Department of Condensed Matter Physics
Eli Zeldov, Head
The scientific activity of the department is mainly concentrated around the experimental and theoretical research in quantum solid state physics. It includes experimental research of mesoscopic physics, quantum Hall physics, high temperature superconductors, two and one dimensional superconductors, metal-insulator transition, carbon nanotubes, semiconductor nanowires,and study of material growth. The theoretical efforts concentrate on similar subjects with added work on disordered materials, cold atoms, and quantum optics.
The Braun Center for sub micron research is an integral part of the department. It is a modern and well equipped center, with growth (three MBE's) and characterization systems, which allows to conduct experiments on sub micron semiconductor structures under high magnetic filed, normal and high temperature superconductors, and nanowires made of carbon nanotubes and semiconductor nanowires.
Optical spectroscopy of the two-dimensional electron gas in zero and strong magnetic fields.
Near field spectroscopy of semiconductor heterostructures.
Electron-hole complexes in quantum wells: Dynamics and steady state properties.
A. Finkelstein
Effects of the electron-electron interaction in low dimensional and disordered systems.
Metal-insulator transition in 2D conductors.
Magnetic fluctuations in high - Tc superconductors.
Y. Gefen
Low-dimensional interacting systems out of equilibrium.
Edge reconstruction and edge channels in the fractional quantum Hall effect and Topological Insulators.
Exotic excitations in the fractional quantum Hall effect and Topological Insulators.
Weak measurement, weak values and foundations of quantum mechanics.
Interferometry and dephasing with electronic and anyonic systems.
Fractional charges and their fractional statistics
M. Heiblum, students/postdocs, D. Mahalu, V. Umansky
- Charge and statistics of quasiparticles
- Bunching of quasiparticles
- quasiparticles and their behavior
- shot noise measurements
Interference and dephasing of electrons
M. Heiblum, students/postdocs, D. Mahalu, V. Umansky
- Phase measurements via a double path interferometer
- controlled dephasing
- Interferometers functioning in a high magnetic field, Mach-Zehnder Interferometer
Neutral mode transport
M. Heiblum, students/postdocs, D. Mahalu, V. Umansky
- downsteam and upstream neutral modes
- hole conjugate states
- even denomenator states
nanowires
M. Heiblum, andrey kritinin, anindya das, hadas shtrikman
- InAs wires
- ballistic transport
- incorporation with superconductors
Carbon nanoelectronics
Transport in ultra-clean carbon nanotubes
Nano-mechanics of carbon systems
Spin manipulation in carbon systems
Charge imaging on nanometer scales using scanning nanotube single electron transistors.
Two dimensional electron systems at the interface between oxides (LaAlO/SrTiO).
Y. Imry
Mesoscopic physics: persistent currents, classical and quantum fluctuations, quantum interference effects on transport, decoheherce.
Y. Imry, see below.Effects of interaction on localization and on single-electron resonances. Many-electron effects and phase-shifts. Dephasing of Quantum interference in mesoscopics. Quantum noise and its detection. Effects of quantum fluctuations on nanosuperconductors.
Y. Imry, Y. Levinson, A. Aharony and E. Entin-Wohlman (TAU and BGU), Y. Ovadyahu and A. schiller (HU), P. Silvestrov (Leiden), M. Schechter and P, Stamp (UBC).Atom-atom interactions in cold gasses and BEC
Resonant scattaring off photonic slabs
Non classical light.
Interaction of Squeezed Light with Atoms and Semiconductor Nanostructures
Full vector path integrals for light propagation in dielectrics.
The transmission phase shift through a quantum dot that is coupled to leads and forms a many body state (known as the Kondo resonance) is calculated. This work is related to experimental studies at the Braun Center for Submicron Research at the Weizmann I
A generalization of Hund’s rules to disordered dots.
Several aspects of disorder superconductors and normal metal - superconducting junctions are studied, including the interplay between bosons and fermions in this system.
Luttinger liquids in one-dimensional systems.
Bi-layer systems.
Experiments on materials at ultra low-temperatures.
Scanning tunneling experiments at ultra-low temperatures
Physics of electron's spin
Quantum phase transitions: General transport studies and mesoscopics of the metal-insulator, superconductor-insulator and other transitions.
Fractional and integer quantum Hall effect and related phenomena.
A. Stern
Fractionalized topological phases - how to construct them, how to measure them, and how to use them for topological quantum computation
Non-abelian electronic states - quantum Hall states, topological superconductors and Majorana fermions.
Quantum interference phenomena in the fractional Quantum Hall effect. Electronic transport in strong magnetic fields.
Low density two dimensional electronic systems.
One dimensional electronic systems - electronic transport in the presence of interactions.
Scanning nano-SQUID microscopy
High-temperature superconductors
Vortex matter phase transitions
Nano-structured superconductors
Vortex dynamics
Magneto-optical imaging