The Berry phase in frustrated spin glass

نویسنده

  • Dipti Banerjee
چکیده

In this letter we have pointed out that frustration in spin glass is realized through the Berry phase due to the conflict between the spin ordering in the course of parallel transport of spinor. We have came to the point that the Berry phase depicting the chiral change of helicity of a quantized spinor is prominent only in the presence of frustration.

برای دانلود 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

Spin-glass and antiferromagnet critical behavior in a diluted fcc antiferromagnet.

We report on a Monte Carlo study of a diluted Ising antiferromagnet on a fcc lattice. This is a typical model example of a highly frustrated antiferromagnet, and we ask whether sufficient random dilution of spins does produce a spin-glass phase. Our data strongly indicate the existence of a spin-glass transition for spin concentration p,0.75: We find a divergent spin-glass susceptibility and a ...

متن کامل

Spin glass behavior upon diluting frustrated magnets and spin liquids: a Bethe-Peierls treatment

A Bethe-Peierls treatment to dilution in short range frustrated magnets and spin liquids is given. The ferromagnetic bonds of a Cayley tree are diluted and a next nearest neighbor antiferromagnetic coupling is added by completing the triangles in a Husimi cactus fashion. A spin glass phase is present at low temperatures and close to the percolation point as soon as frustration is switched on in...

متن کامل

Precursor phenomena in frustrated systems.

To understand the origin of the dynamical transition, between high-temperature exponential relaxation and low-temperature nonexponential relaxation, that occurs well above the static transition in glassy systems, a frustrated spin model, with and without disorder, is considered. The model has two phase transitions, the lower being a standard spin glass transition (in the presence of disorder) o...

متن کامل

Hall effect of spin waves in frustrated magnets.

We examine a possible spin Hall effect for localized spin systems with no charge degrees of freedom. In this scenario, a longitudinal magnetic field gradient induces a transverse spin current carried by spin wave excitations with an anomalous velocity which is caused by a topological Berry-phase effect associated with spin chirality, in analogy with anomalous Hall effects in itinerant electron ...

متن کامل

Frustrated Heisenberg antiferromagnets: fluctuation in- duced first order vs deconfined quantum criticality

– Recently it was argued that quantum phase transitions can be radically different from classical phase transitions with as a highlight the ’deconfined critical points’ exhibiting fractionalization of quantum numbers due to Berry phase effects. Such transitions are supposed to occur in frustrated (’J1-J2’) quantum magnets. We have developed a novel renormalization approach for such systems whic...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008