Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl).
The magnetoabsorption of millimeter-wave radiation by single crystals of the organic metals α-(BEDT-TTF)2TlHg(SCN)4 and α-(BEDT-TTF)2KHg(SCN)4 has been studied in the frequency range 30-120 GHz. The experiments reveal two dominant contributions to the magnetoabsorption spectra. The first is interpre...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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1996
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| _version_ | 1826291812144250880 |
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| author | Demishev, S Semeno, A Sluchanko, N Samarin, N Voskoboinikov, I Glushkov, V Singleton, J Blundell, S Hill, S Hayes, W Kartsovnik, M Kovalev, A Kurmoo, M Day, P Kushch, N |
| author_facet | Demishev, S Semeno, A Sluchanko, N Samarin, N Voskoboinikov, I Glushkov, V Singleton, J Blundell, S Hill, S Hayes, W Kartsovnik, M Kovalev, A Kurmoo, M Day, P Kushch, N |
| author_sort | Demishev, S |
| collection | OXFORD |
| description | The magnetoabsorption of millimeter-wave radiation by single crystals of the organic metals α-(BEDT-TTF)2TlHg(SCN)4 and α-(BEDT-TTF)2KHg(SCN)4 has been studied in the frequency range 30-120 GHz. The experiments reveal two dominant contributions to the magnetoabsorption spectra. The first is interpreted as the cyclotron resonance of two-dimensional carriers, and is characterized by broad lines (linewidth/magnetic field ΔB/B∼0.5-1). In addition to a resonance exhibiting a cyclotron mass mc∼2.8m0, there are two further lines corresponding to frequency-dependent cyclotron masses in the ranges mc∼(1-1.5)m0 and mc∼(0.5-0.8)m0. This frequency dependence is believed to result from many-body effects. The second contribution to the magnetoabsorption is formed by a series of narrow lines with ΔB/B∼0.03-0.1 and amplitudes 5-10 times smaller than the features interpreted as cyclotron resonances. These narrow lines are attributed to a superposition of modes due to antiferromagnetic resonance and conduction-electron-spin resonance (ESR). The feature characteristic of antiferromagnetic resonance is the presence of a mode with a frequency that decreases with increasing magnetic field. The magnetoabsorption structure attributed to ESR consists of a relatively broad maximum upon which a sharp dip is superimposed. This behavior is believed to be analogous to the resonant transparency observed in thin metallic films undergoing ESR. |
| first_indexed | 2024-03-07T03:05:05Z |
| format | Journal article |
| id | oxford-uuid:b238f18b-c58b-4e09-ba44-eaea45270cde |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:05:05Z |
| publishDate | 1996 |
| record_format | dspace |
| spelling | oxford-uuid:b238f18b-c58b-4e09-ba44-eaea45270cde2022-03-27T04:10:15ZResonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl).Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b238f18b-c58b-4e09-ba44-eaea45270cdeEnglishSymplectic Elements at Oxford1996Demishev, SSemeno, ASluchanko, NSamarin, NVoskoboinikov, IGlushkov, VSingleton, JBlundell, SHill, SHayes, WKartsovnik, MKovalev, AKurmoo, MDay, PKushch, NThe magnetoabsorption of millimeter-wave radiation by single crystals of the organic metals α-(BEDT-TTF)2TlHg(SCN)4 and α-(BEDT-TTF)2KHg(SCN)4 has been studied in the frequency range 30-120 GHz. The experiments reveal two dominant contributions to the magnetoabsorption spectra. The first is interpreted as the cyclotron resonance of two-dimensional carriers, and is characterized by broad lines (linewidth/magnetic field ΔB/B∼0.5-1). In addition to a resonance exhibiting a cyclotron mass mc∼2.8m0, there are two further lines corresponding to frequency-dependent cyclotron masses in the ranges mc∼(1-1.5)m0 and mc∼(0.5-0.8)m0. This frequency dependence is believed to result from many-body effects. The second contribution to the magnetoabsorption is formed by a series of narrow lines with ΔB/B∼0.03-0.1 and amplitudes 5-10 times smaller than the features interpreted as cyclotron resonances. These narrow lines are attributed to a superposition of modes due to antiferromagnetic resonance and conduction-electron-spin resonance (ESR). The feature characteristic of antiferromagnetic resonance is the presence of a mode with a frequency that decreases with increasing magnetic field. The magnetoabsorption structure attributed to ESR consists of a relatively broad maximum upon which a sharp dip is superimposed. This behavior is believed to be analogous to the resonant transparency observed in thin metallic films undergoing ESR. |
| spellingShingle | Demishev, S Semeno, A Sluchanko, N Samarin, N Voskoboinikov, I Glushkov, V Singleton, J Blundell, S Hill, S Hayes, W Kartsovnik, M Kovalev, A Kurmoo, M Day, P Kushch, N Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title | Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title_full | Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title_fullStr | Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title_full_unstemmed | Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title_short | Resonant magnetoabsorption of millimeter-wave radiation in the quasi-two-dimensional organic metals alpha -(BEDT-TTF)2MHg(SCN)4 (M=K,Tl). |
| title_sort | resonant magnetoabsorption of millimeter wave radiation in the quasi two dimensional organic metals alpha bedt ttf 2mhg scn 4 m k tl |
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