Quantum fluctuations in high field magnetization of 2D square lattice J1-J2 antiferromagnets

JP Carlo; YJ Uemura; T Goko; GJ MacDougall; JA Rodriguez; W Yu; GM Luke; P Dai; NSP Shannon; S Miyasaka; S Suzuki; S Tajima; GF Chen; WZ Hu; JL Luo; NL Wang

doi:10.1103/PhysRevB.77.104441

Quantum fluctuations in high field magnetization of 2D square lattice J₁-J₂ antiferromagnets

JP Carlo, YJ Uemura, T Goko, GJ MacDougall, JA Rodriguez, W Yu, GM Luke, P Dai, NSP Shannon, S Miyasaka, S Suzuki, S Tajima, GF Chen, WZ Hu, JL Luo, NL Wang

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

32 Citations (Scopus)

Abstract

The J1-J2 square lattice Heisenberg model with spin S=1/2 has exchange bonds both along sides (J1) and along diagonals (J2) of the square. It exhibits three phases with long-range magnetic order and two unconventionally ordered phases depending on the ratio J2/J1 of exchange constants. It describes a number of recently found layered vanadium oxide compounds. A simple means of investigating the ground state is the study of the magnetization curve and high field susceptibility. We discuss these quantities by using the second-order spin-wave theory and the exact diagonalization in the whole J1-J2 plane. We compare both results and find good overall agreement in the sectors of the phase diagram with magnetic order. Close to the disordered regions, the magnetization curve shows strong deviations from the classical linear behavior caused by large quantum fluctuations, and the spin-wave approximation breaks down. On the ferromagnet side (J1

Translated title of the contribution	Quantum fluctuations in high field magnetization of 2D square lattice J₁-J₂ antiferromagnets
Original language	English
Pages (from-to)	104441-1 - 104441-11
Number of pages	11
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	77
DOIs	https://doi.org/10.1103/PhysRevB.77.104441
Publication status	Published - Mar 2008

Bibliographical note

Publisher: The American Physical Society

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Carlo, JP., Uemura, YJ., Goko, T., MacDougall, GJ., Rodriguez, JA., Yu, W., Luke, GM., Dai, P., Shannon, NSP., Miyasaka, S., Suzuki, S., Tajima, S., Chen, GF., Hu, WZ., Luo, JL., & Wang, NL. (2008). Quantum fluctuations in high field magnetization of 2D square lattice J₁-J₂ antiferromagnets. Physical Review B: Condensed Matter and Materials Physics, 77, 104441-1 - 104441-11. https://doi.org/10.1103/PhysRevB.77.104441

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title = "Quantum fluctuations in high field magnetization of 2D square lattice J1-J2 antiferromagnets",

abstract = "The J1-J2 square lattice Heisenberg model with spin S=1/2 has exchange bonds both along sides (J1) and along diagonals (J2) of the square. It exhibits three phases with long-range magnetic order and two unconventionally ordered phases depending on the ratio J2/J1 of exchange constants. It describes a number of recently found layered vanadium oxide compounds. A simple means of investigating the ground state is the study of the magnetization curve and high field susceptibility. We discuss these quantities by using the second-order spin-wave theory and the exact diagonalization in the whole J1-J2 plane. We compare both results and find good overall agreement in the sectors of the phase diagram with magnetic order. Close to the disordered regions, the magnetization curve shows strong deviations from the classical linear behavior caused by large quantum fluctuations, and the spin-wave approximation breaks down. On the ferromagnet side (J1",

author = "JP Carlo and YJ Uemura and T Goko and GJ MacDougall and JA Rodriguez and W Yu and GM Luke and P Dai and NSP Shannon and S Miyasaka and S Suzuki and S Tajima and GF Chen and WZ Hu and JL Luo and NL Wang",

note = "Publisher: The American Physical Society",

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doi = "10.1103/PhysRevB.77.104441",

language = "English",

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journal = "Physical Review B: Condensed Matter and Materials Physics",

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Carlo, JP, Uemura, YJ, Goko, T, MacDougall, GJ, Rodriguez, JA, Yu, W, Luke, GM, Dai, P, Shannon, NSP, Miyasaka, S, Suzuki, S, Tajima, S, Chen, GF, Hu, WZ, Luo, JL & Wang, NL 2008, 'Quantum fluctuations in high field magnetization of 2D square lattice J₁-J₂ antiferromagnets', Physical Review B: Condensed Matter and Materials Physics, vol. 77, pp. 104441-1 - 104441-11. https://doi.org/10.1103/PhysRevB.77.104441

TY - JOUR

T1 - Quantum fluctuations in high field magnetization of 2D square lattice J1-J2 antiferromagnets

AU - Carlo, JP

AU - Uemura, YJ

AU - Goko, T

AU - MacDougall, GJ

AU - Rodriguez, JA

AU - Yu, W

AU - Luke, GM

AU - Dai, P

AU - Shannon, NSP

AU - Miyasaka, S

AU - Suzuki, S

AU - Tajima, S

AU - Chen, GF

AU - Hu, WZ

AU - Luo, JL

AU - Wang, NL

N1 - Publisher: The American Physical Society

PY - 2008/3

Y1 - 2008/3

N2 - The J1-J2 square lattice Heisenberg model with spin S=1/2 has exchange bonds both along sides (J1) and along diagonals (J2) of the square. It exhibits three phases with long-range magnetic order and two unconventionally ordered phases depending on the ratio J2/J1 of exchange constants. It describes a number of recently found layered vanadium oxide compounds. A simple means of investigating the ground state is the study of the magnetization curve and high field susceptibility. We discuss these quantities by using the second-order spin-wave theory and the exact diagonalization in the whole J1-J2 plane. We compare both results and find good overall agreement in the sectors of the phase diagram with magnetic order. Close to the disordered regions, the magnetization curve shows strong deviations from the classical linear behavior caused by large quantum fluctuations, and the spin-wave approximation breaks down. On the ferromagnet side (J1

AB - The J1-J2 square lattice Heisenberg model with spin S=1/2 has exchange bonds both along sides (J1) and along diagonals (J2) of the square. It exhibits three phases with long-range magnetic order and two unconventionally ordered phases depending on the ratio J2/J1 of exchange constants. It describes a number of recently found layered vanadium oxide compounds. A simple means of investigating the ground state is the study of the magnetization curve and high field susceptibility. We discuss these quantities by using the second-order spin-wave theory and the exact diagonalization in the whole J1-J2 plane. We compare both results and find good overall agreement in the sectors of the phase diagram with magnetic order. Close to the disordered regions, the magnetization curve shows strong deviations from the classical linear behavior caused by large quantum fluctuations, and the spin-wave approximation breaks down. On the ferromagnet side (J1

U2 - 10.1103/PhysRevB.77.104441

DO - 10.1103/PhysRevB.77.104441

M3 - Article (Academic Journal)

SN - 1550-235X

VL - 77

SP - 104441-1 - 104441-11

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

ER -