Revealing novel quantum phases in quantum antiferromagnets on random lattices
Quantum magnets represent an ideal playground for the controlled realization of novel quantum phases and of quantum phase transitions. The Hamiltonian of the system can be indeed manipulated by applying a magnetic field or pressure on the sample. When doping the system with non-magnetic impurities,...
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| Format: | Article |
| Language: | English |
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Institute for Condensed Matter Physics
2009-01-01
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| Series: | Condensed Matter Physics |
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| Online Access: | http://dx.doi.org/10.5488/CMP.12.3.519 |
| _version_ | 1819030472563359744 |
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| author | R. Yu S. Haas T. Roscilde |
| author_facet | R. Yu S. Haas T. Roscilde |
| author_sort | R. Yu |
| collection | DOAJ |
| description | Quantum magnets represent an ideal playground for the controlled realization of novel quantum phases and of quantum phase transitions. The Hamiltonian of the system can be indeed manipulated by applying a magnetic field or pressure on the sample. When doping the system with non-magnetic impurities, novel inhomogeneous phases emerge from the interplay between geometric randomness and quantum fluctuations. In this paper we review our recent work on quantum phase transitions and novel quantum phases realized in disordered quantum magnets. The system inhomogeneity is found to strongly affect phase transitions by changing their universality class, giving the transition a novel, quantum percolative nature. Such transitions connect conventionally ordered phases to unconventional, quantum disordered ones - quantum Griffiths phases, magnetic Bose glass phases - exhibiting gapless spectra associated with low-energy localized excitations. |
| first_indexed | 2024-12-21T06:30:42Z |
| format | Article |
| id | doaj.art-9eba958d848e4c4e8ac6cbb3492c6b8e |
| institution | Directory Open Access Journal |
| issn | 1607-324X |
| language | English |
| last_indexed | 2024-12-21T06:30:42Z |
| publishDate | 2009-01-01 |
| publisher | Institute for Condensed Matter Physics |
| record_format | Article |
| series | Condensed Matter Physics |
| spelling | doaj.art-9eba958d848e4c4e8ac6cbb3492c6b8e2022-12-21T19:13:01ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2009-01-01123519530Revealing novel quantum phases in quantum antiferromagnets on random latticesR. YuS. HaasT. RoscildeQuantum magnets represent an ideal playground for the controlled realization of novel quantum phases and of quantum phase transitions. The Hamiltonian of the system can be indeed manipulated by applying a magnetic field or pressure on the sample. When doping the system with non-magnetic impurities, novel inhomogeneous phases emerge from the interplay between geometric randomness and quantum fluctuations. In this paper we review our recent work on quantum phase transitions and novel quantum phases realized in disordered quantum magnets. The system inhomogeneity is found to strongly affect phase transitions by changing their universality class, giving the transition a novel, quantum percolative nature. Such transitions connect conventionally ordered phases to unconventional, quantum disordered ones - quantum Griffiths phases, magnetic Bose glass phases - exhibiting gapless spectra associated with low-energy localized excitations.http://dx.doi.org/10.5488/CMP.12.3.519Heisenberg antiferromagnetsquantum disordergeometric randomnesspercolationBose glass |
| spellingShingle | R. Yu S. Haas T. Roscilde Revealing novel quantum phases in quantum antiferromagnets on random lattices Condensed Matter Physics Heisenberg antiferromagnets quantum disorder geometric randomness percolation Bose glass |
| title | Revealing novel quantum phases in quantum antiferromagnets on random lattices |
| title_full | Revealing novel quantum phases in quantum antiferromagnets on random lattices |
| title_fullStr | Revealing novel quantum phases in quantum antiferromagnets on random lattices |
| title_full_unstemmed | Revealing novel quantum phases in quantum antiferromagnets on random lattices |
| title_short | Revealing novel quantum phases in quantum antiferromagnets on random lattices |
| title_sort | revealing novel quantum phases in quantum antiferromagnets on random lattices |
| topic | Heisenberg antiferromagnets quantum disorder geometric randomness percolation Bose glass |
| url | http://dx.doi.org/10.5488/CMP.12.3.519 |
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