B. L. Altshuler

B. L. Altshuler; L. B. Ioffe; Andrew J. Millis

We calculate the fermion Green function and particle-hole susceptibilities for a degenerate two-dimensional fermion system with a singular gauge interaction. We show that this is a strong-coupling problem, with no small parameter other than the fermion spin degeneracy N. We consider two interactions, one arising in the context of the t-J model and the other in the theory of half-filled Landau level. For the fermion self-energy we show that the qualitative behavior found in the leading order of perturbation theory is preserved to all orders in the interaction. The susceptibility

Alexander V. Balatsky; B. L. Altshuler

{mathrm{ensuremath{chi}}}_{mathit{Q}}

Oded Agam; B. L. Altshuler; A. V. Andreev

at a general wave vector Qensuremath{ne}2

Alexander V. Balatsky; Anders Rosengren; B. L. Altshuler

{mathbf{p}}_{mathbf{F}}

B. D. Simons; Lee Pa; B. L. Altshuler

retains the Fermi-liquid form. However, the 2

Eduardo R. Mucciolo; Rodrigo B. Capaz; B. L. Altshuler; John D. Joannopoulos

{mathit{p}}_{mathit{F}}

Eduardo R. Mucciolo; B. S. Shastry; B. D. Simons; B. L. Altshuler

susceptibility

Eduardo R. Mucciolo; Vladimir N. Prigodin; B. L. Altshuler

{mathrm{ensuremath{chi}}}_{2mathit{p}mathit{F}}

B. L. Altshuler; L. B. Ioffe; A. I. Larkin; Andrew J. Millis

either diverges as Tensuremath{rightarrow}0 or remains finite but with nonanalytic wave-vector, frequency, and temperature dependence. We express our results in the language of recently discussed scaling theories, give the fixed-point action, and show that at this fixed point the fermion-gauge-field interaction is marginal in d=2, but irrelevant at low energies in densuremath{ge}2.

Nobuhiko Taniguchi; Akikazu Hashimoto; B. D. Simons; B. L. Altshuler

Spin-orbit interaction produces persistent spin and mass currents in a ring via the Aharonov-Casher effect. An experiment in the 3 He-A 1 phase in which this effect leads to the excitation of mass and spin supercurrent is proposed