A5005627642- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Semiconductor materials and devices
- Magnetic and transport properties of perovskites and related materials
- Parallel Computing and Optimization Techniques
- Advanced Memory and Neural Computing
- Ferroelectric and Negative Capacitance Devices
- Quasicrystal Structures and Properties
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Condensed Matter Physics
- Molecular Junctions and Nanostructures
- Distributed and Parallel Computing Systems
- Chemistry and Stereochemistry Studies
- Topological Materials and Phenomena
- Ferroelectric and Piezoelectric Materials
- Advanced Materials Characterization Techniques
- Intellectual Property Law
- Scientific Computing and Data Management
- Acoustic Wave Resonator Technologies
- Semiconductor Lasers and Optical Devices
- Advanced NMR Techniques and Applications
- Quantum chaos and dynamical systems
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
- Diamond and Carbon-based Materials Research
University of Pittsburgh
2018-2024
Pittsburgh Quantum Institute
2018-2024
SrTiO3-based heterointerfaces support quasi-two-dimensional (2D) electron systems that are analogous to III–V semiconductor heterostructures, but also possess superconducting, magnetic, spintronic, ferroelectric, and ferroelastic degrees of freedom. Despite these rich properties, the relatively low mobilities 2D complex-oxide interfaces appear preclude ballistic transport in 1D. Here we show LaAlO3/SrTiO3 interface can quantized electrons (nonsuperconducting) pairs within quasi-1D structures...
An unusual conductance sequence Effects of correlations between electrons are enhanced in systems reduced dimensions. The two-dimensional interface two oxide materials, lanthanum aluminate (LaAlO 3 ) and strontium titanate (SrTiO ), exhibits magnetism superconductivity. In even lower-dimensional fabricated similar heterostructures, can pair without going superconducting. Briggeman et al. have now observed another exotic effect LaAlO /SrTiO waveguides: At certain magnetic fields, the these...
Quantum materials (QMs) with strong correlation and nontrivial topology are indispensable to next-generation information computing technologies. Exploitation of topological band structure is an ideal starting point realize correlated QMs. Here, we report that strain-induced symmetry modification in oxide SrNbO3 thin films creates emerging structure. Dirac electrons strained reveal ultrahigh mobility (μmax ≈ 100,000 cm2/Vs), exceptionally small effective mass (m* ~ 0.04me), nonzero Berry...
The origin and function of chirality in DNA, proteins, other building blocks life represent a central question biology. Observations spin polarization magnetization associated with electron transport through chiral molecules, known collectively as the induced selectivity (CISS) effect, suggest that improves transfer by inhibiting backscattering. Meanwhile, role coherence within nanowires is believed to be important but challenging investigate experimentally. Using reconfigurable nanoscale...
Abstract Advancements in materials synthesis have been key to unveil the quantum nature of electronic properties solids by providing experimental reference points for a correct theoretical description. Here, we report hidden transport phenomena emerging ultraclean limit archetypical correlated electron system SrVO 3 . The low temperature, magnetic field was found be dominated anisotropic scattering, whereas, at high find yet undiscovered phase that exhibits clear deviations from expected...
The quest to understand, design, and synthesize new forms of quantum matter guides much contemporary research in condensed physics. One-dimensional (1D) electronic systems form the basis for some most interesting exotic phases matter. variety experimentally-accessible ballistic 1D is highly restricted, furthermore these typically have few tuning parameters other than electric magnetic fields. However, electron waveguides formed from two-dimensional (2D) LaAlO$_3$/SrTiO$_3$ heterointerfaces...
SrTiO$_3$-based heterointerfaces support quasi-two-dimensional (2D) electron systems that are analogous to III-V semiconductor heterostructures, but also possess superconducting, magnetic, spintronic, ferroelectric, and ferroelastic degrees of freedom. Despite these rich properties, the relatively low mobilities 2D complex-oxide interfaces appear preclude ballistic transport in 1D. Here we show LaAlO$_3$/SrTiO$_3$ interface can quantized electrons (non-superconducting) pairs within quasi-1D...
A nanoscale cross, written at the LaAlO<sub>3</sub>/SrTiO<sub>3</sub> interface using conductive AFM lithography, reveals an inhomogeneous electronic band structure.
Understanding and controlling the transport properties of interacting fermions is a key forefront in quantum physics across variety experimental platforms. Motivated by recent experiments 1D electron channels written on $\mathrm{LaAlO_3}$/$\mathrm{SrTiO_3}$ interface, we analyse how presence different forms spin-orbit coupling (SOC) can enhance pairing waveguides. We first show intrinsic Rashba SOC felt electrons at interfaces such as be reduced when they are confined 1D. Then, discuss...
Abstract Strongly correlated electronic systems exhibit a wealth of unconventional behavior stemming from strong electron-electron interactions. The LaAlO 3 /SrTiO (LAO/STO) heterostructure supports rich and varied low-temperature transport characteristics including low-density superconductivity, electron pairing without superconductivity for which the microscopic origins is still not understood. LAO/STO also exhibits inexplicable signatures nematicity via nonlinear anomalous Hall effects....
We report Aharonov-Bohm (AB)-type quantum interference in simply-connected devices created at the LaAlO$_3$/SrTiO$_3$ interface using conductive-atomic force microscope (c-AFM) lithography. The oscillations are multi-periodic functions of magnetic field strength, and they exhibit a substantial hysteresis with frequencies that depends on sweep direction. oscillation amplitude for lowest two approaches $e^2/h$, consistent theoretical maximum AB effect, harmonics up to third order observable....
The strongly correlated two-dimensional electron liquid within SmTiO$_3$/SrTiO$_3$/SmTiO$_3$ quantum well structures exhibits a pseudogap phase when the width is sufficiently narrow. Using low-temperature transport and optical experiments that drive quantum-well system out of equilibrium, we find evidence mobile, long-lived, negatively-charged quasiparticles, consistent with idea arises from bound pairs.
The strongly correlated two-dimensional electron liquid within ${\mathrm{SmTiO}}_{3}/{\mathrm{SrTiO}}_{3}/{\mathrm{SmTiO}}_{3}$ quantum well structures exhibits a pseudogap phase when the width is sufficiently narrow. Using low-temperature transport and optical experiments that drive quantum-well system out of equilibrium, we find evidence mobile, long-lived, negatively charged quasiparticles, consistent with idea arises from bound pairs. These experimental results establish connection...