping collective quantum order in van der Waals materials. Here we use high-resolution scanning tunneling microsc…
Spin-chiral electron-phonon coupling in metallic strontium titanate
N. Somun, L. Rogić, I. Khayr +12
Electron-phonon coupling (EPC) - the interaction between conduction electrons and quantized atomic vibrations - plays a central role in condensed matter physics and determines some…
Ferroaxial and nematic transitions in the charge density wave phase of 1T-TiSe
Sarah Edwards, Elliott Rosenberg, Ilaria Maccari +9
Charge density waves (CDWs) with multi-component order parameters can break unexpected symmetries through the interplay of nearly degenerate instabilities. In the widely investigat…
Moiré-induced symmetry breaking of charge order in van der Waals heterostructures
Sandra Sajan, Laura Pätzold, Tarushi Agarwal +10
Layered materials that stack different lattice symmetries are rare in nature. Misfit layered chalcogenides, which combine square and hexagonal lattices of rocksalt monochalcogenide…
Spin-dependent anisotropic electron-phonon coupling in KTaO
Giulia Venditti, Francesco Macheda, Paolo Barone +2
KTaO (KTO) is an incipient ferroelectric, characterized by a softening of the lowest transverse optical (TO) mode with decreasing temperature. Cooper pairing in the recently di…
Gapless superconductivity from extremely dilute magnetic disorder in 2H-NbSe2-xSx
Jose Antonio Moreno, Mercè Roig, Víctor Barrena +14
Most superconducting materials exhibit a vanishing density of states at the Fermi level and Anderson's theorem posits that the superconducting gap is robust against nonmagnetic dis…
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…
Layer-selective Cooper pairing in an alternately stacked transition metal dichalcogenide
Haojie Guo, Sandra Sajan, Irián Sánchez-Ramírez +9
Multigap superconductivity emerges when superconducting gaps form on distinct Fermi surfaces. Arising from locally overlapping atomic orbitals, multiple superconducting bands intro…
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…
Strong Coupling Theory of Superconductivity and Ferroelectric Quantum Criticality in metallic SrTiO
Sudip Kumar Saha, Maria N. Gastiasoro, Jonathan Ruhman +1
Superconductivity in doped SrTiO has remained an enduring mystery for over 50 years. The material's status as a ``quantum" ferroelectric metal, characterized by a soft polar mo…
Ising domain wall networks from intertwined charge density waves in single-layer TiSe2
Wen Wan, Maria N. Gastiasoro, Daniel Muñoz-Segovia +3
When the period of an incommensurate charge density wave (ICDW) approaches an integer multiple of a lattice vector, the energy gain obtained from locking the period to the lattice…
Electronic spin susceptibility in metallic strontium titanate
A. Najev, N. Somun, M. Spaić +5
Metallic strontium titanate (SrTiO) is known to have both normal-state and superconducting properties that vary strongly over a wide range of charge carrier densities. This ind…
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…
Anisotropic Rashba coupling to polar modes in KTaO3
Giulia Venditti, Maria Eleonora Temperini, Paolo Barone +2
Motivated by the discovery of superconductivity in KTaO3-based heterostructures, we study a pairing mechanism based on spin-orbit assisted coupling between the conduction electrons…
Generalized Rashba Electron-Phonon Coupling and Superconductivity in Strontium Titanate
Maria N. Gastiasoro, Maria Eleonora Temperini, Paolo Barone +1
SrTiO3 is known for its proximity to a ferroelectric phase and for showing an 'optimal' doping for superconductivity with a characteristic dome-like behaviour resembling systems cl…
Strength of Correlations in a Silver Based Cuprate Analogue
Riccardo Piombo, Daniel Jezierski, Henrique Perin Martins +10
AgF2 has been proposed as a cuprate analogue which requires strong correlation and marked covalence. On the other hand, fluorides are usually quite ionic and 4d transition metals t…
Charge doping to flat AgF2 monolayers in a chemical capacitor setup
Daniel Jezierski, Adam Grzelak, XiaoQiang Liu +5
Flat monolayers of silver II fluoride, which could be obtained by epitaxial deposition on an appropriate substrate, have been recently predicted to exhibit very strong antiferromag…
Theory of superconductivity mediated by Rashba coupling in incipient ferroelectrics
Maria N. Gastiasoro, Maria Eleonora Temperini, Paolo Barone +1
Experimental evidence suggests that superconductivity in SrTiO is mediated by a soft transverse ferroelectric mode which, according to conventional theories, has negligible cou…
Anomalous Transport in High-Mobility Superconducting SrTiO Thin Films
Jin Yue, Yilikal Ayino, Tristan K. Truttmann +9
The study of subtle effects on transport in semiconductors requires high-quality epitaxial structures with low defect density. Using hybrid molecular beam epitaxy (MBE), SrTiO…
Anisotropic superconductivity mediated by ferroelectric fluctuations in cubic systems with spin-orbit coupling
Maria N. Gastiasoro, Thaís V. Trevisan, Rafael M. Fernandes
Motivated by the experimental observation that superconductivity in bulk doped SrTiO is enhanced as a putative ferroelectric quantum critical point (FE-QCP) is approached, we…
Superconductivity in dilute SrTiO: a review
Maria N. Gastiasoro, Jonathan Ruhman, Rafael M. Fernandes
Doped SrTiO, one of the most dilute bulk systems to display superconductivity, is perhaps the first example of an unconventional superconductor, as it does not fit into the sta…
Phonon mediated superconductivity in low carrier-density systems
Maria N. Gastiasoro, Andrey V. Chubukov, Rafael M. Fernandes
Motivated by the observation of superconductivity in SrTiO and Bi, we analyze phonon-mediated superconductivity in three-dimensional systems at low carrier density, when the ch…