Chapter 2: Quantum Point Contacts

摘要: Publisher Summary This chapter presents a discussion on quasi-one-dimensional quantum transport. Only few years ago, prevalent feeling was that there is “limited purpose in elaborating playful one-dimensional models” for situation has changed drastically since the realization of point contact, which offers ample opportunity to study transport problems textbook simplicity solid state. The reviews experimental and theoretical work by Philips-Delft collaboration electrical through contacts. These are short narrow constrictions two-dimensional electron gas (2DEG), with width order Fermi wavelength λ F . Because high mobility, elastic impurity scattering, inelastic scattering secondary importance ballistic adiabatic regimes. Scattering determined instead geometry sample boundary. concept mean free path thus loses much its meaning, serves only as an indication length scale can be realized.