Browse Physics

Semiconductor alloys offer one way to improve the efficiency of solar cells.

A new topological insulator that approaches true insulating behavior in the bulk is synthesized.

New measurements of silicon nanostructures cast doubt on the possibility that they support a giant piezoresistive effect.

Dopant impurities may adversely affect the coherence of quantum bits in even highly purified silicon wafers.

Measuring the quantized magnetoelectric response in topological insulators could help establish precise values for basic physical constants.

Fractional quantum Hall effect is observed in a new system, a CdTe quantum well with strong intrinsic Zeeman energy.

Analog of gravitational lensing on the surface of a topological insulator.

Photoemission measurements challenge the picture that the electronic states on the surface of the topological insulator Bi2Se3 form a perfect Dirac cone.

Nuclear spins may enable enhanced control of electron spins in quantum information devices.

The phase coherence time of electrons in certain nanostructures may diverge at very low temperatures.

By doping the topological insulator Bi2Te3 with magnetic manganese, researchers have turned it into a dilute ferromagnetic semiconductor.

Microwave illumination of a high-mobility two-dimensional electron gas reveals quantum magneto-oscillations in both absorption coefficient and dc resistance.

Ever present fluctuations in semiconductors can be utilized as a demolition-free spectroscopic probe to study ultrafast spin dynamics.

Random disorder in topological insulators leads to an insulating phase reminiscent of one known for years in two-dimensional systems.

The finding of one-dimensional, topologically protected conducting states on the surface of bismuth suggests the possibility of a quantum spin Hall effect in one dimension.

The transport anomalies found in a bismuth alloy under moderate magnetic field might be the signature of unexpected many-body physics.

A new study is looking at how disorder affects the conducting states in a topological insulator—revealing one of many ways these unusual materials are different from conventional insulators.

Metallic contacts, which are unavoidable in any connection to an experimental measurement, cause asymmetries in the conductance of electrons and holes in graphene.