Quantum spin pumping for a system with competing exchange interactions

We study the quantum spin pumping of an antiferromagnetic spin-1/2 chain with competing exchange interactions. We show that spatially periodic potential modulated in space and time acts as a quantum spin pump. In our model system, an applied electric field causes a spin gap to its critical ground st...

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Bibliographic Details
Main Authors: Sarkar, Sujit, Hu, C D
Format: Conference Proceeding
Language:English
Subjects:
ANTIFERROMAGNETISM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRIC FIELDS
ELECTROMAGNETIC FIELDS
EXCHANGE INTERACTIONS
GROUND STATES
MATERIALS SCIENCE
PERIODICITY
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POTENTIALS
SPIN
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Summary:We study the quantum spin pumping of an antiferromagnetic spin-1/2 chain with competing exchange interactions. We show that spatially periodic potential modulated in space and time acts as a quantum spin pump. In our model system, an applied electric field causes a spin gap to its critical ground state by introducing bond-alternation exchange interactions.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2928927