Quantum renormalization of the spin Hall effect.

نویسندگان

  • Bo Gu
  • Jing-Yu Gan
  • Nejat Bulut
  • Timothy Ziman
  • Guang-Yu Guo
  • Naoto Nagaosa
  • Sadamichi Maekawa
چکیده

By quantum Monte Carlo simulation of a realistic multiorbital Anderson impurity model, we study the spin-orbit interaction (SOI) of an Fe impurity in Au host metal. We show, for the first time, that the SOI is strongly renormalized by the quantum spin fluctuation. Based on this mechanism, we can explain why the gigantic spin Hall effect in Au with Fe impurities was observed in recent experiments, while it is not visible in the anomalous Hall effect. In addition, we show that the SOI is strongly renormalized by the Coulomb correlation U. Based on this picture, we can explain past discrepancies in the calculated orbital angular momenta for an Fe impurity in an Au host.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

1 Large N Spin Quantum Hall Effect

We introduce a large N version of the spin quantum Hall transition problem. It is formulated as a problem of Dirac fermions coupled to disorder, whose Hamiltonian belong to the symmetry class C. The fermions carry spin degrees of freedom valued in the algebra sp(2N), the spin quantum Hall effect corresponding to N = 1. Arguments based on renormalization group transformations as well as on a sig...

متن کامل

Large N Spin Quantum Hall Effect

We introduce a large N version of the spin quantum Hall transition problem. It is formulated as a problem of Dirac fermions coupled to disorder, whose Hamiltonian belong to the symmetry class C. The fermions carry spin degrees of freedom valued in the algebra sp(2N), the spin quantum Hall effect corresponding to N = 1. Arguments based on renormalization group transformations as well as on a sig...

متن کامل

0 Spin - Charge Separation and the Spin Quantum Hall Effect

We use quantum field theory methods to study the network model for the spin quantum hall transition. When the couplings are fine tuned in a certain way, the spin and charge degrees of freedom, corresponding to the supercurrent algebras su(2)0 and osp(2|2)−2 respectively, completely decouple. This simpler theory is exactly solvable and some critical exponents are computed and shown to agree with...

متن کامل

Quasi - Spin - Charge Separation and the Spin Quantum Hall Effect

We use quantum field theory methods to study the network model for the spin quantum Hall transition. When the couplings are fine tuned in a certain way, the spin and charge degrees of freedom, corresponding to the supercurrent algebras su(2)0 and osp(2|2)−2 respectively, decouple in the renormalization group flow. The infrared fixed point of this simpler theory is the coset osp(4|4)1/su(2)0 whi...

متن کامل

مقدمه‌ای بر سیستمهای اسپینی کوانتمی

This manuscript is the collection of lectures given in the summer school on strongly correlated electron systems held at Isfahan university of technology, June 2007. A short overview on quantum magnetism and spin systems is presented. The numerical exact diagonalization (Lanczos) alghorithm is explained in a pedagogical ground. This is a method to get some ground state properties on finite clus...

متن کامل

Domain Formation in ν = 2 / 3 Fractional Quantum Hall Systems

We study the domain formation in the ν = 2/3 fractional quantum Hall systems basing on the density matrix renormalization group (DMRG) analysis. The ground-state energy and the pair correlation functions are calculated for various spin polarizations. The results confirm the domain formation in partially spin polarized states, but the presence of the domain wall increases the energy of partially...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Physical review letters

دوره 105 8  شماره 

صفحات  -

تاریخ انتشار 2010